基于通信信号本身实现光纤故障检测  

Fiber fault detection based on communication signal

作　　者：薛欣 闫慧文 易小刚 XUE Xin;YAN Huiwen;YI Xiaogang(College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,P.R.China)

机构地区：[1]太原理工大学物理与光电工程学院

出　　处：《深圳大学学报（理工版）》2019年第5期551-556,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(61475112)~~

摘　　要：报道一种基于光网络中的通信信号自身来检测光纤链路故障点的方法.该方法通过数据采集装置对参考信号和带有故障点信息的回波信号进行收集,利用排列熵算法提取两者中的随机部分,将提取出的两部分随机信号再做互相关运算,由互相关曲线峰值的位置推知故障点发生的位置.实验以时分复用无源光纤网络中传输的通信信号为探测信号,检测对象是带有模拟故障点的G652单模光纤.不同于传统的光时域反射仪,本研究提出的故障点检测方法不需要断开正常的通信网络,且可实现15 cm的位置分辨率,降低光纤链路故障检测的测量成本.This paper presents a practical method of detecting the fault point of optical fiber link based on the communication signal itself in optical network.The method collects the reference signal and the echo signal with the fault point information through the data acquisition device,and then uses the permutation entropy to extract the random part from the communication signals.Finally,the accurate measurement of the fault point of fiber link is detected by correlation operation.The experiment uses the communication signal transmitted in the time-division multiplexing passive optical network as the detection signal,and the detection object is G652 single-mode fiber with simulated fault point.Different from the traditional optical time-domain reflectometry,the proposed method can measure the fault point of the fiber link without disconnecting the normal communication network,achieve a position resolution of 15 cm,and reduce the measurement cost for the fiber link fault detection.

关 键 词：光纤故障 通信信号 光时域反射仪 时分复用光网络 排列熵 相关检测 

分 类 号：TN06[电子电信—物理电子学]