A distributed optical fiber bi-directional strain-displacement sensor

被引:0
|
作者
Liu, TG [1 ]
Li, C
Zhang, YM
Jiang, JF
Ding, YK
Ding, S
Cheng, YX
Zhang, GS
机构
[1] Tianjin Univ, Inst Modern Opt Instrument, Minist Educ, Key Lab Opelect Informat Sci & Technol, Tianjin 300072, Peoples R China
[2] Kunming Univ Sci & Technol, Coll Informat & Automat Engn, Kunming 650051, Peoples R China
来源
PROGRESS IN NATURAL SCIENCE | 2003年 / 13卷 / 01期
关键词
optical fiber bi-directional gauge of strain-displacement; optical time domain reflectometer (OTDR); fiber bending loss; strain; displacement;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A distributed optical fiber strain-displacement sensor is developed, which consists of an optical fiber gauge of strain-displacement and an optical time domain reflectometer (OTDR). The operational principle is the modulation of fiber loss in OTDR, i.e. the strain and displacement in monitoring position are obtained from the bending loss of optical fiber bonded on the optical fiber gauge of strain-displacement. After examining the strain and displacement in the cantilever and the micro displacement rack respectively, the result indicates that the distributed optical fiber gauge of strain-displacement can monitor strains or displacements in different sensitive lengths. The key technique for measuring bi-directional strain-displacement is the pretreatment of bending of the freely suspended optical fibers, which can be identified with OTDR by inserting time delay optical fiber.
引用
收藏
页码:74 / 77
页数:4
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