输水管道预警与泄漏定位中Φ-OTDR技术信号处理法  

Signal Processing Method of Φ-OTDR Technology in Early Warning and Leakage Positioning of Water Pipelines

作　　者：杨洋[1,1] 沙洲[2] 封皓[2] 贾志宁[1] 王冠群[1] Yang Yang;Sha Zhou;Feng Hao;Jia Zhining;Wang Guanqun(Hebei Provincial Instrument and Meter Engineering Technology Research Center, Chengde Petroleum College, Chengde, Hebei 067000, China;State Key Laboratory of Measurement Technology and Instrumentation, Tianjin University, Tianjin 300072, China)

机构地区：[1]承德石油高等专科学校河北省仪器仪表工程技术研究中心,河北承德067000 [2]天津大学测试技术及仪器国家重点实验室,天津300072

出　　处：《激光与光电子学进展》2018年第4期92-100,共9页Laser & Optoelectronics Progress

基　　金：河北省科技计划资助项目(159676100D)、承德高新技术产业开发区创新基金支持项目(201421)、承德高新技术产业开发区承德科技创新创业苗圃项目(CGX2016KMP0001)

摘　　要：利用相位敏感光时域反射计(Φ-OTDR)分布式光纤测试系统对城市输水管道安全预警与泄漏定位方法进行研究。通过分析所获得的时域信号、信号功率谱、信息熵、空频能量分布、高通滤波等不同特性,对输水管道进行安全预警与泄漏定位。在对上述各种信号参数进行深入分析和比较的基础上,提出利用空频能量分布这一参数进行输水管道安全预警与泄漏定位是较为有效可靠的方法。实验表明,这一方法在2km的测量范围内定位的误差小于10m。We use phase optical time domain refleetometer （Ф-OTDR） distributed optical fiber measurement system for safety early warning and leak location for city water pipeline. By analyzing the different characteristics of time domain signal, the signal power spectrum, information entropy, space frequency energy distribution, and high-pass filter, we conduct safety early warning and location of pipeline leak. Based on the deep analysis and comparison of the various signal parameters, the space frequency energy distribution is considered as an effective and reliable parameter used for the safety early warning and location of pipeline leak. The experimental results show that positioning error is less than 10 m within 2000 m measurement range based on the method.

关 键 词：传感器 分布式光纤 相位敏感光时域反射计 空频能量分布 安全预警 泄漏定位 

分 类 号：O435.1[机械工程—光学工程]