基于改进的二次相关的铁路信号区间电缆故障检测  

Railway Signal Section Cable Fault Detection Based on Improved Second Correlation

作　　者：赵庶旭[1] 孙守川 党建武[1] 

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070

出　　处：《数据采集与处理》2014年第5期815-820,共6页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(60962004)资助项目;兰州交通大学科技支撑基金(ZC2013012)资助项目

摘　　要：铁路信号电缆因跨度长、埋设地下等原因导致其故障判断难度大。通过讨论二次相关算法,并对其进行改进,完成其快速FFT算法实现及实时性能分析;基于改进的二次相关,建立了采用序列时域反射法/扩展频域时域反射法(Sequence time domain reflectometry/spread sequence time domain reflectometry,STDR/SSTDR)技术的信号电缆检测模型。通过仿真实验验证了在不同信噪比下STDR/SSTDR检测模型对铁路信号电缆开路、短路故障的检测能力,表明基于二次相关改进的SSTDR可用于信号区间电缆的故障检测。Railway signal cable is long and under ground, which leads to difficulties in cable fault detection. The second correlation method is improved. The improved computation model based on FFT is designed, and its real-time computation ability is analyzed. Based on the improved second correlation method, a signal cable sequence time domain reflectometry/spread sequence time domain reflectometry （STDR/SSTDR） detection model established. Moreover, the open and short circuit fault detection performance of the model is tested at various SNRs. The result shows that SSTDR based on the improved second correlation can be used to detect the signal section cable fault.

关 键 词：信号电缆 STDR/SSTDR 故障检测 二次相关 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]