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

Sensors

Huixin Zhang¹  Yingping Hong¹  Ting Liang¹  Hairui Zhang¹  Qiulin Tan¹  Chenyang Xue¹  Jun Liu¹  Wendong Zhang¹ 

[1] Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China; E-Mails:

关键词: LC resonant sensor;    resonant frequency;    high temperature;    pressure measurement;   

DOI  :  10.3390/s150202548

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.