中文摘要：

利用无绝缘轨道电路和机车信号的相互关系,分析道砟电阻对机车信号感应电压幅值包络的影响规律,并基于指数拟合,确定机车信号感应电压幅值包络的衰减系数,建立道砟电阻、轨道电路长度与该衰减系数间的回归计算模型. 针对该衰减系数易受补偿电容故障影响的问题,提出局部拟合和全局拟合相结合的无绝缘轨道 电路道砟电阻回归估算方法,并基于现有的机车信号远程监控平台建立相应的道砟电阻在线监测系统.实验表明,本文提出的方法对于天气和温度变化对道砟电阻的影响较为敏感,具有估算准确度高、监测成本低、受补偿电容故障影响小等优点.

英文摘要：

This paper analyzed the influence law of ballast resistance on amplitude envelope of induced voltage incab signal by utilizing the interrelationship between jointless track circuit and cab signal. The attenuation trendparameter of the cab signal-induced voltage amplitude envelope was determined and the regression calculationmodel between ballast resistance, track circuit length and this attenuation trend parameter was establishedbased on the exponential fitting. Meanwhile, with regard to the attenuation trend parameter that is easily af-fected by the compensation capacitor failure, this paper presented a regression model for estimating the ballastresistance of jointless track circuit by combining global fitting with local fitting, and by integrating it with theexisting cab signal remote monitoring platform, a corresponding on-line ballast resistance monitoring systemwas built. Experimental results show that this method is more sensitive to the influence of the change of theweather and temperature on ballast resistance, with the advantages of high accuracy, low monitoring cost andcertain immunity against the influence of capacitor faults.