20 April 2016 High-pressure sensor using piezoelectric bending resonators
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A novel design of pressure sensor based on piezoelectric bending resonator is described in this paper. The resonator is isolated from and mechanically coupled to the surrounding fluid using a sealed enclosure. The pressure applied to the enclosure induces a compressive stress to the resonator and reduces its resonance frequency. In principle the mechanism allows for achieving large resonance frequency shifts close to 100% of the resonance frequency. A high-pressure sensor based on the mechanism was designed for down-hole pressure monitoring in oil wells. The sensor is potentially remotely-readable via the transmission of an electromagnetic signal down a waveguide formed by the pipes in the oil well. The details of the pressure sensor design and verification by FE analysis and initial test results of a preliminary prototype are presented in this paper.
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Xiaoqi Bao, Xiaoqi Bao, Stewart Sherrit, Stewart Sherrit, Nobuyuki Takano, Nobuyuki Takano, "High-pressure sensor using piezoelectric bending resonators", Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 98032O (20 April 2016); doi: 10.1117/12.2218583; https://doi.org/10.1117/12.2218583

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