基于Φ-OTDR技术的城市地下供水管网主干线泄漏检测与定位  

The Urban Watersupply Pipeline Leakage Monitoring Technique Based on Phase-sensitive OTDR

作　　者：沙洲[1] 杨洋 封皓[1] 曾周末[1] 赵永彬 

机构地区：[1]天津大学,天津300072 [2]河北省仪器仪表工程技术研究中心,河北承德067000 [3]承德龙志达智能仪器仪表科技有限公司,河北承德067000

出　　处：《中国仪器仪表》2016年第11期72-76,共5页China Instrumentation

基　　金：承德高新技术产业开发区创新基金支持项目(项目编号:201421);河北省科技计划资助项目(项目编号:159676100D)

摘　　要：为解决城市地下供水管网水泄漏无法检测及定位的问题,提出基于相位敏感的光时域反射仪Φ-OTDR技术的水声泄漏检测技术。该技术作为一种分布式光纤振动传感器,具有多点探测、灵敏度高、结构简单、低成本等先天优势,应用于城市地下供水管道的实时监测,具有很好的发展前景。本文搭建供水管道水泄漏的模拟实验平台,通过分析泄漏信号的特征频谱分量,排除现场实验环境中其他干扰因素的影响,实现对水泄漏信号的识别,分离与定位,并得到了较高的信噪比。理论分析和现场模拟实验表明,Φ-OTDR技术可以应用于城市地下供水管网漏水事件的监测与定位。A phase-sensitive OTDR based water pipeline leakage detecting technique is proposed to monitor and locate the leakage occurring to underground water supply pipelines. It benefits the intrinsic advantages of simultaneous multipoint monitoring, high sensitivity, simple structure and cost effective being a kind of distributed fiber vibration sensor. This technique is promising to be applied to the real time leakage monitoring of underground water pipelines. A simulation experiment is carried out in this paper, and the water leakage signal has been identified, separated and located through analyzing the characteristic spectrum components and elimi nati ng the envi ron ment al disturbing noises. A relatively high SNR of the leakage location has been achieved. This technique is proved practicable and applicable through theoretical analysis and experiments to be served as a solution to monitor and locate the underground water pipeline leakage.

关 键 词：Φ-OTDR 城市供水管网 分布式光纤振动传感器 泄漏检测与定位 

分 类 号：TU991.33[建筑科学—市政工程] TP212[自动化与计算机技术—检测技术与自动化装置]