An extrinsic Fabry-Perot interferometer-based large strain sensor with high resolution

被引：49

作者：

Huang, Ying ^{[1
]}

Wei, Tao ^{[2
]}

Zhou, Zhi ^{[1
,2
]}

Zhang, Yinan ^{[2
]}

Chen, Genda ^{[1
]}

Xiao, Hai ^{[2
]}

机构：

[1] Missouri Univ Sci & Technol, Dept Civil Architectural & Environm Engn, Rolla, MO 65409 USA

[2] Missouri Univ Sci & Technol, Dept Elect & Comp Engn, Rolla, MO 65409 USA

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2010年 / 21卷 / 10期

基金：

美国国家科学基金会;

关键词：

extrinsic Fabry-Perot interferometer (EFPI); strain sensor; large strain measurement; high resolution; structural health monitoring;

D O I：

10.1088/0957-0233/21/10/105308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A three-layer packaged structure is proposed for an extrinsic Fabry-Perot interferometer-based optical fiber sensor in order to produce high resolution for large strains. The resolutions of three data processing algorithms including interference frequency tracking, period tracking and phase tracking are investigated and compared. Laboratory tests indicate that the proposed sensor structure can measure a strain of up to +/- 120 000 mu epsilon (+/- 12%) with resolution as high as 10 mu epsilon. The sensor prototype is insensitive to fiber misalignment, enabling the study of progressive structural failures with an integrated use of the three algorithms.

引用

页数：8

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