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Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology.


ABSTRACT: A passive surface acoustic wave (SAW) pressure sensor was developed for real-time pressure monitoring in downhole application. The passive pressure sensor consists of a SAW resonator, which is attached to a circular metal diaphragm used as a pressure transducer. While the membrane deflects as a function of pressure applied, the frequency response changes due to the variation of the SAW propagation parameters. The sensitivity and linearity of the SAW pressure sensor were measured to be 8.3 kHz/bar and 0.999, respectively. The experimental results were validated with a hybrid analytical-numerical analysis. The good results combined with the robust design and packaging for harsh environment demonstrated it to be a promising sensor for industrial applications.

SUBMITTER: Quintero SMM 

PROVIDER: S-EPMC5539690 | biostudies-other | 2017 Jul

REPOSITORIES: biostudies-other

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