光纤通信网络中故障优化诊断方法仿真  

Simulation of Optimized Method for Fault Diagnosis in Optical Fiber Communication Network

作　　者：李妍琰[1] 何勇[2] 

机构地区：[1]河南财经政法大学计算机与信息工程学院,河南郑州450002 [2]信阳农林学院计算机科学系,河南信阳464000

出　　处：《计算机仿真》2014年第9期221-224,228,共5页Computer Simulation

摘　　要：在光纤通信网络故障诊断问题的研究中,为及时准确的诊断出光纤故障,对光纤通信网络故障的检测需根据光纤通光后的信号异常曲线变化,完成各种故障判断。但是,由于在长距离的光纤通信中,通光后的故障信号随着传输距离的扩大,会发生较大程度的衰减,造成故障信号曲线发生非正常形变。传统的光纤故障检测方法只能根据采集的信号的异常变化判断光纤故障,对于光纤故障信号的长距离衰减形变无法与正常故障信号进行区分,容易出现误判。提出一种利用光功率值监测方法的光纤故障诊断方法。根据OTDR发射的激光脉冲信号在光纤中的后向瑞利散射和菲涅尔反射对光纤通信网络的功率值进行监测,并将样本的光功率值数据进行均值化处理,获取准确的OTDR故障曲线,为故障点的定位提供准确的数据基础。综合OTDR接收到的反射光功率值变化情况,最终获取准确的光纤故障点的定位。实验结果表明,利用光功率值监测方法对光纤故障进行诊断,极大的提高了诊断结果的准确性,缩短了诊断时间。A fault diagnosis method for optical fiber was proposed based on luminous power value monitoring method. According to the backward Rayleigh scattering and the Fresnel reflection of the emissive laser pulse signal of the OTDR in the optical fiber, the power value of optical fiber communication network can be monitored. And the op- tical power value of the sample data was equalized, to obtain accurate OTDR fault curve, and provide the accurate da- ta foundation for the failure point positioning. The situation changes of the received reflected luminous power value of OTDR can be concluded, so as to obtain the accurate location of optical fiber＇s fault point. The experimental results show that the use of luminous power value monitoring method for fault diagnosis of optical fiber, can greatly improve the accuracy of the diagnosis and shorten the diagnostic time.

关 键 词：光功率值 监测 光纤故障 诊断方法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]