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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 50 for “"Pressure Transducer"”.
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Characterization, Modeling of Piezoelectric Pressure Transducer for Facilitation of Field Calibration
… calibration technique concerning piezoelectric pressure sensor to reduce cost and improve reliability. This paper summarizes the algorithm used to characterize and develop a model for a piezoelectric pressure transducer. The basic concept of the method is to excite the sensor using an electric …
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The Measurement of Maximal Bite Force in Human Beings
… bite force on the most commonly-used force transducers is problematic. It is often believed that this is related mainly to discomfort and the fear of breaking teeth. Objectives: The aim of the project was to compare the suitability of different bite force measuring transducers including ones …
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Groundwater and Tidal Controls on Wetland Hydrology, Julie J. Metz Wetland Mitigation Bank, Woodbridge, Virginia
… of steep slopes along the sides of the valley. Pressure transducer data from five monitoring wells along a transect across Pod 3 were used to generate hydrographs, create groundwater flow maps, calculate hydraulic conductivity (K<sub>sat</sub>) by performing slug tests, and calibrate wetland …
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Crossflow instability and transition on a circular cone at angle of attack in a Mach-6 quiet tunnel
… crossflow waves were measured with Kulite pressure transducers under both noisy and quiet flow. The wave properties agreed well with computations by Texas A&M and experiments by TU Braunschweig under similar conditions. The amplitude of the waves was reduced by approximately 20 times when …
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Ανάπτυξη ανεμογενών κυματισμών. Επεξεργασία μετρήσεων και μαθηματικά μοντέλα πρόγνωσης
… WAVE DATA WERE COLLECTED IN THRACE SEA USING A PRESSURE TRANSDUCER GAUGE. THE ANALYSIS OF THE WAVE DATA IS MADE WITH THE FAST FOURIER TRANSFORM (FFT). THE MATHEMATICAL SIMULATION OF THE PHENOMENON CONSISTSOF SOLVING NUMERICALLY THE DIFFERENTIAL EQUATION OF WAVE ENERGY BALANCE. THE FORMATION OF A …
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Spirometer techniques for measuring molar composition in argon carbon dioxide mixtures
… of a spirometer. A spirometer is high precision pressure transducer which measures the speed of sound in a gas through the emission and reception of ultrasonic pulses, commonly used in medicine to measure patient lung capacity. The spirometer was successfully calibrated to measure gas composition …
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Stress-density relationships for an agricultural soil
… under high loading rates and different confining pressures simulate the multi-pass effect of a tractor wheel loading on the soil. A volume measuring technique was developed to be used in triaxial tests conducted under high loading rates. A sandy clay agricultural soil was tested under …
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The Design and Evaluation of a High Frequency Fore-Aft Probe
… when the flow was aligned with the upstream pressure transducer. Thus, it can be used to determine the onset of surge and stall. However, the probe was found to be extremely sensitive to off-axis flows. Design improvements are suggested in order to increase its capabilities.
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Emissions and in-cylinder combustion characteristics of Fischer-Tropsch and conventional diesel fuels in a modern CI engine
… 300 diesel engine, outfitted with an in-cylinder pressure transducer, was subjected to a subset of the Euro III 13-mode test cycle under steady-state operating conditions.
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Hydrodynamics of trickle bed reactors (TBRS) packed with industrial catalyst using advanced measurement techniques
… techniques of high-frequency differential pressure transducer and load cell. Two different reactor sizes of bench and pilot plant scale were used. Bench-scale TBR carried out the experiments to assess phase distribution and catalyst utilization with 1.18 cm inside diameter and 72 cm length …
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Development of a system to measure marine turbulence
Various transducers have been developed turbulent shear in the ocean. The airfoil probe with it's piezoceramic beam encapsulated in a rubber airfoil has the simplest electronic processing system. However, the beam is very fragile and displays unpredictable thermal effects. An airfoil probe with …
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Noise transmission path identification in a reciprocating freon compressor
… path identification. A mix of force gages, pressure transducers, and an accelerometer were installed to identify the main transmission paths. Triaxial force gages were installed and calibrated to measure the three forces transmitted from each suspension spring to the shell. The three …
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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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Blast diagnostic tools and techniques: a review
Pressure measurements are essential in determining the energy output from shock waves generated by high explosives. Thus, it is imperative to choose appropriate sensors and measurement techniques to consistently acquire useful data. Past studies conducted in diagnostics of energetic materials were …
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Impact of vertical internals on the hydrodynamics and heat transfer coefficient in a gas-solid fluidized bed
… hydrodynamic characteristics, flow regime, pressure drop, and heat transfer in a 0.14 m inside diameter gas-solid fluidized bed column of. Two sizes of vertical internal tube bundles (0.0127 and 0.0254 m) of circular arrangement have been implemented to represent the heat exchange tubes …
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Estudo experimental de um termo-oscilador para bombeamento de líquidos
… factors that influence the performance. Transducer and electronic circuits were developed to register the liquid level in the U-tube and the deslocations of the admission and discharge valves.The temperatures and pressure of the gas was obtained using termocouples and a pressure …
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Ambulatory Sub-Bandage Pressure Assessment: Background and implementation
… monitoring of ambulatory sub-bandage interface pressures, on healthy volunteers and patients, as the basis for more in-depth future studies.<br/><br/>The projected study required a literature review concerning the socio-economic aspects, aetiology and healing methods (focusing on compression …
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Ensaios contínuos de penetração de cone na argila cinza mole do Rio de Janeiro
… by the Author, provided with an electrical pressure transducer. After the description of the calibration procedures a discussion is made on reliability of the readings with the aid of statistical methods. Then, the thesis is focused on the field tests, the adopted procedures, the methods for …
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Influence of Compressible Aerogel Electrodes on the Properties of an Electrochemical Cell
… the biomedical field the need for intra organ pressure measurement can only be facilitated by adapting existing pressure sensing technology to the specific tissues under test. The customization of these sensors has only driven up cost and the need to explore new technologies has become …
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