2 June 2014 Field test for real-time position and speed monitoring of trains using phase-sensitive optical time domain reflectometry (Φ-OTDR)
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91577A (2014) https://doi.org/10.1117/12.2059188
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
It is essential to carry out real-time position and speed of trains to ensure the safety of railway operation. In this paper, the phase-sensitive optical-time-domain reflectometry (Φ-OTDR) is proposed and demonstrated to overcome the disadvantage of the track circuit that is currently used and has the risk to be damaged by lightening, for the first time, to the best of our knowledge. A long sensing cable, buried nearby two parallel railways, is used to detect the vibration signals generated by trains with Φ-OTDR and the real vibration signals of the trains are extracted/quantified utilizing wavelet denoising. With the wavelet edge detection, the operation status of two nearby trains, including their relative position and speed, are obtained over a 10.2 km measurement length in real-time. This work offers a new passive way for safety monitoring of railway operation.
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Ning Duan, Ning Duan, Fei Peng, Fei Peng, Yun-Jiang Rao, Yun-Jiang Rao, Jiang Du, Jiang Du, Yao Lin, Yao Lin, } "Field test for real-time position and speed monitoring of trains using phase-sensitive optical time domain reflectometry (Φ-OTDR)", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577A (2 June 2014); doi: 10.1117/12.2059188; https://doi.org/10.1117/12.2059188
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