Real-Time Position and Speed Monitoring of Trains Using Phase-Sensitive OTDR

被引：245
作者：
Peng, Fei [1 ]
Duan, Ning [1 ]
Rao, Yun-Jiang [1 ]
Li, Jin [1 ]
机构：
[1] Univ Elect Sci & Technol China, Key Lab Opt Fiber Sensing & Commun, Chengdu 610051, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Optical fiber sensor; optical time-domain reflectometry (OTDR); railway safety; vibration measurement;
D O I：
10.1109/LPT.2014.2346760
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
It is essential to carry out real-time position and speed monitoring of trains to ensure the safety of railway operation. In this letter, the phase-sensitive optical-time-domain reflectometry (Phi-OTDR) is demonstrated to overcome the drawbacks of the track circuit, which is widely used and has the risk to be damaged by lightening, for the first time. A long sensing cable, buried nearby to two parallel railways, is used to detect the vibration signals generated by trains with Phi-OTDR and the real-time vibration signals of the trains are extracted/quantified by wavelet denoising. With the edge detection by normalized sliding variance, 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 letter offers a new passive way for safety monitoring of railway operation.
引用
收藏
页码：2055 / 2057
页数：3
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