Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 133 for “"pressure sensors"”.
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Dynamic pressure sensors for hypersonic flow measurements
… on the research and development of an acoustic pressure sensor tailored for hypersonic boundary layer flow measurements. Hypersonic boundary layer flows comprise shocks, laminar-to-turbulent transitions, and high-frequency turbulence with small (sub 1-mm) characteristic length scales. …
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Signal Conditioning Circuits for Injectable Pressure Sensors
The pressure at different organs is highly regulated in the human body, which is a key indicator of health in many chronic conditions. Monitoring these pressures remotely and precisely provides useful information for managing health and treating disease. To measure these pressures, less invasive …
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Bioresorbable intracranial pressure sensors for clinical applications
Made available in DSpace on 2018-09-04T20:47:21Z (GMT). No. of bitstreams: 3 SHIN-DISSERTATION-2018.pdf: 10706149 bytes, checksum: 076b7d36ec3e32d13b604e1d8770232d (MD5) LICENSE.txt: 4206 bytes, checksum: 05000b2b1391da56c8d3b9fbd561a96c (MD5) PROQUEST_LICENSE.txt: 4552 bytes, checksum: …
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Integrated silicon pressure sensors using wafer bonding technology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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High Temperature High Bandwidth Fiber Optic Pressure Sensors
Pressure measurements are required in various industrial applications, including extremely harsh environments such as turbine engines, power plants and material-processing systems. Conventional sensors are often difficult to apply due to the high temperatures, highly corrosive agents or …
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Self-Calibrated Interferometric/Intensity-Based Fiber Optic Pressure Sensors
… of providing robust and reliable fiber optic pressure sensors capable of operating in harsh environments, this dissertation presents the detailed research work on the design, modeling, implementation, analysis, and performance evaluation of the novel fiber optic self-calibrated …
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Design and development of new pressure sensors for aerodynamic applications
… the first years a project regarding Capacitive Pressure Sensors Array for Aerodynamic Applications was developed in the Applied Aerodynamic research team of the Second Faculty of Engineering, University of Bologna, Forlì, Italy, and in collaboration with the ARCES laboratories of the same …
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Touch at a distance : underwater object identification using pressure sensors
… dexterously in complex environments. Similarly, pressure sensors could be used on underwater vehicles to expand their range of operability by filling the gap left by sonar and vision systems in turbid cluttered environments. To understand how much information can be extracted from the artificial …
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Generating Low-Pressure Shock Waves for Calibrating High-Frequency Pressure Sensors
Measurements of hypersonic boundary-layer instabilities have recently been performed
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On the Improvement of Positioning in LTE with Collaboration and Pressure Sensors
… is studied through the use of barometric pressure sensors in mobile handsets. Finding the third dimension of location, or the correct height above the ground level which equates to the floor in a building that a UE is on, cannot be performed with two-dimensional measurement models. For …
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Integration of electronic and optical techniques in the design and fabrication of pressure sensors
… systems fabrication methods, piezoresistive pressure sensors have become the more popular pressure transducers. They dominate pressure sensor commercialization due to their high performance, stability and repeatability. However, increasing demand for harsh environment sensing devices has made …
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Development of a porous piezoresistive material and its applications to underwater pressure sensors and tactile sensors
MEMS (Microelectromechanical System) pressure sensor arrays are gaining attention in the field of underwater navigation because they are seen as alternatives to current sonar and vision-based systems that fail to navigate unmanned undersea vehicles (UUVs) in dark, unsteady and cluttered …
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Estimation of the In-Cylinder Air/Fuel Ratio of an Internal Combustion Engine by the Use of Pressure Sensors
This thesis investigates the use of cylinder pressure measurements for estimation of the in-cylinder air/fuel ratio in a spark ignited internal combustion engine. An estimation model which uses the net heat release profile for estimating the cylinder air/fuel ratio of a spark ignition engine is …
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Robust design evolution and impact of In-Cylinder Pressure Sensors to combustion control and optimization : a systems and strategy perspective
In-Cylinder Pressure Sensors (ICPS) today are close to satisfying the robustness, performance and cost requirements for application to closed loop control and monitoring of production automotive engines. Using the Robust Design framework as a compass, this thesis first checks the evidence for …
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Design and fabrication of a MEMS-array pressure sensor system for passive underwater navigation inspired by the lateral line
An object within a fluid flow generates local pressure variations that are unique and characteristic to the object's shape and size. For example, a three-dimensional object or a wall-like obstacle obstructs flow and creates sharp pressure gradients nearby. Similarly, unsteady flow contains vortical …
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Fibre optic pressure sensor for downhole monitoring in the oil industry
… average for North Sea oil-wells.<br/>Fibre-optic sensors have the potential to measure many downhole parameters. However, high-temperature, high-pressure (HTHP) fluids are shown to have adverse effects on fibre pressure-sensors and cables. All unprotected, silica-fibre, pressure sensors drift in …
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Evaluation of Textile Force-Sensitive Resistors in Quantifying Athletic Shoe Fit
… research studies for measuring shoe-foot contact pressures with plastic thin-film pressure sensors and using this to successfully quantify shoe fit. However, the physical properties of plastic thin-film sensors are limited and the testing procedure for the sensors used in the studies does not …
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bio-inspired attitude control of micro air vehicles using rich information from airflow sensors
… moment profiles using a limited number of micro pressure sensors over a straight wing. Then, we designed a robust pitching controller using 20 micro pressure sensors and tested the closed-loop performance in a simulated environment. Additionally, a straight wing was designed for the pressure …
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Silicon piezoresistors for MEMS pressure sensor applications
… including a range of physical and environmental sensors. Pressure sensors are used for a wide range of monitoring and control applications, e.g. environmental, industrial, aircraft, automotive. Monitoring of vehicle tyre pressures offers benefits such as improved safety, fuel economy, and tyre …
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Dynamic Pressure Sensing for the Flight Test Data System
… data acquisition capability for up to two pressure sensors and an additional three low-frequency pressure sensors. Development of the FTDS-K was separated into a core module, specialized analog subsystem, and practical testing of the FTDS-K in a flow measurement mission. The core module …
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