Displacement monitoring of switch track and its slab on a bridge of high speed railway by FBG

Weilai Li; He Li; Jian Cheng; Xiaomei Huang; Jianjun Pan; Ciming Zhou; Minghong Yang

doi:10.1117/12.886026

17 May 2011 Displacement monitoring of switch track and its slab on a bridge of high speed railway by FBG

Weilai Li, He Li, Jian Cheng, Xiaomei Huang, Jianjun Pan, Ciming Zhou, Minghong Yang

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 775375 (2011) https://doi.org/10.1117/12.886026
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

In a 350km/h high speed railway line, there is a seamless switch with ballastless slabs built on a bridge. 54 Fiber Bragg Grating detecting cells are employed to monitor the displacement of track and slab. The cell is of extending function of measurement range, up to 50mm displacement, and is of good linearity. Protecting methods for cells and fiber are adopted to keep them surviving from the harsh conditions. The results show that in 75 days, the displacement of the track and sleeper slab was 8-9mm, and the displacement is of high correlation with daily environmental temperature change.

Citation Download Citation

Weilai Li, He Li, Jian Cheng, Xiaomei Huang, Jianjun Pan, Ciming Zhou, and Minghong Yang "Displacement monitoring of switch track and its slab on a bridge of high speed railway by FBG", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775375 (17 May 2011); https://doi.org/10.1117/12.886026

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