Longitudinal strain monitoring of rail using a distributed fiber sensor based on Brillouin optical correlation domain analysis

被引：35
|
作者：
Yoon, Hyuk-Jin [1 ]
Song, Kwang-Yong [2 ]
Kim, Jung-Seok [1 ]
Kim, Dae-Sang [1 ]
机构：
[1] Korea Railrd Res Inst, Uiwang Si 437757, Gyeonggi Do, South Korea
[2] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea
来源：
NDT & E INTERNATIONAL | 2011年 / 44卷 / 07期
关键词：
Longitudinal rail strain; Rail monitoring; Optical fiber sensor; Brillouin scattering; Brillouin optical correlation domain analysis; VIBRATIONS; SCATTERING; STRESSES; TRACK; LOAD;
D O I：
10.1016/j.ndteint.2011.07.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A fiber-optic distributed sensor system is configured to measure the longitudinal strain distribution of a rail in real time. The system is based on the Brillouin correlation domain analysis (BOCDA), in which the variation of local Brillouin frequency (nu(B)) is measured that linearly depends on the strain applied to the optical fiber. In the test measurement, the longitudinal strain distribution along a 2.3 m rail is measured under different loading conditions with a spatial resolution of 3.8 cm and an accuracy of +/- 15 mu epsilon. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：637 / 644
页数：8
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