一种光时域反射仪实时信号去噪处理的新方法  

A New Real-time Signal Denoising Method for Optical Time Domain Reflectometry

作　　者：周立 苗鹏[1] 

机构地区：[1]上海大学通信与信息工程学院

出　　处：《工业控制计算机》2019年第9期102-103,106,共3页Industrial Control Computer

摘　　要：光时域反射仪是检测光纤线路故障的重要工具[1]。在实际应用中,传统光时域反射仪往往存在着噪声干扰,特别是短距离光纤和长距离光纤拼接等情况,噪声干扰会导致错误的故障点定位。提出了一种新型实时信号去噪新方法,对OTDR信号进行两级去噪,其中第一级去噪为应用小波阈值法,之后通过实时匹配数据中特征信号对数据进行二级去噪。我们将新方法与传统数字累加平均方法进行对比分析,证明新方法可以有效地降低检测噪声,提高了光纤故障点定位精度,同时降低数据采样的次数,大大缩短了测试时间,提高了测试效率。In this paper,a new real-time signal denoising method is proposed,which includes two-stage denoising on the OTDR signals.The OTDR signal is filtered by the wavelet threshold method,and then the data is denoised by real-time matching the characteristic values.This paper compares the new method with the traditional temporal averaging method using real data.The new method can effectively reduce the noise,improve the detection accuracy of the fiber fault point,reduce the number of data sampling,and improve the test feasibility.

关 键 词：光纤故障 光时域反射仪 信号去噪 

分 类 号：TN9[电子电信—信息与通信工程]