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

机译:在800°C高温环境下用于无线无源压力传感器的相位查询

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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.
机译:提出了一种用于800°C高温环境的无线无源压力测量系统,并分析了由读取天线和LC谐振传感器之间的相互耦合引起的阻抗变化。该系统包括一个基于陶瓷的LC谐振传感器,一个用于阻抗相位询问的读出设备,隔热材料以及一个复合温度-压力测试平台。压力传感器的性能可以通过测量系统进行充分测量,包括室温下的压力灵敏度,从室温到800°C的零漂移以及800°C高温环境下的压力灵敏度。结果表明,传感器的线性度为0.93%,重复性为6.6%,磁滞误差为1.67%,传感器灵敏度为374 KHz / bar。所提出的测量系统具有较高的工程价值,在高温环境下具有良好的压力感应性能。

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