Temperature-insensitive fiber Bragg grating liquid-level sensor based on bending cantilever beam

被引：113

作者：

Guo, T ^{[1
]}

Zhao, QD ^{[1
]}

Dou, QY ^{[1
]}

Zhang, H ^{[1
]}

Xue, LF ^{[1
]}

Huang, GL ^{[1
]}

Dong, XY ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2005年 / 17卷 / 11期

关键词：

bending cantilever beam (BCB); fiber Bragg gratings (FBGs); liquid-level sensor; temperature-insensitive;

D O I：

10.1109/LPT.2005.857985

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A temperature insensitive fiber Bragg grating (FBG) liquid level sensor based on bending cantilever beam (BCB) is proposed and demonstrated. The BCB induces axial strain gradient along the sensing FBG, resulting in a Bragg bandwidth modulation. The broadening of FBG spectrum bandwidth and the reflection optical power change with the liquid level and they are insensitive to spatially uniform temperature variations. For a liquid level variation of 500 mm and a temperature range from 0 degrees C to 80 degrees C, the measured liquid level fluctuates less than 2 % without any temperature compensation. By optical power detection via a pin photodiode, the liquid-level sensor avoids complex demodulation process and potentially costs low.

引用

页码：2400 / 2402

页数：3

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