基于双向OTDR测试的通信光缆故障智能检测方法  

Intelligent Fault Detection Method of Communication Optical Cable Based on Bidirectional OTDR Test

作　　者：卢杰 张艳强 LU Jie;ZHANG Yanqiang(China Petroleum Pipeline Communication Power Engineering Co.,Ltd.,Langfang 065000,China)

机构地区：[1]中国石油天然气管道通信电力工程有限公司,河北廊坊065000

出　　处：《通信电源技术》2023年第7期55-57,共3页Telecom Power Technology

摘　　要：当前通信光缆故障检测时,主要通过单向光时域反射仪(Optical Time Domain Reflectometer,OTDR)测试获取光缆运行数据,但仪表测试距离的限制会影响采集数据的完整程度,导致故障智能检测结果F1值较低。因此,提出一种以双向OTDR测试为核心的通信光缆故障智能检测方法。应用多个光时域反射仪建立双向OTDR测试方案,实时采集通信光缆运行数据,并结合双向拉曼分布式放大技术,弥补光纤传输损耗。依托于小波变换算法分解测试信号,从时域和频域2个方面提取光缆运行信号特征。利用故障树概念构建通信光缆故障树,检测出当前通信光缆存在故障类型,并定位故障点具体位置。实验结果表明:所提方法应用后,得出的通信光缆故障智能检测结果F1值为0.93,满足智能检测精度要求。At present,the optical cable operation data is mainly obtained through one-way Optical Time Domain Reflectometer(OTDR)test during the fault detection of communication optical cable,but the limitation of the instrument test distance will affect the integrity of the collected data,resulting in a low F1 value of the fault intelligent detection result.Therefore,an intelligent fault detection method based on bidirectional OTDR test is proposed.Multiple optical time domain reflectors are used to establish a bidirectional OTDR test scheme,collect the operation data of the communication optical cable in real time,and combine the bidirectional Raman distributed amplification technology to compensate for the optical fiber transmission loss.Relying on the wavelet transform algorithm to decompose the test signal,the characteristics of optical cable operation signal are extracted from both time and frequency domains.The concept of fault tree is used to construct the fault tree of communication optical cable,detect the existing fault types of current communication optical cable,and locate the specific location of the fault point.The experimental results show that after the application of the proposed method,the F1 value of the intelligent detection result of communication optical cable fault is 0.93,which meets the requirements of intelligent detection accuracy.

关 键 词：光时域反射仪(OTDR) 双向测试 通信光缆 数据采集 特征提取 故障检测 

分 类 号：TN92[电子电信—通信与信息系统]