基于LabVIEW的光缆故障信号检测与处理

发布时间：2018-01-12 17:01

本文关键词：基于LabVIEW的光缆故障信号检测与处理　出处：《长春理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着信息化时代的到来,光纤线路传送网规模逐年增大,光纤通信承载的业务量逐年攀升。当前,光纤通信网呈现出网络规模化、复杂化、高效化的特点,使用传统的手段对光缆进行维护已经受到了很大的局限。光缆故障定位系统的研发对维护光缆线路提供了很大帮助。但是目前对光缆故障的定位还是不够准确,有两个主要原因,一是对OTDR曲线信号中的断纤等事件点的检测不够准确,造成事件点距测试端的光纤长度发生偏差;二是仪器测试数据与实际地点还不能进行准确的匹配。本文对OTDR测试曲线进行了分析,采用小波降噪的方法,结合LabVIEW等相关技术,开发实现了基于LabVIEW的光缆故障定位系统。第一,将采集的光缆线路走向、标志物坐标、中继站点等数据进行统一存储,成为可供LabVIEW调用的数据库。第二,通过小波降噪的方法对OTDR测试得到的曲线进行处理,通过仿真实验,比较降噪效果来确定小波降噪阈值和基小波,准确得出到达发生故障位置的光纤长度。第三,通过对光缆线路上的标志物等资源库与去噪后的曲线进行拟合,结合LabVIEW技术建立光缆故障定位系统,实时反映光缆线路运行状况并对故障信息进行告警显示。第四,对系统进行完善维护,不断更新数据库,加强对光缆线路的维护管理。将系统进行实际检验,证明基于LabVIEW的故障点定位系统的可靠性。
[Abstract]:With the advent of the information era, optical fiber transmission network scale is increasing year by year, the business volume of optical fiber communication load is increasing year by year. At present, optical fiber communication network is a network scale, complex, high efficiency characteristics, the use of traditional means of cable maintenance has been limited. Research of cable fault location system to provide a great help for the maintenance of optical cable line. But the current location of cable fault is not accurate enough, there are two main reasons, one is the detection of OTDR curve signal in fiber breaking events such as point is not accurate enough, a fiber length testing end point event error happened; two is accurate matching test instrument the data and the actual location is not. Based on the analysis of the OTDR curves, using wavelet denoising methods, combined with LabVIEW technology, the development of the LabVIEW based on the fiber optic cable Fault location system. First, the cable line to collect, coordinate markers, relay site data unified storage, can be used for the LabVIEW call database. Second, the OTDR test method of wavelet noise reduction curve processing, through simulation experiment, compared to determine the noise reduction effect of wavelet denoising and threshold based wavelet, accurate conclusions reached fiber length fault location. Third, through the cable on line marker resources were fitted with the denoised curves, combined with the establishment of cable fault location system LabVIEW technology, real-time running status and fault information of cable lines reflect the alarm display. Fourth, to improve the maintenance of system and constantly update the database, strengthen the maintenance and management of optical cable line. The system is tested to prove the reliability of fault location system based on LabVIEW.

【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN913.33;TN911.23

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