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Sensors 2015, 15(2), 2548-2564; doi:10.3390/s150202548

Phase Interrogation Used for a Wireless Passive Pressure Sensor in an 800 °C High-Temperature Environment

1
Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China
2
Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
*
Author to whom correspondence should be addressed.
Received: 24 November 2014 / Accepted: 15 January 2015 / Published: 23 January 2015
(This article belongs to the Section Physical Sensors)
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Abstract

A wireless passive pressure measurement system for an 800 °C high-temperature environment is proposed and the impedance variation caused by the mutual coupling between a read antenna and a LC resonant sensor is analyzed. The system consists of a ceramic-based LC resonant sensor, a readout device for impedance phase interrogation, heat insulating material, and a composite temperature-pressure test platform. Performances of the pressure sensor are measured by the measurement system sufficiently, including pressure sensitivity at room temperature, zero drift from room temperature to 800 °C, and the pressure sensitivity under the 800 °C high temperature environment. The results show that the linearity of sensor is 0.93%, the repeatability is 6.6%, the hysteretic error is 1.67%, and the sensor sensitivity is 374 KHz/bar. The proposed measurement system, with high engineering value, demonstrates good pressure sensing performance in a high temperature environment. View Full-Text
Keywords: LC resonant sensor; resonant frequency; high temperature; pressure measurement LC resonant sensor; resonant frequency; high temperature; pressure measurement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, H.; Hong, Y.; Liang, T.; Zhang, H.; Tan, Q.; Xue, C.; Liu, J.; Zhang, W.; Xiong, J. Phase Interrogation Used for a Wireless Passive Pressure Sensor in an 800 °C High-Temperature Environment. Sensors 2015, 15, 2548-2564.

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