Strain-temperature monitor of high speed railway switch by fiber Bragg grating gauges

被引：3

作者：

Li, Weilai ^{[1
]}

Huang, Xiaomei ^{[1
]}

Cheng, Jian ^{[1
]}

Pan, Jianjun ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Engn Lab Fiber Opt Sensing Technol, Wuhan 430070, Peoples R China

来源：

5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTICAL TEST AND MEASUREMENT TECHNOLOGY AND EQUIPMENT | 2010年 / 7656卷

关键词：

fiber Bragg grating; gauge; track; bridge; strain;

D O I：

10.1117/12.865497

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

On the 350km/h high speed railway there is a seamless track switch on a bridge. 32 Fiber Bragg Grating (FGB) gauges are used along the neutral line of the tracks to monitor the strain generated by thermal, geological and vibrational factors, and these FBG strain gauges have the function of strain expansion. Meanwhile other 6 FBG sensors are used to measure the temperature for strain compensating purpose. The Finite Element Analysis method is used to analyze the special shape of the gauges. A testing unit was used to test the FBG gauges and bare FBG on the track samples under measurable pressure and tension. The fixing and encapsulating technology of FBG gauges on the surface of the track and to protect the fiber cable to survive in the harsh conditions are discussed. The strain status of switch tracks could be obtained by processing the data from FBG strain gauges and FBG temperature sensors. The results of measurement showed that in 9 days, the strain in the track shifted 350 mu epsilon, and the strain curves closely correlated with the temperature curves.

引用

页数：6