You searched for subject:(Pressure sensor)
.
Showing records 1 – 30 of
208 total matches.
◁ [1] [2] [3] [4] [5] [6] [7] ▶

University of Connecticut
1.
Zou, Xiyue.
Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling.
Degree: MS, Mechanical Engineering, 2015, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/721
► In Micro-rolling process, metal sheet is imprinted with micron level textures by feeding into the gap between one smooth roll and one textured roll.…
(more)
▼ In Micro-rolling process, metal sheet is imprinted with micron level textures by feeding into the gap between one smooth roll and one textured roll. To enhance the rollability of thin metal sheet and dimensional accuracy, high density current is sent through workpiece to soften the material by increasing temperature. This manufacturing process is called by Electrically-Assisted Micro-rolling (EAμR). EAμR, as a high efficiency and environment protection manufacturing process, can be used for production of key components in Micro-electromechanical Systems and bio-engineering.
To control the quality of product, it is essential to monitor the
pressure distribution in workpiece-roll interface during micro-rolling process. Comparing with process monitoring in conventional rolling process, sensing method in micro-rolling process monitoring not only demands to maintain surface integrity of roll surface, but also is limited by narrow space for sensors installation. Thus, a new sensing method based on embedded capacitance
sensor array has been developed and prototyped for real-time monitoring in Electrically-Assisted Micro-rolling process. In the optimal structural design of embedded
sensor, Finite element modeling is investigated to study the influence of
sensor parameters and electrical current on
sensor. To improve the spatial resolution of embedded
sensor array mounted in a limited space, a new
pressure reconstruction algorithm is presented to retrieve continuous spatial distribution of rolling
pressure from a limited number of measured points. In this context, three research tasks has been identified and examined during the course of this thesis:
1) Design of a new embedded sensing method and its modeling
The new sensing method monitors micro-rolling process by an embedded capacitance
sensor array integrated into smooth roll of micro-rolling mill. The new embedded
sensor using limited
sensor installation space provides a new method to measure contact
pressure between roller and workpiece without damaging the roller surface. It consists of a cylindrical plastic rod as the physical carrier of
sensor array, a group of metal foils attached on cylindrical surface as receiving layer of capacitance array, and a thin plastic film as dielectric material of capacitance. The excitation layer of capacitance
sensor is attached on inner surface of mounting hole in smooth roll. When the sensing rod is mounted into mounting hole, a series of capacitance is formed along axial direction of roll. In the design of mechatronics system, multi-physics modeling, based on finite element method, is developed not only to study the relationship between
sensor parameters and the sensitivity of
sensor, but to understand the thermal and electro-magnetic effect of electrical current passing through workpiece quantitatively as well.
2) Development of prototyping micro-rolling sensing system
Micro-rolling sensing system is developed for real-time monitoring of Electrical-Assisted Micro-Rolling process. The whole…
Advisors/Committee Members: Jiong Tang, Brice Cassenti, Robert X. Gao.
Subjects/Keywords: Sensor; Pressure Mapping; Back-projection
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zou, X. (2015). Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/721
Chicago Manual of Style (16th Edition):
Zou, Xiyue. “Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling.” 2015. Masters Thesis, University of Connecticut. Accessed March 04, 2021.
https://opencommons.uconn.edu/gs_theses/721.
MLA Handbook (7th Edition):
Zou, Xiyue. “Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling.” 2015. Web. 04 Mar 2021.
Vancouver:
Zou X. Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling. [Internet] [Masters thesis]. University of Connecticut; 2015. [cited 2021 Mar 04].
Available from: https://opencommons.uconn.edu/gs_theses/721.
Council of Science Editors:
Zou X. Embedded Sensing and Characterization of Pressure Distribution in Electrically Enhanced Micro-Rolling. [Masters Thesis]. University of Connecticut; 2015. Available from: https://opencommons.uconn.edu/gs_theses/721

NSYSU
2.
Tsai, Meng-Chiao.
Design of a Wearable Blood Pressure Continuous Monitoring Device.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0229117-165555
► With the needs of long-term cares and personal health managements are increasing, the physiological monitoring system are urgent to be established. In physiological signals, the…
(more)
▼ With the needs of long-term cares and personal health managements are increasing, the physiological monitoring system are urgent to be established. In physiological signals, the blood
pressure is one of the most important signals. Both the mercury and electronic sphygmomanometers adopt inflated cuffs to oppress arteries for blood
pressure measurements. The user who uses the cuff chronically or frequently suffers discomfort. Therefore, the cuff-type sphygmomanometers are not suitable for continuous blood
pressure measurements.
ããThis study used a photonthmography (PPG)
sensor and a piezoelectric strain
sensor to measure the pulse signals from the radial artery and the forefinger tip. The length of the pulse transit time between the two signals is used to estimate the blood
pressure. In this study, a push load distribution
sensor composed of tactile sensors and
pressure sensors has been developed. It provides the userâs skin boundary conditions that enhance the repeatability of wearing conditions to eliminate the signal errors caused by the different wearing conditions.
ããIn blood
pressure measurement experiments performed with 10 subjects aged between 20 and 25 years, the estimation mean errors against a validated cuff-type blood
pressure monitor were 2.90% (standard deviation of 22%) and -2.74% (standard deviation of 17%) at rest for systolic and diastolic pressures respectively. The estimation error will be reduced once the push load difference is controlled under 1 %.
Advisors/Committee Members: Wang,Yu-Jen (committee member), Yen,Chen-Wen (chair), Lu,Wen-Hsien (chair).
Subjects/Keywords: Continuous blood pressure monitor; Tactile sensor; Pressure sensor; Strain sensor; Radial artery; Pulse wave signal
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tsai, M. (2017). Design of a Wearable Blood Pressure Continuous Monitoring Device. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0229117-165555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tsai, Meng-Chiao. “Design of a Wearable Blood Pressure Continuous Monitoring Device.” 2017. Thesis, NSYSU. Accessed March 04, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0229117-165555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tsai, Meng-Chiao. “Design of a Wearable Blood Pressure Continuous Monitoring Device.” 2017. Web. 04 Mar 2021.
Vancouver:
Tsai M. Design of a Wearable Blood Pressure Continuous Monitoring Device. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Mar 04].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0229117-165555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tsai M. Design of a Wearable Blood Pressure Continuous Monitoring Device. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0229117-165555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
3.
Bednar, Jonathan Paul.
An all-optical pressure sensor for nuclear power plant applications.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/13863
► An average nuclear power plant in the United States contains between 1,000 and 2,000 pressure transmitters. The use of capacitance cell nuclear pressure transmitters in…
(more)
▼ An average nuclear power plant in the United States contains between 1,000 and 2,000
pressure transmitters. The use of capacitance cell nuclear
pressure transmitters in these high temperature environments degrades integrated sensing electronics and limits the transmitter’s usable life. An all-optical
pressure sensor would remove the transducer interface and communication electronics from the sensing environment— extending the sensor’s life and reducing
sensor maintenance and lifecycle costs.
This paper presents the design and experimental evaluation of a fiber Bragg grating optical
pressure transducer. The primary transduction mechanism of this design relates
pressure in a fluid filled pipe to sensing diaphragm strain using optical diaphragm strain measurements. Similar to capacitance cell
pressure transmitter designs, the proposed
pressure transducer is susceptible to measurement bias induced by temperature perturbations. To minimize measurement bias, a fiber Bragg grating temperature compensation
sensor is used to calculate a temperature independent diaphragm strain measurement.
The transducer design was fabricated and thermal experiments were conducted while the sensing diaphragm was mechanically unconstrained in a thermal chamber. During these experiments, the sensing diaphragm’s temperature corrected strain was calculated while the ambient temperature was perturbed. An experimentally developed coefficient of thermal expansion was found to improve the accuracy of strain temperature compensation. Testing also showed that the time dependence of strain compensation caused the fiber Bragg grating sensing diaphragm to ultimately exhibit 4x the maximum temperature error expected from a capacitance cell
pressure transmitter in the same environment.
The assembled
pressure transducer was experimentally evaluated using a hydraulic test system. The transducer’s sensitivity between 0 and 1,200 psig was experimentally determined to be 1.64 psi/με. A multi-step
pressure experiment was conducted to confirm the transducer’s measurement repeatability. During this test, the maximum difference between
pressure measurements made using the optical transducer and reference instrumentation was 44.3 psi. The mean measurement difference for this test was 19.0 psi. A capacitance cell
pressure transmitter in similar conditions is expected to have an overall measurement accuracy of ± 2.5 psi.
The largest source of measurement error from the fiber Bragg grating
pressure transducer is likely to be the time dependent, transient response of diaphragm strain temperature compensation measurements. Future development of the
pressure transducer concept should focus on reducing temperature compensation errors. Given this improvement, the proposed fiber Bragg grating
pressure transducer has significant potential for nuclear power plant applications.
Advisors/Committee Members: Martin Wesley Trethewey, Thesis Advisor/Co-Advisor, Karl Martin Reichard, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Fiber Bragg grating pressure sensor; optical pressure sensor; nuclear power plant pressure transducer
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bednar, J. P. (2012). An all-optical pressure sensor for nuclear power plant applications. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13863
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bednar, Jonathan Paul. “An all-optical pressure sensor for nuclear power plant applications.” 2012. Thesis, Penn State University. Accessed March 04, 2021.
https://submit-etda.libraries.psu.edu/catalog/13863.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bednar, Jonathan Paul. “An all-optical pressure sensor for nuclear power plant applications.” 2012. Web. 04 Mar 2021.
Vancouver:
Bednar JP. An all-optical pressure sensor for nuclear power plant applications. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 04].
Available from: https://submit-etda.libraries.psu.edu/catalog/13863.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bednar JP. An all-optical pressure sensor for nuclear power plant applications. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/13863
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge
4.
Gardner, Ethan.
Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity.
Degree: PhD, 2020, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/308788
► In a technological world that is trending towards smart and autonomous engineering, the collection of quality data is of unrivalled importance. This has led to…
(more)
▼ In a technological world that is trending towards smart and autonomous engineering, the collection of quality data is of unrivalled importance. This has led to a huge market demand for the development of low-cost, small and accurate sensors and thus has resulted in significant research into sensors, with the aim of advancing the price/performance ratio in commercial solutions. Micro Electro Mechanical Systems (MEMS) have recently offered an attractive solution to miniaturise and drastically improve the performance of sensors. In this thesis, MEMS technology is exploited to create a multi-sensor technology platform that is used to fabricate several sensing technologies. Piezo-resistive and piezo-electronic pressure sensors are designed, fabricated and tested. Different doping profiles, stress-engineered structures and electronic devices for pressure transduction are investigated, with focus on their sensitivity and non-linearity. A ring is fabricated in the metal layer around the circumference of the membrane that alleviates the effects of over/under etching. This is achieved by creating a new rigid edge of the membrane in the metal layer, which has tighter fabrication tolerances. A piezo-MOSFET is developed and shown to have greater sensitivity than similar state-of-the-art devices. Flow sensors based on a heated tungsten wire are designed, fabricated, tested and substantiated with numerical modelling. Calorimetric and anemometric driving modes are optimised with regards to device structure. Thermodiodes are also used as the temperature transduction devices and are compared to the traditional resistor method and showed to be preferable when further miniaturising the sensor. Thermal conductivity gas sensors based on a heated tungsten resistor are designed, tested and substantiated with numerical modelling. Holes through the membrane are used to improve the sensitivity to measuring carbon dioxide by 270%. Asymmetric holes are utilised to prove a novel method of measuring thermal conductivity in a calorimetric method. Designs improving this new concept are outlined and substantiated with analytical and numerical models. Linear statistical methods and artificial neural networks are used to differentiate flow rate and gas concentration using three on-membrane resistors. With membrane holes, the discrimination between gases in the presence of flow is improved. Neural networks provide a viable solution and show an increase in the accuracy of both flow rate and gas concentration. The main objective of the work in this thesis was to develop low-cost, low-power, small devices capable of high-volume production and monolithic integration using a single smart technology platform for fabrication. The smart technology platform was used to create pressure sensors, flow sensors and thermal conductivity gas sensors. Within each sensing technology, proof-of-concepts and optimisations have been carried out in order to maximise performance whilst using the low-cost, high-volume fabrication process, ultimately helping towards smart and…
Subjects/Keywords: MEMS; Sensors; Micromachining; Flow Sensor; Pressure Sensor; CO2 Sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gardner, E. (2020). Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/308788
Chicago Manual of Style (16th Edition):
Gardner, Ethan. “Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity.” 2020. Doctoral Dissertation, University of Cambridge. Accessed March 04, 2021.
https://www.repository.cam.ac.uk/handle/1810/308788.
MLA Handbook (7th Edition):
Gardner, Ethan. “Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity.” 2020. Web. 04 Mar 2021.
Vancouver:
Gardner E. Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity. [Internet] [Doctoral dissertation]. University of Cambridge; 2020. [cited 2021 Mar 04].
Available from: https://www.repository.cam.ac.uk/handle/1810/308788.
Council of Science Editors:
Gardner E. Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity. [Doctoral Dissertation]. University of Cambridge; 2020. Available from: https://www.repository.cam.ac.uk/handle/1810/308788

University of California – Riverside
5.
Aguilera, Juan Luis.
Electronic Transport in Strained Graphene.
Degree: Physics, 2015, University of California – Riverside
URL: http://www.escholarship.org/uc/item/588449mz
► Graphene is a single atomic layer material with exceptional electronic and mechanical properties. Graphene has formed the basis of many nanoelectromechanical and strain sensing devices.…
(more)
▼ Graphene is a single atomic layer material with exceptional electronic and mechanical properties. Graphene has formed the basis of many nanoelectromechanical and strain sensing devices. However, the ultimate limit of miniaturization of such sensors has not yet been ascertained. In this work we present the fabrication and electrical characterization of nanoscale pressure sensors realized from suspended graphene membrane devices.We start in chapter 1 by describing the elemental electronic properties of graphene. Followed by the motivation of the origin of the particular geometry used in our pressure sensors. Chapter 2 describes in detail the fabrication techniques required to make the graphene devices. In chapter 3 we show the room temperature electrical transport of our devices and find that the injected current division between counter electrodes depends on pressure and can be used to realize a nanoscale pressure sensor. Estimating various potential contributions to the resistivity change of the deflected graphene membrane including piezoresistivity, changing gate capacitance, and the valley Hall effect due to the pressure-induced synthetic magnetic field, we find that the valley Hall effect yields the largest expected contribution to the longitudinal resistivity modulation for accessible device parameters. Chapter 4 shows the electronic transport at low temperatures. We find conductance fluctuations as a function of gate voltage. Finally we conclude with a brief summary and potential research outlook.
Subjects/Keywords: Physics; graphene; MEMS; pressure sensor; strain engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aguilera, J. L. (2015). Electronic Transport in Strained Graphene. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/588449mz
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Aguilera, Juan Luis. “Electronic Transport in Strained Graphene.” 2015. Thesis, University of California – Riverside. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/588449mz.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aguilera, Juan Luis. “Electronic Transport in Strained Graphene.” 2015. Web. 04 Mar 2021.
Vancouver:
Aguilera JL. Electronic Transport in Strained Graphene. [Internet] [Thesis]. University of California – Riverside; 2015. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/588449mz.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aguilera JL. Electronic Transport in Strained Graphene. [Thesis]. University of California – Riverside; 2015. Available from: http://www.escholarship.org/uc/item/588449mz
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech
6.
De Clerck, Albrey Paul.
Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities.
Degree: MS, Mechanical Engineering, 2020, Virginia Tech
URL: http://hdl.handle.net/10919/100688
► Pressure sensors are used in most engineering applications, and the demand is ever increasing due to emerging fields such as the Internet of things (IOT),…
(more)
▼ Pressure sensors are used in most engineering applications, and the demand is ever increasing due to emerging fields such as the Internet of things (IOT), automations, and autonomy. One drawback of current pressures
sensor technology is their need to be calibrated, ensuring accuracy and function.
Sensor calibration requires equipment, trained personnel, and must be done regularly, resulting in significate costs. Borrowing technology, methods, and materials from the integrated circuit industry, the costs of
sensor calibration can be addressed by the development of an intelligent MEMS (micro-electromechanical system)
pressure sensor with self-calibration capabilities. The self-calibrating capability is achieved by combining a micro-actuator and a micro- pressures
sensor into one system.
This work focuses on complementing previously obtained experimental testing data with a thermal finite element model to provide a deeper understanding and insight. The model is implemented in the commercial software ANSYS and model uncertainties were addressed via model calibration. The model revealed a temperature gradient within the
sensor, and insight into its potential effects.
The model is also used as a design tool to reduce energy inefficiencies, decrease the time it takes the
sensor to respond, and to study the effects of reducing the
sensor size. The studies showed that the power consumption can potentially be decreased up to 92% and the response time can be decreased up to 99% by changing the
sensor's substrate material. Furthermore, by halving the
sensor reference cavity size, the cavity temperature can be increased by 45% and the time for the
sensor to respond can be decrease by 59%.
Advisors/Committee Members: Ng, Wing Fai (committeechair), Paul, Mark R. (committee member), West, Robert L. (committee member).
Subjects/Keywords: Self-calibrating; Intelligent; MEMS; Pressure Sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De Clerck, A. P. (2020). Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/100688
Chicago Manual of Style (16th Edition):
De Clerck, Albrey Paul. “Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities.” 2020. Masters Thesis, Virginia Tech. Accessed March 04, 2021.
http://hdl.handle.net/10919/100688.
MLA Handbook (7th Edition):
De Clerck, Albrey Paul. “Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities.” 2020. Web. 04 Mar 2021.
Vancouver:
De Clerck AP. Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities. [Internet] [Masters thesis]. Virginia Tech; 2020. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10919/100688.
Council of Science Editors:
De Clerck AP. Modeling the Thermal Performance of an Intelligent MEMS Pressure Sensor with Self-Calibration Capabilities. [Masters Thesis]. Virginia Tech; 2020. Available from: http://hdl.handle.net/10919/100688

Delft University of Technology
7.
Ramesha, Raghutham (author).
A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:d8ffb5c3-6a25-401c-8594-70a80fc92190
► Graphene is an attractive material to be used for pressure sensors due to its thinness, electrical conductivity, and potential high gauge factor. One of the…
(more)
▼ Graphene is an attractive material to be used for pressure sensors due to its thinness, electrical conductivity, and potential high gauge factor. One of the issues with processing graphene is the scalability, which is largely limited by the transfer process that is required for graphene deposited by chemical vapour deposition (CVD). In this work we employed a novel, transfer-free bulk-micromachining approach to realize graphene-based differential pressure sensors. The devices were successfully fabricated, and the samples were examined under Raman Spectroscopy, and electrically characterized. Further, pressure dependent measurements were performed for a dynamic range of 0 to 80 kPa of differential pressure and the corresponding change in resistance of the membrane was measured. The fabricated devices have a mean Gauge Factor of 2.80.
Electrical Engineering
Advisors/Committee Members: Vollebregt, Sten (mentor), Sarro, Lina (graduation committee), Steeneken, Peter (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Graphene; Pressure Sensor; bulk micromachining; MEMS
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ramesha, R. (. (2019). A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d8ffb5c3-6a25-401c-8594-70a80fc92190
Chicago Manual of Style (16th Edition):
Ramesha, Raghutham (author). “A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor.” 2019. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:d8ffb5c3-6a25-401c-8594-70a80fc92190.
MLA Handbook (7th Edition):
Ramesha, Raghutham (author). “A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor.” 2019. Web. 04 Mar 2021.
Vancouver:
Ramesha R(. A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:d8ffb5c3-6a25-401c-8594-70a80fc92190.
Council of Science Editors:
Ramesha R(. A Complete Overview on Realizing Transfer-free Graphene-based Differential Pressure Sensor. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:d8ffb5c3-6a25-401c-8594-70a80fc92190

Penn State University
8.
Goel, Nishit.
Application of Micromachined Quartz Resonators for Pressure and Stress Sensing.
Degree: 2018, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15846nxg932
► In this dissertation, a study on micromachined AT-cut quartz crystal resonators for use as differential pressure and thin film stress sensing applications has been carried…
(more)
▼ In this dissertation, a study on micromachined AT-cut quartz crystal resonators for use as differential
pressure and thin film stress sensing applications has been carried out. The property of quartz crystal resonator, known as “force frequency effect,” has been utilized whereby quartz resonators shift its thickness shear mode resonance frequency due to application of force/stress. A theoretical model based on first principles has also been proposed and has been modeled in a commercial finite element software to accurately predict the behavior of the quartz resonators to the external stimulus of interest.
The structure of an AT-cut quartz based
pressure sensor consists of an edge clamped square quartz plate that has been etched in certain regions with the help of micromachining techniques. The electrodes are placed in the etched regions or diaphragms which are resonated in their thickness shear mode resonance. A differential
pressure is applied to the structure leading to stress generation in the diaphragms as hence a shift in the resonance frequency. An experimental study on varying physical dimensions such as thickness and diameter of the
sensor diaphragm on sensitivity of quartz resonator based
pressure sensors has been presented. The sensors have shown high sensitivity with a resolution of ~1.04 mTorr and range of operation from mTorr to >100 Torr differential
pressure with high linearity. The sensors have also shown a dependence upon the face of diaphragm on which
pressure is applied which relates to the structural asymmetry and boundary conditions of the device.
In the second study, micromachined AT-cut quartz resonators have been utilized for sensing stresses in the thin films with a potential application for in-situ thin film stress monitoring. Mass sensitivity of quartz resonators is a well-known phenomenon and has been extensively utilized for microbalance and thickness monitoring applications. The addition of mass on a quartz resonator leads to a reduction in its thickness shear mode resonance. Hence, to compensate for this mass sensitivity for in-situ stress monitoring applications, two resonator technique has been utilized. One resonator is in a cantilever configuration which is sensitive to mass and stress whereas the other resonator is in a fixed plate configuration and hence is only sensitive to the mass. A differential measurement of the frequency shifts of the two resonators will cancel out the effect of mass and the remainder would be a measure of thin film stress. A comprehensive stress characterization study was performed by integrating the quartz cantilevers with a magnetostrictive material called Metglas® to form a unimorph structure. Magnetic fields were applied to the unimorph structure which leads to a strain generation in the Metglas® and thereby flexural bending of the unimorph structure. This bending of the quartz cantilever leads to generation of both in-plane and out of plane stresses in the structure and hence a shift in the thickness shear mode resonance frequency of the quartz…
Advisors/Committee Members: Srinivas Tadigadapa, Dissertation Advisor/Co-Advisor, Srinivas Tadigadapa, Committee Chair/Co-Chair, Mehdi Kiani, Committee Member, Siyang Zheng, Committee Member, Christopher Rahn, Outside Member.
Subjects/Keywords: Quartz; Resonator; Piezoelectric; Pressure Sensor; Stress Sensor; Metglas; Magnetrostriction
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Goel, N. (2018). Application of Micromachined Quartz Resonators for Pressure and Stress Sensing. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15846nxg932
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Goel, Nishit. “Application of Micromachined Quartz Resonators for Pressure and Stress Sensing.” 2018. Thesis, Penn State University. Accessed March 04, 2021.
https://submit-etda.libraries.psu.edu/catalog/15846nxg932.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Goel, Nishit. “Application of Micromachined Quartz Resonators for Pressure and Stress Sensing.” 2018. Web. 04 Mar 2021.
Vancouver:
Goel N. Application of Micromachined Quartz Resonators for Pressure and Stress Sensing. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Mar 04].
Available from: https://submit-etda.libraries.psu.edu/catalog/15846nxg932.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Goel N. Application of Micromachined Quartz Resonators for Pressure and Stress Sensing. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15846nxg932
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Univerzitet u Beogradu
9.
Frantlović, Miloš P., 1970-.
Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима.
Degree: Elektrotehnički fakultet, 2016, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:12036/bdef:Content/get
► Tехничке науке – Eлектротехника и рачунарство / Technical sciences – Electrical and computer engineering
Примена сензора је у наглом порасту у свим областима живота и…
(more)
▼ Tехничке науке – Eлектротехника и рачунарство /
Technical sciences – Electrical and computer
engineering
Примена сензора је у наглом порасту у свим
областима живота и рада. Све је већи број физичких, али и других
(хемијских, биолошких) величина које је потребно мерити, уз растуће
захтеве у погледу функционалности и мерних перформанси уређаја и уз
истовремено смањење димензија, цене и потрошње енергије. Појавом
микроелектромеханичких технологија и система (МЕМС), почело је ново
раздобље у развоју сензора, које и данас траје. Сензори које је тим
технологијама могуће реализовати по карактеристикама су упоредиви
или бољи од конвенционалних, а малих су димензија и погодни за
јефтину масовну производњу. Конвергенцијом сензорских, рачунарских
и комуникационих технологија настали су интелигентни инструменти и
дистрибуирани сензорски системи, чиме се достиже нови ниво
функционалности и перформанси. Научна истраживања у области
сензора, мерних метода и инструмената су због тога веома актуелна и
имају све израженији мултидисциплинарни карактер. Циљ истраживања
обухваћених овом дисертацијом је унапређење функционалности и
перформанси интелигентних индустријских мерних инструмената
заснованих на постојећим и новим МЕМС сензорима, посебно на онима
који се развијају и производе у Центру за микроелектронске
технологије Института за Хемију, технологију и металургију. Пошто
једино свеобухватни приступ, од теоријских истраживања, преко
развоја сензора и обраде сигнала до готовог мерног инструмента,
може да пружи квалитетан резултат употребљив у пракси, ова
дисертација је конципирана тако да садржи све те елементе. У
дисертацији је дат преглед МЕМС технологија и сензора, где је
тежиште на МЕМС сензорима механичких величина, а нарочито на
пиезоотпорним сензорима притиска. Као допринос значајан за ту
област, приказани су резултати експерименталног истраживања
електричних карактеристика МЕМС структура израђених на флексибилним
супстратима, од посебног интереса за примене МЕМС сензора у
медицинским имплантима, протезама, одећи, као и у роботици. Од
нових МЕМС сензора који се истражују у Центру и другим научним
установама у свету, као посебно значајни се издвајају сензори
хемијских и биолошких величина, чији се принцип рада заснива на
адсорпцији честица. У овој...
Advisors/Committee Members: Stanković, Srđan, 1945-.
Subjects/Keywords: MEMS; sensor; pressure; temperature; chemical sensor;
intelligent instrument
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Frantlović, Miloš P., 1. (2016). Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:12036/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Frantlović, Miloš P., 1970-. “Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима.” 2016. Thesis, Univerzitet u Beogradu. Accessed March 04, 2021.
https://fedorabg.bg.ac.rs/fedora/get/o:12036/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Frantlović, Miloš P., 1970-. “Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима.” 2016. Web. 04 Mar 2021.
Vancouver:
Frantlović, Miloš P. 1. Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима. [Internet] [Thesis]. Univerzitet u Beogradu; 2016. [cited 2021 Mar 04].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:12036/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Frantlović, Miloš P. 1. Унапређење интелигентих индустријских мерних инструмената
са МЕМС сензорима. [Thesis]. Univerzitet u Beogradu; 2016. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:12036/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Western Ontario
10.
Liu, Sicong.
Electrically Conductive Cotton Textile and Its Applications.
Degree: 2016, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/3788
► Electronic textiles (e-textiles) have been considered as important applications in wearable electronics, which can combine the functionality of smart electronic devices with the comfort and…
(more)
▼ Electronic textiles (e-textiles) have been considered as important applications in wearable electronics, which can combine the functionality of smart electronic devices with the comfort and flexibility of stylish clothing. Herein, we have successfully prepared a conductive textile via electroless deposition onto cotton textiles by using a three-step treatment process. The cotton textiles are first dipped in P4VP-SU8 solution to form a uniform layer for the subsequent absorption of silver ions. Then, the cotton textiles are immersed in silver nitrate solution in preparation for the next step electroless deposition. The sheet resistance can be as low as 0.05 Ωsq-1. Two sensors were made based on the copper coated cotton textiles. One is flexible pressure sensor, the other is ECG sensor. Both sensors performed well, proving this method is a promising candidate for applications in the fabrication of functional textile-based wearable devices.
Subjects/Keywords: E-textiles; Electroless deposition; Pressure sensor; ECG sensor; Nanoscience and Nanotechnology
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, S. (2016). Electrically Conductive Cotton Textile and Its Applications. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/3788
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Sicong. “Electrically Conductive Cotton Textile and Its Applications.” 2016. Thesis, University of Western Ontario. Accessed March 04, 2021.
https://ir.lib.uwo.ca/etd/3788.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Sicong. “Electrically Conductive Cotton Textile and Its Applications.” 2016. Web. 04 Mar 2021.
Vancouver:
Liu S. Electrically Conductive Cotton Textile and Its Applications. [Internet] [Thesis]. University of Western Ontario; 2016. [cited 2021 Mar 04].
Available from: https://ir.lib.uwo.ca/etd/3788.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu S. Electrically Conductive Cotton Textile and Its Applications. [Thesis]. University of Western Ontario; 2016. Available from: https://ir.lib.uwo.ca/etd/3788
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Victoria
11.
Bostock, Riccardo.
An oceanographic pressure sensor based on an in-fibre Bragg grating.
Degree: Department of Mechanical Engineering, 2020, University of Victoria
URL: http://hdl.handle.net/1828/11693
► Deep-ocean pressure measurements are a necessary component for ocean characterization and oceanographic monitoring. Some principle applications such as tsunami detection and ocean floor subsidence are…
(more)
▼ Deep-ocean
pressure measurements are a necessary component for ocean characterization and oceanographic monitoring. Some principle applications such as tsunami detection and ocean floor subsidence are reliant on deep-ocean
pressure measurement data. The deep ocean is a challenging environment especially for
pressure measurements; discerning
pressure changes that are a small fraction of the ambient
pressure calls for intelligent engineering solutions.
An ocean-deployable concept model of a
pressure sensor is developed. The design is based on a diaphragm transducer intended for measuring hydrostatic
pressure changes on the order of 1 centimeter of water (cmH2O) while exposed to ambient pressures several orders of magnitude greater for up to 2500 meters of water (mH2O). Two laboratory-scale
pressure sensors are fabricated to test the fundamental principle of the proposed concept at lab-safe pressures. One is a single-sided
sensor exposed to atmospheric
pressure. The second
sensor is a two-sided design that operates at a defined target depth
pressure and measures the differential
pressure across both faces of the diaphragm.
The
sensor design built for atmospheric
pressure testing observed a mean experimental sensitivity of 6.05 pm/cmH2O in contrast to 6 pm/cmH2O determined theoretically. The percent error between the experimental and theoretical values is 0.83%. The second design was tested at target depth pressures of 10, 20, 40, and 60 psi (7, 14, 28, and 42 mH2O) and performance was within 5.8%, 2.8%, 0.7%, 4.0% respectively when considering percent error of the mean experimental and theoretical. The repeatability was sufficient for a given sample and
pressure response within the range proposed in theory when a
pressure preload was present to the diaphragm. Future work will aim at developing a design concept that incorporates a piston and is tested at a higher hydrostatic
pressure system, and within ocean waters. A deployment plan and consideration of challenges associated with ocean testing will be accounted for.
Advisors/Committee Members: Wild, Peter (supervisor).
Subjects/Keywords: pressure sensor; diaphragm; fiber Bragg grating; FBG; ocean bottom; tsunami sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bostock, R. (2020). An oceanographic pressure sensor based on an in-fibre Bragg grating. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/11693
Chicago Manual of Style (16th Edition):
Bostock, Riccardo. “An oceanographic pressure sensor based on an in-fibre Bragg grating.” 2020. Masters Thesis, University of Victoria. Accessed March 04, 2021.
http://hdl.handle.net/1828/11693.
MLA Handbook (7th Edition):
Bostock, Riccardo. “An oceanographic pressure sensor based on an in-fibre Bragg grating.” 2020. Web. 04 Mar 2021.
Vancouver:
Bostock R. An oceanographic pressure sensor based on an in-fibre Bragg grating. [Internet] [Masters thesis]. University of Victoria; 2020. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1828/11693.
Council of Science Editors:
Bostock R. An oceanographic pressure sensor based on an in-fibre Bragg grating. [Masters Thesis]. University of Victoria; 2020. Available from: http://hdl.handle.net/1828/11693

University of California – Irvine
12.
Mendoza, Nicole Leigh.
Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection.
Degree: Biomedical Engineering, 2016, University of California – Irvine
URL: http://www.escholarship.org/uc/item/1999675b
► The emergence of wearable electronics provides opportunity for continuous health monitoring. Current wearable devices are unable to continuously monitor blood pressure, primarily due to poor…
(more)
▼ The emergence of wearable electronics provides opportunity for continuous health monitoring. Current wearable devices are unable to continuously monitor blood pressure, primarily due to poor wearability and sensing limitations of the sphygmomanometer. The development of conformal pressure sensors enables continuous measurement of pulse pressure, offering an alternative to the outdated cuff. Although conformal sensors show promising sensing properties at low pressures, expensive fabrication and unrealistic applications have hindered their adoption. This work provides a simple, low cost, scalable method for fabricating piezoresistive sensors by combining wrinkle-patterned polydimethsiloxane and highly conductive carbon nanotubes. These flexible pressure sensors demonstrate high sensitivity (0.65kPa-1), fast response time (<10ms), and low power consumption, with an operating voltage of ~1V. This work further demonstrates the application of these sensors for real-time monitoring of pulse pressure, as well as their compatibility with wearable electronics.
Subjects/Keywords: Biomedical engineering; blood pressure; piezoresistive; pressure; pulse; sensor; wearable
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mendoza, N. L. (2016). Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/1999675b
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mendoza, Nicole Leigh. “Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection.” 2016. Thesis, University of California – Irvine. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/1999675b.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mendoza, Nicole Leigh. “Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection.” 2016. Web. 04 Mar 2021.
Vancouver:
Mendoza NL. Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection. [Internet] [Thesis]. University of California – Irvine; 2016. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/1999675b.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mendoza NL. Wrinkled Thin Film Pressure Sensors for Pulse Pressure Detection. [Thesis]. University of California – Irvine; 2016. Available from: http://www.escholarship.org/uc/item/1999675b
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah
13.
Coleman, Tanner Joseph.
Monitoring intra-abdominal pressure during physical activity.
Degree: PhD, Bioengineering, 2014, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3365/rec/1635
► Pelvic floor disorders (PFD) affect one in four women in the United States. Elevated intra-abdominal pressure (IAP) during daily activity or strenuous physical activityhas been…
(more)
▼ Pelvic floor disorders (PFD) affect one in four women in the United States. Elevated intra-abdominal pressure (IAP) during daily activity or strenuous physical activityhas been identified as a risk factor in the prevalence of PFD. However, the relationship between IAP and physical activity remains poorly understood. Despite the lack ofscientific evidence, clinicians oftentimes prescribe long-term activity restrictions to urogynecologic postoperative patients to minimize IAP, which is thought to lessen the load on the pelvic floor. Since many health benefits are associated with exercise, it is necessary to understand how IAP changes with activity in order to reduce risk to the pelvic floor while allowing women to be physically active. Current methods of measuring IAPinclude invasive catheters in the vagina, rectum, bladder, or stomach that are tethered to laboratory equipment and have been shown to have poor dynamic response. These characteristics limit the potential for tracking IAP during daily physical activity away fromthe clinic. The objectives of this research were to determine how intra-abdominal routine that may be adapted for postsurgical patients. Three phases of this work included (1) development of a wireless gel-filled intravaginal pressure sensor to accurately trackintra-abdominal pressure, (2) testing the newly developed intravaginal sensor in benchtop and in vivo settings to determine the utility of sensors in real-world deployments, and (3) using the wireless intravaginal pressure sensor to characterize IAP during exercise and, based upon results, create a low intra-abdominal pressure routine that can be used to exercise while minimizing pressure load on the pelvic floor.
Subjects/Keywords: Exercise; Intra-abdominal pressure; Pelvic floor; Pilates; Pressure sensor; Wireless
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Coleman, T. J. (2014). Monitoring intra-abdominal pressure during physical activity. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3365/rec/1635
Chicago Manual of Style (16th Edition):
Coleman, Tanner Joseph. “Monitoring intra-abdominal pressure during physical activity.” 2014. Doctoral Dissertation, University of Utah. Accessed March 04, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3365/rec/1635.
MLA Handbook (7th Edition):
Coleman, Tanner Joseph. “Monitoring intra-abdominal pressure during physical activity.” 2014. Web. 04 Mar 2021.
Vancouver:
Coleman TJ. Monitoring intra-abdominal pressure during physical activity. [Internet] [Doctoral dissertation]. University of Utah; 2014. [cited 2021 Mar 04].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3365/rec/1635.
Council of Science Editors:
Coleman TJ. Monitoring intra-abdominal pressure during physical activity. [Doctoral Dissertation]. University of Utah; 2014. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3365/rec/1635

UCLA
14.
Mancillas, Francisco Javier.
Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery.
Degree: Electrical Engineering, 2018, UCLA
URL: http://www.escholarship.org/uc/item/8zz2q7qw
► It is known that the absence of tactile feedback in robotic surgery represents a limiting factor to surgeons. In effect, the lack of tactile feedback…
(more)
▼ It is known that the absence of tactile feedback in robotic surgery represents a limiting factor to surgeons. In effect, the lack of tactile feedback in robotic surgical tools is closely associated with tissue damage. This is especially true among novice surgeons who, not having surgical tools that measure compressive sensing, apply excessive force causing tissue crush injuries. Additionally, the lack of tactile feedback in the shear directions lead to additional problems, such as breaking of sutures due to excessive pull forces. In view of the lack of tactile feedback, our efforts have been focused on developing a highly sensitive micro-scale, tri-axial, capacitive-based, differential force sensor. To this end, we provide relevant derivations to single-element, multi-axis capacitive sensing including an illustrative discussion on capacitive pressure sensor (CPS) theory. We begin our discussion on CPS theory with the well-known parallel plate capacitor to illustrate key physical concepts and move on to more complex structures, such as capacitors with asymmetrical surface areas under deformation. Whenever possible, we provide explicit capacitance expressions for these last structures and demonstrate that such expressions reduce to more familiar ones. To ensure the validity of our theoretical calculations, we have also provided results obtained from COMSOL Multiphysics simulations. It is worth mentioning that for our theoretical calculations, we have only considered deformations in the downward direction as a result of external forces applied to the top surface of the CPS model so as to facilitate the evaluation of capacitance expressions. For the COMSOL Multiphysics simulations of our proposed capacitive force sensor (CFS) model, on the other hand, no restrictions are imposed on the direction of deformation. The design, including sensor location and performance criteria, of our current CFS model is also considered as well as its working principle.
Subjects/Keywords: Electrical engineering; Mechanical engineering; capacitive sensor; force sensor; haptic feedback; pressure sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mancillas, F. J. (2018). Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/8zz2q7qw
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mancillas, Francisco Javier. “Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery.” 2018. Thesis, UCLA. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/8zz2q7qw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mancillas, Francisco Javier. “Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery.” 2018. Web. 04 Mar 2021.
Vancouver:
Mancillas FJ. Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery. [Internet] [Thesis]. UCLA; 2018. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/8zz2q7qw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mancillas FJ. Analysis of a Micro-scale, Tri-axial, Capacitive-based, Differential Force Sensor for Haptic Feedback System in Robotic Surgery. [Thesis]. UCLA; 2018. Available from: http://www.escholarship.org/uc/item/8zz2q7qw
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oklahoma State University
15.
Beerwinkle, Austin Dale.
Nonlinear Finite Element Modeling of Quartz Crystal Resonators.
Degree: Mechanical & Aerospace Engineering, 2011, Oklahoma State University
URL: http://hdl.handle.net/11244/9894
► In order to facilitate the design of quartz resonators, the overall goal of the current work was to develop an accurate three-dimensional finite element model…
(more)
▼ In order to facilitate the design of quartz resonators, the overall goal of the current work was to develop an accurate three-dimensional finite element model for the anisotropic frequency response of quartz. The model was based on the linear incremental equations for superimposed small vibrations onto nonlinear thermoelastic stressed media. The frequency response of the model was benchmarked to experimental data from quartz
pressure sensors with temperature ranging from 50 °C to 200 °C and
pressure from 14 psi to 20,000 psi. This direct finite element approach for frequency response at such high
pressure had not been previously examined in literature. The normalized frequency response to the change in external
pressure from 14 psi to 20,000 psi matched very well with experimental data for lower temperatures, having a maximum deviation of only 7.5% at 20,000 psi when assuming constant 50 °C temperature. However, the same deviation grew to 25.7% assuming a higher 200 °C constant temperature. Similarly, the temperature-frequency response at constant
pressure from 50 °C to 200 °C matched the experimental trend well for lower pressures, but this agreement deteriorated as
pressure increased. The nature of the observed frequency deviations suggests that changes in the third-order elastic constants with temperature, a quartz material definition that is not currently available in literature, could play a significant role in accurately modeling the frequency response at such conditions, and that the lack of such properties is the primary source of the error in both temperature and
pressure response. This hypothesis was tested by using a novel method of giving the third-order elastic constants linear temperature dependence based on a single scalar parameter, for which a specific value was empirically derived for the AT-Cut quartz
pressure sensor studied. Specifically, modeling a scalar decrease in magnitude of about 0.0775% per °C in the third-order elastic coefficients was shown to decrease the error of the simulation at the highest temperature and
pressure from 25.7% to 4.0%, and this improvement was mirrored throughout the range of temperatures and pressures tested. Furthermore, knowing the expected benefit of implementing the third-order elastic coefficients as functions of temperature should aid future researchers in deciding if defining their full anisotropic temperature derivatives is practical, and relevant possibilities for such a study are given.
Advisors/Committee Members: Singh, Raman Pal (advisor), Hanan, Jay C. (committee member), Harimkar, Sandip P. (committee member).
Subjects/Keywords: downhole sensor; finite element modeling; frequency response simulation; pressure sensor; quartz; temperature sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beerwinkle, A. D. (2011). Nonlinear Finite Element Modeling of Quartz Crystal Resonators. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/9894
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Beerwinkle, Austin Dale. “Nonlinear Finite Element Modeling of Quartz Crystal Resonators.” 2011. Thesis, Oklahoma State University. Accessed March 04, 2021.
http://hdl.handle.net/11244/9894.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Beerwinkle, Austin Dale. “Nonlinear Finite Element Modeling of Quartz Crystal Resonators.” 2011. Web. 04 Mar 2021.
Vancouver:
Beerwinkle AD. Nonlinear Finite Element Modeling of Quartz Crystal Resonators. [Internet] [Thesis]. Oklahoma State University; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/11244/9894.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Beerwinkle AD. Nonlinear Finite Element Modeling of Quartz Crystal Resonators. [Thesis]. Oklahoma State University; 2011. Available from: http://hdl.handle.net/11244/9894
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cincinnati
16.
Wu, Zhizhen.
Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI).
Degree: PhD, Engineering and Applied Science: Electrical
Engineering, 2017, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045589967871
► Pressure and temperature are parameters essential for brain monitoring. Currently, the intracranial pressure (ICP) and intracranial temperature (ICT) are measured by the separate sensors/catheters in…
(more)
▼ Pressure and temperature are parameters essential for
brain monitoring. Currently, the intracranial
pressure (ICP) and
intracranial temperature (ICT) are measured by the separate
sensors/catheters in clinic. Although integrated ICP and ICT
sensors with low cost and minimal damage to brain is highly
favored, the integration of the sensors involves complicate
assembly and packaging process, and also increases the diameter of
micro-catheters. Researches have been done to develop integrated
pressure and temperature sensors on the same platform, especially
on flexible substrate, to minimize the damage to brain caused by
the device implantation. However, the developed sensors are either
merely prove-of-concept or difficult to be manufactured due to the
complicate and costly process. This work proposes and explores
novel approaches to develop the integrated flexible ICP and ICT
sensors with low cost and simple process. High quality polysilicon
thin film was directly grown on flexible substrate as the sensing
material for both ICP and ICT sensors with simple, fast, and low
cost aluminum induced crystallization (AIC) process. A continuous
P-type polysilicon film with the crystals’ average size of 49 nm
was developed and shown. Based on the polysilicon thin film, a
flexible thermistor array was designed, developed and
characterized. It achieved good in vitro performance with a
sensitivity of -0.0031/°C, response time of 1.5 s, resolution of
0.1 °C, thermal hysteresis less than 0.1°C, and long term stability
with drift less than 0.3 °C for 3 days in water. In vivo tests of
the polysilicon thermistor showed a low noise level of 0.025±0.03
°C and the expected transient temperature increase associated with
cortical spreading depolarization. In addition, polysilicon based
flexible
pressure sensor was developed for ICP measurement. The
gauge factor of polysilicon thin film was characterized with a
value of 10.316. The dimensions of the flexible piezoresistive
pressure sensor were designed with COMSOL multiphysics simulation
to achieve high sensitivity and linearity. The developed flexible
pressure sensor showed a sensitivity of 6 × 10-4 / mmHg, resolution
of 1 mmHg, and hysteresis of less than 1 mmHg for the
pressure
range of 10 to 20 mmHg, which totally met the requirements of ICP
monitoring. Finally, a 1 × 4 integrated flexible
pressure and
temperature
sensor array was developed and characterized for
monitoring the temperature and possible
pressure vectors in brain.
The real-time measurements of
pressure and temperature were
performed in an immolated brain model for monitoring any
pressure
vectors or gradients. The preliminary experiment results showed
that the developed
sensor array had high enough sensitivity to
detect the
pressure differences or gradients in brain if any. In
conclusion, this work has proposed and developed innovative
polysilicon-based flexible temperature and
pressure sensors for ICP
and ICT monitoring. The development of polysilicon thin film on
flexible polyimide with simple, low cost and high yield has been…
Advisors/Committee Members: Ahn, Chong (Committee Chair).
Subjects/Keywords: Electrical Engineering; Intracranial pressure; Intracranial temperature; flexible sensor; polysilicon thin film; sensor array; MEMS sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wu, Z. (2017). Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI). (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045589967871
Chicago Manual of Style (16th Edition):
Wu, Zhizhen. “Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI).” 2017. Doctoral Dissertation, University of Cincinnati. Accessed March 04, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045589967871.
MLA Handbook (7th Edition):
Wu, Zhizhen. “Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI).” 2017. Web. 04 Mar 2021.
Vancouver:
Wu Z. Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI). [Internet] [Doctoral dissertation]. University of Cincinnati; 2017. [cited 2021 Mar 04].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045589967871.
Council of Science Editors:
Wu Z. Flexible Microsensors based on polysilicon thin film for
Monitoring Traumatic Brain Injury (TBI). [Doctoral Dissertation]. University of Cincinnati; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045589967871
17.
ENGVALL, THERESE.
Pressure sensitive textiles for integration in saddle pads.
Degree: Swedish School of Textiles, 2013, University of Borås
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397
► : In this thesis, capacitive textile pressure sensors have been developed. The sensors were meant to be integrated into saddle pads and be able…
(more)
▼ : In this thesis, capacitive textile pressure sensors have been developed. The sensors were meant to be integrated into saddle pads and be able to measure the pressure between the saddle and horse. The aim of the thesis was to create a theoretical and practical based map on how a textile pressure sensor can be made. Capacitance was found to be the most suitable pressure sensitive technique to be implemented in a textile structure. The project was divided into two cycles, where the first cycle consisted of laminating capacitive textile pressure sensors of readymade fabrics in different thicknesses and sizes. After testing the pressure sensitivity of these laminates, it was concluded that a thin fabric with some compressibility was sufficient for making a textile capacitive pressure sensor. However, the area cannot be too small. The second cycle consisted of weaving capacitive pressure sensors as three layer structures. The pressure sensitivity of the sensors and the effect of moisture were tested. The results showed that most of the woven sensors were able to sense a 50g change in weight even after a 700g load was put on. The moisture and water tests showed that the pressure sensors must be protected from water and moisture. It was also discovered that there is a lack of knowledge in how textile structures and fibres behave under compression and release. Models of how textiles behave during pressure are needed to do correct transformations between compression and pressure and predict how the textile will behave during different pressures.
Program: Masterutbildning i textilteknik
Subjects/Keywords: Textile pressure sensor; saddle pad; saddle pressure; capacitive pressure sensor; press sensitive principles; Engineering and Technology; Teknik och teknologier
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
ENGVALL, T. (2013). Pressure sensitive textiles for integration in saddle pads. (Thesis). University of Borås. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
ENGVALL, THERESE. “Pressure sensitive textiles for integration in saddle pads.” 2013. Thesis, University of Borås. Accessed March 04, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
ENGVALL, THERESE. “Pressure sensitive textiles for integration in saddle pads.” 2013. Web. 04 Mar 2021.
Vancouver:
ENGVALL T. Pressure sensitive textiles for integration in saddle pads. [Internet] [Thesis]. University of Borås; 2013. [cited 2021 Mar 04].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
ENGVALL T. Pressure sensitive textiles for integration in saddle pads. [Thesis]. University of Borås; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Southern California
18.
Welcher, Judson B.
Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing.
Degree: PhD, Biomedical Engineering, 2011, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/650531/rec/1973
► There is a very high and increasing frequency of back pain in modern society with an estimate annual cost of $100 billion dollars just in…
(more)
▼ There is a very high and increasing frequency of back
pain in modern society with an estimate annual cost of $100 billion
dollars just in the United States. The precise etiology of low back
pain lacks a general consensus. However, the facet joints have been
shown to be a significant source of spinal pain, and specifically
low back pain. Despite being a significant source of pain, very
little accurate data is available on the loads within the facet
joints. ❧ This study’s primary goal was to provide improved data,
thus facilitating a better understanding of lumbar spine
intra-articular facet loads during movement. This was ultimately
accomplished by the development, validation and implementation of a
new method for direct measurement of intra-articular load. It was
initially thought that a better understanding of lumbar spine
intra-articular facet loads during movement could be accomplished
with the application of existing technology. The preliminary phases
of this study involved evaluating a large volume of literature
related to previously published methods and techniques purporting
to quantify intra-articular load, meeting and discussing design
requirements with various manufacturers of potential technology,
and finally bench top testing and evaluating the more plausible
technologies. Despite a substantial volume of published literature
utilizing many of these technologies for this task and similar
measurements in other articular joints (both human and non-human),
none of the existing technologies were found to have the necessary
geometry and/or were capable of taking accurate measurements when
curved to physiologically prevalent radii. These deficiencies in
the existing technologies necessitated the development of an
appropriate method to accurately measure intra-articular pressures.
❧ A new
sensor array intended to accurately and directly measure
both the spatial and temporal distributions of pressures within a
highly curved intra-articular joint was developed and tested. To
evaluate performance of the new
sensor array for application within
intra-articular joints generally, and specifically to fit within
the relatively restrictive space of the lumbar spine facet joint,
geometric constraints of length, width, thickness and
sensor
spatial resolution were evaluated. Additionally, the effects of
sensor array curvature, frequency response, linearity, drift,
hysteresis, repeatability, and total system cost were assessed. ❧
The new
sensor array was approximately 0.6mm in thickness, scalable
to below the nominal 12 mm wide by 15 mm high lumbar spine facet
joint size, offered no inherent limitations on the number or
spacing of the sensors with less than 1.7% cross talk with the
sensors positioned immediately adjacent to one another. No
difference was observed in
sensor performance down to a radius of
curvature of 7 mm and a 0.66±0.97% change in
sensor sensitivity was
observed at a radius of 5.5 mm. The
sensor array had less than 0.07
dB signal loss up to a loading frequency of 5.5 Hz, linearity was
0.58±0.13% full scale…
Advisors/Committee Members: Hedman, ThomasKhoo, Michael C.K. (Committee Chair), McNitt-Gray, Jill L. (Committee Member), Sadhal, Satwindar S. (Committee Member).
Subjects/Keywords: facet; intra-articular pressure; lumbar spine; biomechanics; articular mechanics; joint contact pressure; center of pressure; facet loads; facet force; sensor; sensor design; sensor specifications; sensor validation; in-vitro; cadavers; human
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Welcher, J. B. (2011). Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/650531/rec/1973
Chicago Manual of Style (16th Edition):
Welcher, Judson B. “Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing.” 2011. Doctoral Dissertation, University of Southern California. Accessed March 04, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/650531/rec/1973.
MLA Handbook (7th Edition):
Welcher, Judson B. “Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing.” 2011. Web. 04 Mar 2021.
Vancouver:
Welcher JB. Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing. [Internet] [Doctoral dissertation]. University of Southern California; 2011. [cited 2021 Mar 04].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/650531/rec/1973.
Council of Science Editors:
Welcher JB. Development, validation and testing of a new sensor array
for intra-articular pressure measurement: in-vitro human lumbar
spine intra-articular facet testing. [Doctoral Dissertation]. University of Southern California; 2011. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/650531/rec/1973

Brno University of Technology
19.
Magát, Martin.
Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/36198
► This thesis describes utilization of a nanotechnology in new pressure sensors. Detailed analysis of individual principles are carrying on. And simulations and experimental models of…
(more)
▼ This thesis describes utilization of a nanotechnology in new
pressure sensors. Detailed analysis of individual principles are carrying on. And simulations and experimental models of sensors are developed. More detailed description is provided for new capacitive
pressure sensor, which is manufactured using nanotechnology, including its model and analysis in order to improve its properties. The work deals with the emission
pressure sensor which uses the principle of cold emissions, including analysis comparison of the measured values of the emission current from the applied nanotubes field and analysis to improve emissions performance.
Advisors/Committee Members: Vrba, Radimír (advisor), Hudec, Lubomír (referee), Vlach, Radek (referee).
Subjects/Keywords: Nanotechnologie; senzor tlaku; kapacitní senzor tlaku; studená emise; emisní senzor tlaku.; Nanotechnology; pressure sensor; capacitive pressure sensor; cold emission; field emission pressure sensor.
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Magát, M. (2018). Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/36198
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Magát, Martin. “Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies.” 2018. Thesis, Brno University of Technology. Accessed March 04, 2021.
http://hdl.handle.net/11012/36198.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Magát, Martin. “Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies.” 2018. Web. 04 Mar 2021.
Vancouver:
Magát M. Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/11012/36198.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Magát M. Senzory tlaku využívající moderní nanotechnologie: Pressure Sensors Based on Modern Nanotechnologies. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/36198
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – San Diego
20.
Vishniakou, Siarhei.
Zinc oxide thin film transistor pressure sensors.
Degree: Electrical Engineering (Applied Physics), 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/2zs2b8mt
► We have developed zinc oxide thin film transistors with a unique device architecture that exhibit robust and high-performance pressure sensing while maintaining transparency for next…
(more)
▼ We have developed zinc oxide thin film transistors with a unique device architecture that exhibit robust and high-performance pressure sensing while maintaining transparency for next generation pressure-sensitive touchscreen displays. We systematically studied and optimized the material growth and device fabrication for improved device performance. We then fabricated top and bottom gate TFTs using both top and bottom contact geometries and identified the optimal device architecture to attain high pressure sensitivity while maintaining excellent transistor performance. Simultaneous operation of a single device as a switch and a pressure sensor allows simple integration of sensors into arrays without the addition of external switching elements. The all-solid-state sensors are capable of measuring steady-state pressure and transient pressure variations. The sensing mechanism stems from the piezoelectric characteristics of RF sputtered ZnO. When zinc oxide is used as the channel material in thin film transistors, its piezoelectric property results in a shift of the transistor threshold voltage upon pressure application. This shift causes a modulation of the drain current flowing through the transistor at a steady bias. A linear dependence of the current change with the applied pressure is observed. Our first-generation TFTs together with a readout circuit built on a breadboard allow discrete pressure measurements from a single sensor at a frequency of 2 kHz. We demonstrated the operation of a transparent 8x8 pressure sensor array fabricated on glass, and the integrated system of pressure sensors and actuators for the recording and reproduction of touch. We further advanced our pressure sensors by studying the effects of sputtering gas, substrate temperature, and seeding layer on the ZnO film properties. The second-generation devices achieved an on-off ratio of 105 and allowed us to successfully demonstrate a larger, 16x16 array. We designed a complete system for real-time pressure signal acquisition and display, including read-out electronics, mechanical integration, electrical connections, and display software for signal visualization. We measured the latency of the pressure sensors to be less than 1 ms and the recovery time to be less than 20 ms. The new pressure-sensing technology enables the development of force-sensitive touchscreens that will make possible new mobile applications with a richer user-machine interface.
Subjects/Keywords: Electrical engineering; Physics; Force touch; Pressure sensor; Touchscreen; Transistor; Transparent sensor; Zinc oxide
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vishniakou, S. (2016). Zinc oxide thin film transistor pressure sensors. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/2zs2b8mt
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Vishniakou, Siarhei. “Zinc oxide thin film transistor pressure sensors.” 2016. Thesis, University of California – San Diego. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/2zs2b8mt.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Vishniakou, Siarhei. “Zinc oxide thin film transistor pressure sensors.” 2016. Web. 04 Mar 2021.
Vancouver:
Vishniakou S. Zinc oxide thin film transistor pressure sensors. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/2zs2b8mt.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Vishniakou S. Zinc oxide thin film transistor pressure sensors. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/2zs2b8mt
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington
21.
Varel, Cagdas.
Flexible Packaging for a Wireless Intraocular Pressure Sensor.
Degree: PhD, 2013, University of Washington
URL: http://hdl.handle.net/1773/23519
► This dissertation focuses on the prototype of an intraocular pressure (IOP) sensor as a major step towards building a device that can be permanently implanted…
(more)
▼ This dissertation focuses on the prototype of an intraocular
pressure (IOP)
sensor as a major step towards building a device that can be permanently implanted during cataract surgery. The implantation will proceed through an incision of 2-3 mm using an injector, during which the complete device must be folded into a cross-section of 2 mm × 1 mm. The device uses radio frequency (RF) for wireless power and data transfer. First, a novel device design is introduced. Materials are chosen systematically for the device fabrication. Two fabrication methods, metal-on-elastomer and solder-filled microchannel, are tested for the antenna fabrication and device integration. Results indicate that an antenna resistance below 5 Ω can be achieved using the solder-filled microchannel method. A device fabrication and integration process based on that method is introduced. A device prototype including an antenna, an RF chip and a
pressure sensor is presented. It is assembled on a printed circuit board (PCB) with several circuit components used for testing and calibration. The antenna is fabricated and integrated with the circuit using a fabrication method employing solder-filled microchannels embedded in an elastomer (polydimethylsiloxane, PDMS). The presented method can be used for biocompatible packaging of microsystems and sensors. The prototype is tested for antenna functionality through power and data transfer. The monitoring device is powered at 2.716 GHz from a distance of 1-2 cm. Transferred power is greater than the threshold power required for chip operation. Exposure to RF power is kept below the maximum permissible exposure limit. The backscattered signal is observed in each chip mode to confirm the wireless sensing capability. Structural flexibility of the PDMS-metal-PDMS stack is studied using a mockup device. The effect of applied stress on antenna resistance is monitored in order to evaluate its durability during the implantation process. The flexible antenna can withstand a stress of 33.4 kPa without any electrical disconnection. It did not show a significant increase in electrical resistance after 50 bending cycles. The prototype has undergone electrical tests for the effect of PDMS coating on
pressure sensor and wireless sensing performance. An acceptable increase in
sensor capacitance and
pressure sensitivity is observed after PDMS coating. Wireless
pressure measurement tests showed device operation with a
pressure sensitivity of 16.66 Hz/mm-Hg (0.125 Hz/Pa). Three topics for future work are proposed for converting the prototype into a complete device. First, additional tests for evaluating device performance in an eye-like environment are proposed. They provide a complete characterization of the RF power and data transfer inside the eye. Second, requirements for the next generation of RF chip are stated. Device size will be shrunk by the elimination of surface mount technology (SMT) components and PCB. Third, building a multi-
sensor platform based on the prototype is proposed. Salinity and pH sensors can be added to…
Advisors/Committee Members: Bohringer, Karl F (advisor).
Subjects/Keywords: Implantable sensor; Intraocular pressure sensor; Wireless sensing; Electrical engineering; Biomedical engineering; electrical engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Varel, C. (2013). Flexible Packaging for a Wireless Intraocular Pressure Sensor. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/23519
Chicago Manual of Style (16th Edition):
Varel, Cagdas. “Flexible Packaging for a Wireless Intraocular Pressure Sensor.” 2013. Doctoral Dissertation, University of Washington. Accessed March 04, 2021.
http://hdl.handle.net/1773/23519.
MLA Handbook (7th Edition):
Varel, Cagdas. “Flexible Packaging for a Wireless Intraocular Pressure Sensor.” 2013. Web. 04 Mar 2021.
Vancouver:
Varel C. Flexible Packaging for a Wireless Intraocular Pressure Sensor. [Internet] [Doctoral dissertation]. University of Washington; 2013. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1773/23519.
Council of Science Editors:
Varel C. Flexible Packaging for a Wireless Intraocular Pressure Sensor. [Doctoral Dissertation]. University of Washington; 2013. Available from: http://hdl.handle.net/1773/23519

University of Waterloo
22.
Noguchi, Mamiko.
Examining changes in intradiscal pressure during intervertebral disc herniation.
Degree: 2013, University of Waterloo
URL: http://hdl.handle.net/10012/7963
► Background: Approximately 40% of low back pain cases are attributed to internal disc disruption. Since mechanical loading directly affects intradiscal pressure and the stresses that…
(more)
▼ Background: Approximately 40% of low back pain cases are attributed to internal disc disruption. Since mechanical loading directly affects intradiscal pressure and the stresses that the inner annulus fibrosus experiences, the mechanism that leads to disruption of the inner annulus fibrosus may be linked to changes in intradiscal pressure. Hence, there is a need to examine how intradiscal pressure changes over time during a flexion extension cyclic (FEC) loading protocol known to induce internal disc disruption.
Purpose: 1) To determine whether a bore-screw pressure sensor system could be used as an alternative sensor for measuring intradiscal pressure, and 2) to characterize changes in intradiscal pressure, moments, and axial deformation using a FEC loading protocol.
Study 1 summary: Technical specifications of the bore-screw pressure sensor system were compared to the needle pressure sensor. The error projected at a static compressive load of 1500 N was approximately eight percent and the bore-screw pressure sensor had an excellent dynamic response compared to the needle pressure sensor.
Study 2 methods: The bore-screw pressure sensor system was successfully instrumented in 14 porcine specimens. The FEC loading protocol consisted of 3600 cycles of 1 Hz flexion-extension movement while applying a 1500 N compressive load. The four dependent variables collected were intradiscal pressure, moment, axial deformation, and angular displacement.
Study 2 results: Intradiscal pressure and specimen height decreased by 45 % and 62 %, respectively, and the peak moment increased by 102 % following the FEC loading protocol. There were strong correlations between average intradiscal pressure and both peak moment and average axial deformation. The angle where maximum pressure occurred demonstrated a significant difference after 2700 cycles. There were no sequential changes in pressure difference after 2100 cycles. Twelve out of 14 specimens showed partial herniation (85.7%); however, the injury type was not correlated to the pressure change.
Conclusions: Changes in intradiscal pressure were successfully characterized over time using a new pressure sensor system. Although the change in pressure difference was not predictive of an injury type, its increasing trend over time suggested that the inner annulus fibrosus failure mechanism may be related to fatigue.
Subjects/Keywords: low back pain; intradiscal pressure; internal disc disruption; pressure sensor; injury mechanics; fatigue
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Noguchi, M. (2013). Examining changes in intradiscal pressure during intervertebral disc herniation. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7963
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Noguchi, Mamiko. “Examining changes in intradiscal pressure during intervertebral disc herniation.” 2013. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/7963.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Noguchi, Mamiko. “Examining changes in intradiscal pressure during intervertebral disc herniation.” 2013. Web. 04 Mar 2021.
Vancouver:
Noguchi M. Examining changes in intradiscal pressure during intervertebral disc herniation. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/7963.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Noguchi M. Examining changes in intradiscal pressure during intervertebral disc herniation. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7963
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Kisić Milica.
Heterogeno integrisani pasivni induktivni senzori.
Degree: 2016, University of Novi Sad
URL: https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija14768768291319.pdf?controlNumber=(BISIS)102146&fileName=14768768291319.pdf&id=6982&source=OATD&language=en
;
https://www.cris.uns.ac.rs/record.jsf?recordId=102146&source=OATD&language=en
► U disertaciji je prikazano teorijsko i praktično istraživanje koje se odnosi na projektovanje, fabrikaciju i karakterizaciju heterogeno integrisanih induktivnih senzora za mjerenje sile, pritiska…
(more)
▼ U disertaciji je prikazano teorijsko i praktično istraživanje koje se odnosi na projektovanje, fabrikaciju i karakterizaciju heterogeno integrisanih induktivnih senzora za mjerenje sile, pritiska i pomjeraja. Cilj istraživanja doktorske disertacije je kombinovanje različitih tehnologija izrade i materijala, kako bi se projektovali senzori koji će biti konkurentni aktuelnim rešenjima, i koji bi se mogli koristiti za konkretne primjene. U okviru istraživanja, heterogenom integracijom su kombinovane prednosti tehnologije štampanih ploča (Printed Circuit Board - PCB), fleksibilne tehnologije i tehnologije niskotemperaturne zajedno-pečene keramike (Low Temperature Co-fired Ceramics – LTCC). Razvijena su tri prototipa senzora za mjerenje sile, pritiska i pomjeraja korišćenjem struktura sa induktorom i feritom u njegovoj blizini. Mjerenje realizovanih prototipova senzora vrši se bežično pomoću spregnutog antenskog namotaja. Na osnovu početnih rezultata ispitivanja, senzori su modifikovani u cilju poboljšanja i optimizovanja performansi. Projektovani senzori omogućavaju bežično mjerenje, jeftini su, kompaktni i jednostavni. Na osnovu teorijske analize, simulacija, eksperimetnalnih mjerenja, ustanovljena je ispravnost rada i primjenljivost realizovanih senzora.
In doctoral thesis theoretical and practical investigation on design, fabrication and characterisation of heterogenous integrated inductive sensors for measuring force, pressure and displacement are shown. The aim of the thesis is to investige the usage of different technologies and materials in order to design sensors which will be competitive to actual solutions and usable for specific aplications. Using heterogenous integraton, advantages of Printed Circuit Board technology (PCB), flexible and Low Temperature Co-fired Ceramics (LTCC) technologies are used. Three sensor prototypes for measuring force, pressure and displacement are developed using inductor and ferrite in its near proximity. Measurements of the realised sensor prototypes are wirelessly done using an external surrounding coil as an antenna. Based on the initial measuring results, sensors are redesigned in order to improve and optimize their performance. Projected sensors are low-cost, compact, simple, and enable wireless measurement. The proper operation and applicability of realized sensors are confirmed using theoretical analysis, simulation and experimental testing with presented results.
Advisors/Committee Members: Damnjanović Mirjana, Živanov Ljiljana, Menićanin Aleksandar, Luković Miloljub, Radić Jelena.
Subjects/Keywords: heterogena integracija, senzor sile, senzor pritiska, senzor pomjeraja, bežično mjerenje; heterogenous integration, force sensor, pressure sensor, displacement sensor, wireless measurement
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Milica, K. (2016). Heterogeno integrisani pasivni induktivni senzori. (Thesis). University of Novi Sad. Retrieved from https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija14768768291319.pdf?controlNumber=(BISIS)102146&fileName=14768768291319.pdf&id=6982&source=OATD&language=en ; https://www.cris.uns.ac.rs/record.jsf?recordId=102146&source=OATD&language=en
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Milica, Kisić. “Heterogeno integrisani pasivni induktivni senzori.” 2016. Thesis, University of Novi Sad. Accessed March 04, 2021.
https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija14768768291319.pdf?controlNumber=(BISIS)102146&fileName=14768768291319.pdf&id=6982&source=OATD&language=en ; https://www.cris.uns.ac.rs/record.jsf?recordId=102146&source=OATD&language=en.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Milica, Kisić. “Heterogeno integrisani pasivni induktivni senzori.” 2016. Web. 04 Mar 2021.
Vancouver:
Milica K. Heterogeno integrisani pasivni induktivni senzori. [Internet] [Thesis]. University of Novi Sad; 2016. [cited 2021 Mar 04].
Available from: https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija14768768291319.pdf?controlNumber=(BISIS)102146&fileName=14768768291319.pdf&id=6982&source=OATD&language=en ; https://www.cris.uns.ac.rs/record.jsf?recordId=102146&source=OATD&language=en.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Milica K. Heterogeno integrisani pasivni induktivni senzori. [Thesis]. University of Novi Sad; 2016. Available from: https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija14768768291319.pdf?controlNumber=(BISIS)102146&fileName=14768768291319.pdf&id=6982&source=OATD&language=en ; https://www.cris.uns.ac.rs/record.jsf?recordId=102146&source=OATD&language=en
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Carolina
24.
Zhu, Yihao.
Thin Film Based Biocompatible Sensors for Physiological Monitoring.
Degree: PhD, Electrical Engineering, 2015, University of South Carolina
URL: https://scholarcommons.sc.edu/etd/3072
► The development and evolution of physiological sensors, from wearable to implantable, has enabled long term continuous physiological monitoring, making possible for the out-of-clinic treatment…
(more)
▼ The development and evolution of physiological sensors, from wearable to implantable, has enabled long term continuous physiological monitoring, making possible for the out-of-clinic treatment and management of many chronic illnesses, mental health issues and post-surgery recovery. This technology advance is gradually changing the definition of health care and the way it is delivered, from clinic/emergency room to patient’s own environment. In this dissertation, three general types of sensors have been proposed for physiological monitoring of blood
pressure, oxygen content and electrolyte ion concentration level in human body, respectively. The study proved the device concepts and shows promising results with the prototype sensors for possibilities of various biomedical applications.
In the
pressure sensor development, we have designed, fabricated and characterized a biocompatible, flexible
pressure sensor using Au thin film patterned polydimethylsiloxane (PDMS) membrane for bio-implant application. Strain induced changes in Au film resistance was used to perform quantitative measurement of absolute
pressure. The
sensor was extensively modeled through COMSOL-based finite element simulations for design and performance predication. Three prototype sensors fabricated with different membrane thickness of 50, 100 and 200 μm were studied. Very high constant sensitivities of 0.1 /Kpa, 0.056 /Kpa and 0.012 /Kpa, respectively, were observed over their effective measurement ranges. The high sensitivities are attributed to the formation of microcracks in Au film resistor when the sensors are subjected to
pressure. Interestingly, the formation of microcracks seemed to be quite reversible within certain
pressure range. In addition, the correlation of sensitivity and effective sensing range with membrane thickness was studied for the three sensors. It was found that the device sensitivity increased with the decrease in membrane thickness but at the expense of its effective sensing range. This observation corresponds well to the simulation results. Response times of all the three sensors were found to be in millisecond range, and the best rms noise limited resolution was 0.07 mmHg (9 Pa).
In the oxygen
sensor development, oxygen sensing characteristics of In
2O
3 thin film at room temperature have been investigated through conductivity measurements using interdigitated metal finger patterned devices. We observed that the O
2 sensitivity gets affected very significantly in presence of moisture, as well as with applied dc bias. The O
2 sensitivity was found to increase several times in moist ambient compared to dry ambient condition. Higher dc bias also dramatically improved the sensitivity, which varied more than two orders of magnitude as the dc bias was increased from 0.5 to 10 V. We propose that the observed increase in sensitivity in presence of moisture is caused by enhanced surface electron density on In
2O
3 thin film resulting from the donation of…
Advisors/Committee Members: Goutam Koley.
Subjects/Keywords: Electrical and Computer Engineering; Engineering; thin films; biocompatible sensors; physiological monitoring; pressure sensor; oxygen sensor; ion sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhu, Y. (2015). Thin Film Based Biocompatible Sensors for Physiological Monitoring. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/3072
Chicago Manual of Style (16th Edition):
Zhu, Yihao. “Thin Film Based Biocompatible Sensors for Physiological Monitoring.” 2015. Doctoral Dissertation, University of South Carolina. Accessed March 04, 2021.
https://scholarcommons.sc.edu/etd/3072.
MLA Handbook (7th Edition):
Zhu, Yihao. “Thin Film Based Biocompatible Sensors for Physiological Monitoring.” 2015. Web. 04 Mar 2021.
Vancouver:
Zhu Y. Thin Film Based Biocompatible Sensors for Physiological Monitoring. [Internet] [Doctoral dissertation]. University of South Carolina; 2015. [cited 2021 Mar 04].
Available from: https://scholarcommons.sc.edu/etd/3072.
Council of Science Editors:
Zhu Y. Thin Film Based Biocompatible Sensors for Physiological Monitoring. [Doctoral Dissertation]. University of South Carolina; 2015. Available from: https://scholarcommons.sc.edu/etd/3072

University of Cincinnati
25.
Lohrer, John.
Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor.
Degree: MS, Engineering and Applied Science: Electrical
Engineering, 2017, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035
► Pressure ulcers are a dangerous injury resulting from extensive pressure being applied to the body over a prolonged period of time resulting in a lack…
(more)
▼ Pressure ulcers are a dangerous injury resulting from
extensive
pressure being applied to the body over a prolonged
period of time resulting in a lack of blood flow reaching the
affected site. If the
pressure is not relieved in a timely manner,
the lack of nutrients causes the tissue in the surrounding area to
eventually die and decompose creating an open sore that could
become infected.
Pressure ulcers usually form over areas of the
skin where a boney prominence is closest to the skin, such as the
hips or ankle bones, so subjects who lose a leg and depend on a
prosthetic are at constant risk of developing them due to the
residual leg bone left by the surgery. In addition to this, muscle
mass is reduced in subjects with a lower limb amputation due to
lack of use which brings the bone even closer to the surface of the
skin. If a lower limb amputee does form a
pressure ulcer, they can
no longer rely on their prosthetic for mobility and are reduced to
using crutches, a wheelchair, or are bedridden until the wound
heals.This thesis presents a low cost, high mobility prototype
microcontroller-based
pressure sensor that is capable of detecting
normal and shear forces with the possibility of said
sensor being
integrated into a lower limb prosthetic to detect problem areas of
high
pressure in real time. This information can then alert the
user to a potential problem with their prosthetic allowing them to
take proactive measures to prevent a
pressure ulcer from forming.
The proposed device incorporates an off-the-shelf microcontroller
that serves as the control unit along with flexible analog
piezoresistive sensors. Using the built-in analog-to-digital module
and serial peripheral interface, the device is capable of measuring
and storing approximately 1,000 data points per second and
detecting pressures in the range of 60mmHg to
798mmHg.
Advisors/Committee Members: Beyette, Fred (Committee Chair).
Subjects/Keywords: Electrical Engineering; Shear Force Sensor; Normal Force Sensor; Prosthetic; Pressure Ulcer; Lower Limb Amputee; Piezoresistive Sensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lohrer, J. (2017). Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035
Chicago Manual of Style (16th Edition):
Lohrer, John. “Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor.” 2017. Masters Thesis, University of Cincinnati. Accessed March 04, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035.
MLA Handbook (7th Edition):
Lohrer, John. “Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor.” 2017. Web. 04 Mar 2021.
Vancouver:
Lohrer J. Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor. [Internet] [Masters thesis]. University of Cincinnati; 2017. [cited 2021 Mar 04].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035.
Council of Science Editors:
Lohrer J. Smart Prosthetic for Lower Limb Amputees Utilizing a Novel
Shear and Normal Force Sensor. [Masters Thesis]. University of Cincinnati; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035

Indian Institute of Science
26.
Singh, Jaspreet.
Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement.
Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/3132
► Now-a-days sensors are not limited only to industry or research laboratories but have come to common man’s usage. From kids toys to house hold equipment…
(more)
▼ Now-a-days sensors are not limited only to industry or research laboratories but have come to common man’s usage. From kids toys to house hold equipment like washing machine, microwave oven as well as in automobiles, a wide variety of sensors and actuators can be easily seen.
The aim of the present thesis work is to discuss the design, development, fabrication and testing of miniaturized piezoresistive, absolute type, low
pressure sensor and flow
sensor. Detailed performance study of these sensors in different ambient conditions (including harsh environment such as radiation, temperature etc.) has been reported. Extensive study on designing of thin silicon diaphragms and optimization of piezoresistor parameters is presented. Various experiments have been performed to optimize the fabrication and packaging processes.
In the present work, two low range absolute type
pressure sensors (0-0.5 bar and 0-1 bar) and a novel flow
sensor (0-0.1 L min-1) for gas flow rate measurement are developed. The thesis is divided into following six chapters.
Chapter 1:
It gives a general introduction about miniaturization, MEMS technology and its applications in sensors area. A brief overview of different micromachining techniques is presented, giving their relative advantages and limitations. Literature survey of various types of MEMS based
pressure sensors along with recent developments is presented. At the end, the motivation for the present work and organization of the thesis is discussed.
Chapter 2:
In this chapter, various design aspects of low, absolute type
pressure sensors (0-0.5 bar and 0-1 bar) are discussed in detail. Static analysis of the silicon diaphragms has been carried out both analytically as well as through finite element simulations. Piezoresistive analysis is carried out to optimize the piezoresistor dimensions and locations for maximum sensitivity and minimum nonlinearity. All the Finite Element Analyses (FEA) were carried out using Coventorware software. A novel approach for the selection of resistor parameters (sheet resistance, length to width ratio) is reported . Finally, the expected performance of the designed sensors is summarized.
Chapter 3:
This chapter is divided into two parts. The first part presents the fabrication process flow adopted to develop these low range absolute
pressure sensors. Two fabrication process approaches (wet etching and dry etching) which are used to fabricate the thin diaphragms are discussed in detail. Following an overall description, various aspects of the fabrication are elaborated on, like mask design, photolithography process, ion-implantation, bulk micromachining and wafer bonding. The required parameters for implantation doses, annealing cycles, low stress nitride deposition and anodic bonding are optimized through extensive experimental trials.
The second part of this chapter discusses about the different levels of packaging involved in the realization of
pressure sensors. Finite Element Analyses (FEA) of Level -0 and Level-1 packages has been carried out using…
Advisors/Committee Members: Rajanna, K (advisor).
Subjects/Keywords: Micromachined Pressure Sensors; Micromachined Flow Sensors; Microelectromechanical Sensors; MEMS Pressure Sensors; Micromachining; Piezoresistivity; Piezoresistive Pressure Sensors; Semiconductor Sensors; Micromachined Sensors; Pressure Sensors; Flow Sensors; MEMS Sensor; Silicon Pressure Sensors; Instrumentation
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Singh, J. (2018). Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3132
Chicago Manual of Style (16th Edition):
Singh, Jaspreet. “Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed March 04, 2021.
http://etd.iisc.ac.in/handle/2005/3132.
MLA Handbook (7th Edition):
Singh, Jaspreet. “Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement.” 2018. Web. 04 Mar 2021.
Vancouver:
Singh J. Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Mar 04].
Available from: http://etd.iisc.ac.in/handle/2005/3132.
Council of Science Editors:
Singh J. Design, Development and Performance Analysis of Micromachined Sensors for Pressure and Flow Measurement. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3132

UCLA
27.
Tan, Robert.
The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors.
Degree: Biomedical Engineering, 2012, UCLA
URL: http://www.escholarship.org/uc/item/5c4777ss
► There has been a push to modernize the technology used in patient monitoring. One area that is being investigated is the use of in situ…
(more)
▼ There has been a push to modernize the technology used in patient monitoring. One area that is being investigated is the use of in situ sensors for real time, continuous vital signs monitoring, particularly to measure pressure. We developed two sensors fulfilling different roles. One is fully implantable and wireless for long term urological pressure monitoring using conventional MEMS technology. This sensor required the use of a battery-powered wireless transmitter. The second sensor utilizes an entirely new method of pressure sensing designed to be easily scaled down in size while being extremely cost effective. By using an electrolyte solution-filled elastic tube, the sensor does not require further packaging; also the materials used are easily obtainable commercially, so no custom components are required even when downsizing. Although initially designed and tested as a wired sensor, the new catheter sensor was designed to be integrated with wireless capability later – to create a truly minimally invasive long term pressure monitor. Both pressure sensing systems were developed by fabricating a pressure sensitive catheter lead, designing the electronics required to amplify and filter the sensor signal, programming the software client that received, stored, graphed, and interpreted the data. Furthermore, both sensors were subjected to extensive in vitro testing to characterize sensor performance and lifetime, as well as simulate an in vivo environment. Both sensors required the investigation of robust packaging techniques to ensure functionality and survivability while implanted. Last, both sensors demonstrated their potential use as a pressure monitor in animal studies: within the bladder for the wireless implantable sensor and as an intravascular sensor for the new conductometric design.
Subjects/Keywords: Biomedical engineering; Medicine; Electrical engineering; Arterial; Catheter; Implantable; Pressure; Sensor; Wireless
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tan, R. (2012). The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/5c4777ss
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tan, Robert. “The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors.” 2012. Thesis, UCLA. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/5c4777ss.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tan, Robert. “The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors.” 2012. Web. 04 Mar 2021.
Vancouver:
Tan R. The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors. [Internet] [Thesis]. UCLA; 2012. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/5c4777ss.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tan R. The Development of Short and Long Term Continuous and Real Time In Situ Medical Pressure Sensors. [Thesis]. UCLA; 2012. Available from: http://www.escholarship.org/uc/item/5c4777ss
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah
28.
Huang, Wenjie.
Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer.
Degree: MS, Chemical Engineering, 2011, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/622/rec/2846
► The rotational rheometer (cone-and-plate or parallel plates rheometer) is one of the most effective devices for measuring rheological properties of the viscoelastic liquid: the viscosity…
(more)
▼ The rotational rheometer (cone-and-plate or parallel plates rheometer) is one of the most effective devices for measuring rheological properties of the viscoelastic liquid: the viscosity (?), the first normal stress difference (N?). However, it has been found practically that some errors were potentially associated with this type of rheometer: The “axial compliance error” is due to the use of linear-variable-displacement-transducer (LVDT) for first normal stress (N?) measurement, and it is potentially significant in the time-dependent material response measurement. Secondly, the low natural frequencies of sensitive LVDT springs fail in recording the high frequency response of a material. Lastly, misalignment of the sample holder (cone and plate) will change the geometry of the sample. These errors were quantified by performing rheology studies with the LVDT detached and a novel device fabricated with Micro-Electronic-Machining-System (MEMS) technique. The device is a pressure sensor plate of 25mm in diameter. It contains eight miniature capacitive pressure sensors, allowing measurements of the radical pressure profile, from which both the first normal stress (N?) and the second normal stress (N?) can be calculated. The apparent response time of N? to start-up of NIST-1490 shear flow was measured. The apparent response time was longer being measured with the LVDT than being measured with the pressure sensor plate, indicating that significant axial compliance errors were present during LVDT measurements. The natural frequency of the LVDT was lower than the high frequency behavior of the tested fluid NIST-1490. A slight cone-plate misalignment, smaller than the manufacturer?s suggested limit, developed a sinusoid-shaped radical pressure profile of the Poly(dimethylsiloxane) (PDMS), corresponding to the axial plane of the tilt. However, this misalignment error can be reduced significantly by averaging the pressure profiles over clockwise and counterclockwise rotation manners. With the pressure sensor plate, the normal stress ratio, ¥= - N?, was measured to be 0.189 for PDMS. ? N?
Subjects/Keywords: Measurement errors; Pressure sensor plate; Second normal stress; Torsional rheometer
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huang, W. (2011). Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/622/rec/2846
Chicago Manual of Style (16th Edition):
Huang, Wenjie. “Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer.” 2011. Masters Thesis, University of Utah. Accessed March 04, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/622/rec/2846.
MLA Handbook (7th Edition):
Huang, Wenjie. “Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer.” 2011. Web. 04 Mar 2021.
Vancouver:
Huang W. Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer. [Internet] [Masters thesis]. University of Utah; 2011. [cited 2021 Mar 04].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/622/rec/2846.
Council of Science Editors:
Huang W. Use of a novel micro-electronic-machining-system pressure sensor plate to evaluate the measurement errors of a standard torsional rheometer. [Masters Thesis]. University of Utah; 2011. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/622/rec/2846

University of Michigan
29.
Kim, Youngwoo.
Micropillar Arrays for High Sensitivity Sensors.
Degree: PhD, Mechanical Engineering, 2016, University of Michigan
URL: http://hdl.handle.net/2027.42/133436
► In this thesis, a soft and sensory skin-like electronic structure is developed. A capacitance-type pressure sensor is developed that is not only flexible but also…
(more)
▼ In this thesis, a soft and sensory skin-like electronic structure is developed. A capacitance-type
pressure sensor is developed that is not only flexible but also stretchable, has a wide sensing regime (up to 10 kPa), and high sensitivity (0.34 kPa-1). Micropillar
sensor arrays inspired by cilia structures found in nature are fabricated using a soft nanolithography technique and electroded with sputtered gold. The arrays are configured for capacitance type
pressure sensing in the tactile – touch regime. Several designs are proposed, fabricated, and evaluated to optimize sensitivity and detectability in the low
pressure range. Techniques for fabricating asymmetric easy to buckle pillar structures and a multi-level hierarchical design platform are developed. Here, we present the highest reported sensitivity [0.34 kPa-1] of a passive capacitance type
sensor that is both flexible and stretchable. There is experimental evidence to suggest that the
sensor can be configured to detect very low pressures, and or used for proximity sensing.
The influence of pillar design parameters on
sensor performance is explored using experimental and computational simulation techniques. The relationship between different pillar deformation modes and
sensor characteristics is established and quantified. Computational simulations are carried out in COMSOL to investigate how large conformational changes of the pillars during deformation influence the capacitance readings for the different
sensor designs. The simulations are an important tool in solving coupled multiphysics problems and for visualizing complex nonuniform three dimensional electrostatic fields. The simulation results show identical trends to the experiments and excellent correlation is achieved for the full device model. Finally, the microstructured
sensor array naturally lends itself to the development of pixel-type
pressure sensors and biomedical monitoring devices – the potential for both applications are demonstrated here.
Advisors/Committee Members: Goulbourne, Nakhiah C (committee member), Wineman, Alan S (committee member), Inman, Daniel J (committee member), Pan, Jwo (committee member).
Subjects/Keywords: Soft materials; Capacitive sensor; Pressure sensing; Microstructure; Mechanical Engineering; Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kim, Y. (2016). Micropillar Arrays for High Sensitivity Sensors. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/133436
Chicago Manual of Style (16th Edition):
Kim, Youngwoo. “Micropillar Arrays for High Sensitivity Sensors.” 2016. Doctoral Dissertation, University of Michigan. Accessed March 04, 2021.
http://hdl.handle.net/2027.42/133436.
MLA Handbook (7th Edition):
Kim, Youngwoo. “Micropillar Arrays for High Sensitivity Sensors.” 2016. Web. 04 Mar 2021.
Vancouver:
Kim Y. Micropillar Arrays for High Sensitivity Sensors. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2027.42/133436.
Council of Science Editors:
Kim Y. Micropillar Arrays for High Sensitivity Sensors. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/133436
30.
Ali, Syyed Asad.
Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -.
Degree: Physics, 2008, Aligarh Muslim University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/17958
None
Bibliography and Appendix included
Advisors/Committee Members: Naquvi, S.Alim H..
Subjects/Keywords: Physics; Pressure Sensor=; Polymeric; Swift
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ali, S. A. (2008). Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -. (Thesis). Aligarh Muslim University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17958
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ali, Syyed Asad. “Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -.” 2008. Thesis, Aligarh Muslim University. Accessed March 04, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/17958.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ali, Syyed Asad. “Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -.” 2008. Web. 04 Mar 2021.
Vancouver:
Ali SA. Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -. [Internet] [Thesis]. Aligarh Muslim University; 2008. [cited 2021 Mar 04].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17958.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ali SA. Characterization of Swift Heavy Ion Induced Modification
in Polymeric Materials Vacuum Sealed Absolute Micro Pressure
Sensor; -. [Thesis]. Aligarh Muslim University; 2008. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17958
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] [4] [5] [6] [7] ▶
.