基于远程定位的光缆接头故障发现系统应用
2021-04-27童俊杨涛汪俊
童俊 杨涛 汪俊



摘 要:针对光缆接头故障定位问题,本研究在传统的OTDR曲线分析法的基础上,提出一种基于贝叶斯与最小二乘法的OTDR曲线分析法,研究光缆接头故障的远程定位与发现。首先,文章对传统的OTDR曲线分析法,包括小波分析法和最小二乘法进行了优缺点分析。其次,基于贝叶斯与最小二乘的OTDR曲线分析法对故障点进行了检测。然后,基于GIS算法对故障点进行了精确定位。最后,通过实验仿真验证了文章提出的算法。实验结果表明,文章提出的算法对故障点的定位信息与实际故障点信息高度吻合。
关键词:光缆接头故障;贝叶斯;最小二乘;OTDR曲线
中图分类号:TN913.33 文献标识码:A 文章编号:1001-5922(2021)08-0174-04
Application of Optical Cable Joint Fault Detection System Based on Remote Location
Tong Jun,Yang Tao,Wang Jun
(Hangzhou power supply company of State Grid Zhejiang Electric Power Co., Ltd., HangZhou 310016, China)
Abstract:Aiming at the problem of optical cable connector fault location, this paper proposes an OTDR curve analysis method based on Bayesian and least square method based on the traditional OTDR curve analysis method to study the remote location and discovery of optical cable connector faults.. Firstly, this paper analyzes the advantages and disadvantages of traditional OTDR curve analysis methods, including wavelet analysis and least square method. Secondly, OTDR curve analysis method based on Bayesian and least squares is used to detect the fault point. Then, the fault point is accurately located based on GIS algorithm. Finally, the proposed algorithm is verified by experimental simulation. The experimental results show that the fault location information of the proposed algorithm is highly consistent with the actual fault location information.
Key words:optical cable joint failure; Bayesian; least squares; OTDR curve
光纜接头故障点精准定位需要用到故障点的光缆距离,而光缆距离需要通过OTDR曲线分析获得,因此OTDR曲线分析方法决定了故障点定位的精准度。传统 OTDR 曲线分析方法主要包括最小二乘法、小波分析法[1-5]等,但由于这些方法检测速度缓慢,检测精度较低,故本研究中最小二乘法的基础上提出基于贝叶斯决策的OTDR曲线分析法。
1 基于贝叶斯与最小二乘的OTDR曲线分析法
目前,最常用也是传统的OTDR曲线分析方法主要有小波变换和最小二乘法。虽然小波分析法和最小二乘法都可以检测到OTDR曲线中的事件点,但在实际应用中,由于这两种方法检测精度过低、检测速度慢,因此不适用于本研究中的光缆接头故障发现系统[7-8]。因此,文章提出一种基于贝叶斯与最小二乘法的OTDR曲线分析法。……
