A Dual-Mode Thickness-Shear Quartz Pressure Sensor for High Pressure Applications

A pressure sensor in the range of 0–120 MPa with a square diaphragm was designed and fabricated, which was isolated by the oil-filled package. The nonlinearity of the device without circuit compensation is better than 0.4%, and the accuracy is 0.43%. This sensor model was simulated by ANSYS software. Based on this model, we simulated the output voltage and nonlinearity when piezoresistors locations change. The simulation results showed that as the stress of the longitudinal resistor (RL) was increased compared to the transverse resistor (RT), the nonlinear error of the pressure sensor would first decrease to about 0 and then increase. The theoretical calculation and mathematical fitting were given to this phenomenon. Based on this discovery, a method for optimizing the nonlinearity of high-pressure sensors while ensuring the maximum sensitivity was proposed. In the simulation, the output of the optimized model had a significant improvement over the original model, and the nonlinear error significantly decreased from 0.106% to 0.0000713%.

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A Fluidic-Based High-Pressure Sensor Interrogated by Microwave Fabry–Perot Interferometry

IEEE Sensors Journal ◽

10.1109/jsen.2017.2712684 ◽

2017 ◽

Vol 17 (14) ◽

pp. 4388-4393 ◽

Cited By ~ 6

Author(s):

Wenge Zhu ◽

Baokai Cheng ◽

Yurong Li ◽

Runar Nygaard ◽

Hai Xiao

Keyword(s):

High Pressure ◽

Pressure Sensor ◽

Fabry Perot

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Stress and temperature compensated orientations for thickness-shear langasite resonators for high temperature and high pressure environment

2014 IEEE International Ultrasonics Symposium ◽

10.1109/ultsym.2014.0018 ◽

2014 ◽

Author(s):

Mihir S Patel ◽

Bikash K. Sinha

Keyword(s):

High Pressure ◽

High Temperature ◽

Thickness Shear ◽

High Pressure Environment

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A Manganin Thin Film Ultra-High Pressure Sensor for Microscale Detonation Pressure Measurement

Sensors ◽

10.3390/s18030736 ◽

2018 ◽

Vol 18 (3) ◽

pp. 736 ◽

Cited By ~ 6

Author(s):

Guodong Zhang ◽

Yulong Zhao ◽

Yun Zhao ◽

Xinchen Wang ◽

Xueyong Wei ◽

...

Keyword(s):

Thin Film ◽

High Pressure ◽

Pressure Sensor ◽

Pressure Measurement ◽

Detonation Pressure ◽

Ultra High Pressure

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First Unsteady Pressure Measurements With a Fast Response Cooled Total Pressure Probe in High Temperature Gas Turbine Environments

Volume 3: Controls, Diagnostics and Instrumentation; Cycle Innovations; Marine ◽

10.1115/gt2010-23630 ◽

2010 ◽

Cited By ~ 2

Author(s):

Mehmet Mersinligil ◽

Jean-Franc¸ois Brouckaert ◽

Julien Desset

Keyword(s):

High Pressure ◽

Pressure Sensor ◽

Total Pressure ◽

Fast Response ◽

Design Stage ◽

Absolute Pressure ◽

Pressure Probe ◽

Probe Design ◽

Flame Tube ◽

Blade Passing Frequency

This paper presents the first experimental engine and test rig results obtained from a fast response cooled total pressure probe. The first objective of the probe design was to favor continuous immersion of the probe into the engine to obtain time series of pressure with a high bandwidth and therefore statistically representative average fluctuations at the blade passing frequency. The probe is water cooled by a high pressure cooling system and uses a conventional piezo-resistive pressure sensor which yields therefore both time-averaged and time-resolved pressures. The initial design target was to gain the capability of performing measurements at the temperature conditions typically found at high pressure turbine exit (1100–1400K) with a bandwidth of at least 40kHz and in the long term at combustor exit (2000K or higher). The probe was first traversed at the turbine exit of a Rolls-Royce Viper turbojet engine, at exhaust temperatures around 750 °C and absolute pressure of 2.1bars. The probe was able to resolve the high blade passing frequency (≈23kHz) and several harmonics up to 100kHz. Besides the average total pressure distributions from the radial traverses, phase-locked averages and random unsteadiness are presented. The probe was also used in a virtual three-hole mode yielding unsteady yaw angle, static pressure and Mach number. The same probe was used for measurements in a Rolls-Royce intermediate pressure burner rig. Traverses were performed inside the flame tube of a kerosene burner at temperatures above 1600 °C. The probe successfully measured the total pressure distribution in the flame tube and typical frequencies of combustion instabilities were identified during rumble conditions. The cooling performance of the probe is compared to estimations at the design stage and found to be in good agreement. The frequency response of the probe is compared to cold shock tube results and a significant increase in the natural frequency of the line-cavity system formed by the conduction cooled screen in front of the miniature pressure sensor were observed.

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Melt-layer thickness measurements during crushing experiments on fresh-water ice

Journal of Glaciology ◽

10.3189/s0022143000003877 ◽

1994 ◽

Vol 40 (134) ◽

pp. 119-124

Author(s):

R.E. Gagnon

Keyword(s):

High Pressure ◽

Layer Thickness ◽

Fresh Water ◽

Contact Zone ◽

Pressure Sensor ◽

Front Face ◽

Total Load ◽

Water Ice ◽

The Face ◽

Electrical Conductors

AbstractA stainless-steel platen, with a centrally located pressure sensor on the front face, has been used to crush mono-crystalline, bubble-free fresh-water ice samples. Two electrical conductors, located on the face of the pressure sensor, were connected to a bridge circuit so that the presence of liquid between the two conductors could be detected and its thickness measured. Video records of the ice/ steel contact zone during crushing were obtained by mounting samples on a thick Plexiglas plate which permitted viewing through the specimen to the ice/steel interface. Total load and pressure records exhibited a sawtooth pattern due to the compliance of the ice and the testing apparatus, and spalling of ice from the contact zone. When the region of contact was in the vicinity of the pressure transducer, liquid was detected and peaks occurred in the liquid sensor output when load drops occurred. Contact between the platen and the ice consisted of low pressure zones of highly damaged crushed and/or refrozen ice, opaque in appearance, and transparent, high-pressure regions of relatively undamaged ice. Upper limits for the liquid-layer thickness on the high-pressure undamaged ice were ~3 µm on the ascending sides of the sawteeth in the load records and ~ 21 µ on the sharp descending sides.

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