基于分布式光纤传感的埋地供水管道泄漏检测与定位  

Leak Detection&Localization in Buried Water Supply Pipelines Using Distributed Fiber Optic Sensing

作　　者：龙志宏 毕灵月 王强[2] 张智望 LONG Zhi-hong;BI Ling-yue;WANG Qiang;ZHANG Zhi-wang(Guangzhou Water Supply Co.,Ltd.,Guangzhou 510060,China;School of Energy,Environment&Safety Engineering,China Jiliang University,Hangzhou 310018,China;School of Mechanical&Electrical Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]广州市自来水有限公司,广东广州510060 [2]中国计量大学能源环境与安全工程学院,浙江杭州310018 [3]中国计量大学机电工程学院,浙江杭州310018

出　　处：《中国市政工程》2025年第1期34-38,143,144,共7页China Municipal Engineering

摘　　要：在地下输水管网管理中,水管老化与破损导致的泄漏问题日益凸显,对居民用水安全和水资源管理构成严重威胁。该文利用基于拉曼散射和光时域反射技术相结合的分布式光纤测温系统(DTS),对埋地供水管道进行泄漏检测和定位试验研究。首先,在实验室进行小尺度PE管道泄漏试验,通过试验对比管道泄漏前后的温度变化。然后,将检测信号经过小波滤波和平均值滤波处理后对泄漏点定位。结果表明:DTS系统能够准确捕捉到供水管道泄漏引起的温度变化,能用于供水管道的泄漏检测。系统的单点定位误差为0.43 m,两点定位误差为0.65 m和0.58 m。最后,在埋地供水管道现场进行较大尺度管道渗漏试验,取得了较好的测试效果。In the management of underground water supply networks,the leakage problems caused by aging and damage of water pipes have become increasingly prominent,posing a serious threat to residents'drinking water safety and water resource management.This paper conducts experimental research on leakage detection and location of buried water supply pipelines using a Distributed Temperature Sensing System(DTS)combined with Raman scattering and Optical Time Domain Reflectometry techniques.Firstly,a small-scale polyethylene(PE)pipeline leakage experiment is carried out in the laboratory,and the temperature changes before and after the pipeline leakage are compared through experiments.Then,the detection signal is processed by wavelet filtering and moving average filtering to locate the leakage point.The results show that the DTS system can accurately capture the temperature changes caused by water supply pipeline leakage and can be used for leakage detection of water supply pipelines.The single-point location error of the system is 0.43 m,and the two-point location errors are 0.65 m and 0.58 m,respectively.Finally,a large-scale pipeline leakage experiment is carried out on-site for buried water supply pipelines,and good test results are obtained.

关 键 词：分布式光纤 供水管道 泄漏检测 泄漏定位 

分 类 号：TU991.61[建筑科学—市政工程]