分布式光纤传感技术在地铁隧道振动监测中的应用

摘要

In allusion to the problem that the lack of continuous real time method for metro tunnel vi-bration monitoring,distributed optic-fiber sensing technology is applied to metro tunnel vibration mo-nitoring in this article.The sensing system can monitor the abnormal-vibration of trains in real-time. The noise introduced by trains in tunnel is also monitored and can accurately distinguish the abnormal vibration signal,and guarantee low false positive rate.The method has satisfactory performance in continuity and punctuality.And is low cost,convenient setting,conducive to the actual engineering.%针对目前地铁隧道振动状态缺乏连续实时监测方法的问题，提出利用分布式光纤传感技术对地铁隧道运营过程中的振动状态进行监测。传感系统可以对隧道内列车行驶的异常振动情况进行实时监测，同时探测地铁引起的环境振动噪声，并且准确判别出异常振动信号，同时保证极低的误报率。监测方式具有良好的连续性和实时性，而且成本低，布设方便，利于实际工程应用。