通信光缆线路中的故障点定位和有效检测技术

Fault Location and Effective Detection Technology in Communication Optical Cable Lines

本研究为顺利完成信号及噪声之间的分离,以此准确定位通信光缆线路内的故障点,防治故障点出现漏判或者误判的情况,进一步改善故障点定位精度。在深入分析通信光缆线路结构及影响故障点定位准确性因素的基础上,通过光时域反射仪用于通信光缆线路内的故障点定位与检测方法 ,依托小波变换模极大值监测信号奇异点理论,并与阀值去噪方法完成去噪处理。研究证实,这种方式能有效去除光时域反射仪测试曲线噪声,准确判定光缆线路故障点位置。表明光时域反射仪可以有效去除噪声,而重构信号比较接近原始信息,运用模极大值和阀值去噪能达到去除噪声信号的目的。

In order to achieve the separation between signal and noise,this study proposes a method to accurately locate the fault point in the communication cable line,to prevent the fault point from missing judgment or misjudgment,and to further improve the location accuracy of the fault point.Based on the analysis of the structure of communication optical cable and the factors affecting the accuracy of fault location,the optical time domain reflectometer is used to locate and detect the fault point in the communication optical cable.The signal singularity theory is monitored by wavelet transform modulus maxima,and the denoising is completed with threshold denoising method.The results show that this method can effectively remove the noise of optical time domain reflectometer test curve and accurately determine the location of optical cable fault point.Optical time domain reflectometer can effectively remove noise,and the reconstructed signal is close to the original information.Using modulus maxima and threshold denoising can achieve the purpose of removing noise signal.