用于液位测量的非对称法布里-珀罗光纤压力传感器。

Asymmetric Fabry-Pérot fiber-optic pressure sensor for liquid-level measurement.

作者信息

Lu Tao, Li Zhengjia, Xia Danqing, He Kaihua, Zhang Guangyong

机构信息

School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, People's Republic of China.

出版信息

Rev Sci Instrum. 2009 Mar;80(3):033104. doi: 10.1063/1.3093808.

DOI:10.1063/1.3093808

PMID:19334904

Abstract

It is demonstrated that an asymmetric Fabry-Pérot fiber-optic pressure sensor is capable to precisely measure liquid levels. They are directly proportional to pressures that can modulate cavity length of Fabry-Pérot cavity. As a result, the sensor can operate over a linear region of an interference fringe that enables liquid-levels interrogation by measuring the reflected intensity. Experimental results show the resolving power of 0.4 mm, sensitivity of 2.4 mV/mm, and precision of 1 mm over range of 2.3 m (water) can be achieved. The sensor can measure liquid levels accurately, continuously, and automatically in flammable and explosive circumstances.

摘要

结果表明，一种非对称法布里-珀罗光纤压力传感器能够精确测量液位。液位与可调节法布里-珀罗腔腔长的压力成正比。因此，该传感器可在干涉条纹的线性区域内工作，通过测量反射强度来实现液位检测。实验结果表明，在2.3米（水）的量程范围内，该传感器的分辨率可达0.4毫米，灵敏度为2.4毫伏/毫米，精度为1毫米。该传感器能够在易燃易爆环境中准确、连续且自动地测量液位。