Open AccessA Phase Readout Method for Wireless Passive Sensor Used in Pressure Measurement System
Author(s) -
Hong Yingping,
Liang Ting,
Zheng Tingli,
Zhang Hairui,
Liu Wenyi
Publication year - 2015
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2015.10.007
Subject(s) - wireless sensor network , pressure sensor , wireless , phase (matter) , computer science , electro optical sensor , materials science , environmental science , optoelectronics , embedded system , physics , computer network , telecommunications , nanotechnology , quantum mechanics , thermodynamics
A phase dierence detection method used for reading the resonant frequency through mutual coupling is designed to meet the pressure measurement in harsh environments, and a testing device of integrated modular by developing the hardware circuits is proposed. Description and discussion of the novel theoretical model in the phase readout system is presented, and a pressure test platform based on the phase dierence detection is also established, which is to measure the frequency of a LC resonant sensor on the basis of 96% alumina ceramic substrate. The experimental results show that the proposed phase dierence readout system presents sweep‐frequency detection in the range of 1–100MHz bandwidth, and a high frequency resolution of 0.006MHz. Sensitivity of the sensor is approximately 0.225 MHz/bar from 1 bar to 2 bar. The accuracy and functionality of the phase readout system have emphasized a wider engineering application range, so that we can make it possible that the wireless passive LC resonant sensor revolves well in practical engineering occasions outside the laboratory environment.