Asymmetric Fabry-Perot fiber-optic pressure sensor for liquid-level measurement

被引：24

作者：

Lue, Tao ^{[1
,2
]}

Li, Zhengjia ^{[1
]}

Xia, Danqing ^{[1
]}

He, Kaihua ^{[2
]}

Zhang, Guangyong ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2009年 / 80卷 / 03期

关键词：

cavity resonators; explosions; Fabry-Perot interferometers; Fabry-Perot resonators; fibre optic sensors; flames; level measurement; optical resolving power; pressure sensors; reflectometry; PLASTIC OPTICAL-FIBERS; INTERFEROMETER; LIGHT; DEMODULATION; DESIGN; SYSTEM; DIODE;

D O I：

10.1063/1.3093808

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

It is demonstrated that an asymmetric Fabry-Perot fiber-optic pressure sensor is capable to precisely measure liquid levels. They are directly proportional to pressures that can modulate cavity length of Fabry-Perot 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.

引用

页数：4