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Proceedings Paper

Strain-temperature monitor of high speed railway switch by fiber Bragg grating gauges
Author(s): Weilai Li; Xiaomei Huang; Jian Cheng; Jianjun Pan
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Paper Abstract

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 με, and the strain curves closely correlated with the temperature curves.

Paper Details

Date Published: 12 October 2010
PDF: 6 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76565E (12 October 2010); doi: 10.1117/12.865497
Show Author Affiliations
Weilai Li, Wuhan Univ. of Technology (China)
Xiaomei Huang, Wuhan Univ. of Technology (China)
Jian Cheng, Wuhan Univ. of Technology (China)
Jianjun Pan, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

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