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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 80 for “"Pressure Transducers"”.
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Using Pressure Transducers for Noninvasive Heart and Respiratory Monitoring
… heart and respiratory monitor (HARMONI). It uses pressure transducers and medical tubing placed on a person's chest. The tubing is plugged off at one end, and then attached to a pressure transducer at the other end. The transducer sees spikes in voltage whenever the pressure inside the tubing …
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Use of electrical pressure transducers to measure soil pressure.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1966. M.S.
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Microfabricated pressure transducers based on anti-resonant reflecting optical waveguides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Overcoming Thermal Challenges to Acquire Absolute Pressure Measurements in Rotating Detonation Engines Using Piezoresistive Pressure Transducers
Presently, piezoelectric (PE) pressure transducers in a recessed configuration are used to acquire the time-varying pressure in rotating detonation engines (RDEs). In addition, the capillary tube averaged pressure (CTAP) configuration with a low-frequency transducer is used to obtain the …
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Void fraction measurements in large (0.3 m) diameter bubble column using Wire Mesh Sensor and Pressure transducers- Effect of sparger
… using Wire Mesh Sensor (WMS) tomography and Pressure Transducers. Pair of WMS sensors, with a 64×64 wire configuration of each sensor, were installed which are separated by a distance along the axis of the bubble column. Wire Mesh Sensors and PTs Data were collected for time-averaged and …
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Void fraction measurements in a large (0.3 m) diameter bubble column using Wire Mesh Sensors and Pressure Transducers: Effect of Spargers
… using Wire Mesh Sensor (WMS) tomography and Pressure Transducers. Pair of WMS sensors, with a 64×64 wire configuration of each sensor, were installed which are separated by a distance along the axis of the bubble column. Wire Mesh Sensors and PTs Data were collected for time-averaged and …
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GAS HOLD-UP MEASUREMENTS IN 0.3 m DIAMETER BUBBLE COLUMN: EFFECT OF ELECTROLYTES
… column using a pair of Wire Mesh Sensors and six pressure transducers.</p>
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Development of a data reduction method for a high frequency angle probe
… tunnels. The probe measures time-resolved total pressure, static pressure, angle of attack, and yaw angle from readings of four pressure transducers. The unique feature of this probe, as compared to a conventional multi-hole directional probe, is that the four high frequency response silicon …
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Roll pressure distribution in strip rolling.
The determination of the pressure distribution generated along the arc of contact between the rolls and workpiece during the rolling process has been a subject of interest to researchers for many years. Existing rolling theories make assumptions and include simplifications which are not often …
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Shock wave interaction in a tee junction
… and instrumented with three piezoelectric pressure transducers and two hot wire anemometers. Tests were run in air for a Mach number range of 1.5 to 3.0, the different pressure ratios being obtained by varying the degree of vacuum in the driven section of the shock tube. A shock diffraction …
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A microprocessor based air pressure controller
A microprocessor based air pressure controller is discussed. The particular implementation was designed around an existing pressure measurement, and display unit. The unit is controlled by a 6809 microprocessor. It is shown that due to the many functions that the unit must perform and control, a …
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A Computational Approach For Investigating Unsteady Turbine Heat Transfer Due To Shock Wave Impact
… blades was established, a single shock with a pressure ratio of 1.1 was introduced into the wind tunnel test section. A single blade was equipped with pressure transducers and heat flux microsensors. As the shock wave strikes the blade, time resolved pressure, temperature, and heat transfer …
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On the Statistical Nature of Boiling Flows - an Experimental Approach
… were used. Two flow-field variables, viz. static pressure fluctuations at the test section outer wall and instantaneous chordal-average vapor fraction, were studied. Matched piezo-electric pressure transducers were used for the pressure fluctuation measurements, and a linearized dual-beam x-ray …
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The `Electric' Pascal: Absolute and Dynamic Calibration Techniques
This article describes a pressure generation technique that has been applied to the task of calibrating hydraulic pressure transducers. The technique combines principles given by the Lorentz Force and Faraday's Law of Induction to generate a hydrostatic pressure within a cavity. The time history of …
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Fiber Optic Sensing of Strain and Temperature for Structures in a Hypersonic Flow
… of the plenum box, and the generated backpressure influenced the (acoustic) stiffness of the system. A variety of testing conditions were studied, and 19 experiments were conducted at Mach 6 flow speed. The following parameters were varied in the experiments: fin angle, plenum …
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The Hydrology of a Sandur-Wetland in a Volcanic Environment, Southeast Iceland
… 2016. Water wells along transects coupled with pressure transducers monitored the water table response across this sandur-wetland landscape. Additional geomorphic and climatic data were also collected at this site in order to better understand the sandurs response to both seasonal and episodic …
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Particle-wall shear stress measurements within the standpipe of a circulating fluidized bed
… important forces are the gas and solids phase pressure drop, weight of the bed, and the particle-wall shear stress. Gas pressure drop is measured using differential pressure transducers. The weight of the bed is assumed constant. The wall shear stress is measured utilizing instruments developed …
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Investigation Of Pressure Fluctuations In The Hyporheic Zone In Response To Flow Around A Hydraulic Structure
… interface. This study maps hyporheic pressure fluctuations as they are related to surface water velocity. The pressure map is used to evaluate lift enhancement and destabilization forces on the riverbed. High pressure events in the subsurface help generate a destabilizing force from …
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Angiogenesis and Myogenesis in a Chronic Ischemic Heart.
… 4, Ischemia + Cells. Sonomicrometry and Millar pressure transducers were used to determine contractility, left ventricular pressure, and pressure-volume loops. There were no significant differences (p<0.05)among the hemodynamic data except for Group 4, which produced significantly lower output …
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Effect of inlet strut length on the stalling characteristics of an axial-flow compressor
… stationary and six blade-mounted high-response pressure transducers, and from a circumferentially- traversed directional probe. The distorted inlet flow field was changed significantly by the longer struts, which effectively sectored the inlet. Deep stall was not observed for this configuration. …
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