基于表面声波技术的被动式井下压力传感器。

Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology.

作者信息

Quintero Sully M M, Figueiredo Sávio W O, Takahashi Victor L, Llerena Roberth A W, Braga Arthur M B

机构信息

Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil.

出版信息

Sensors (Basel). 2017 Jul 15;17(7):1635. doi: 10.3390/s17071635.

DOI:10.3390/s17071635

PMID:28714892

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5539690/

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.

摘要

一种用于井下实时压力监测的无源表面声波（SAW）压力传感器被研发出来。该无源压力传感器由一个SAW谐振器组成，它附着在用作压力传感器的圆形金属膜片上。当膜片随施加的压力而发生挠曲时，由于SAW传播参数的变化，频率响应会发生改变。测得SAW压力传感器的灵敏度和线性度分别为8.3 kHz/bar和0.999。实验结果通过混合解析-数值分析得到了验证。良好的结果以及针对恶劣环境的坚固设计和封装表明它是一种有前途的工业应用传感器。