基于线性拟合的区间轨道电路传输特性

摘要

分析不同载频的区间轨道电路检测数据散点图,提出采片用线性拟合方法分析区间轨道电路传输特性.对不同载频不同时期的区间轨道电路检测数据进行线性拟合处理,提取衰减系数、波动系数和相关系数 3个特性指标.将特性指标转化为随时变化而变化的趋势图,用以研究区间轨道电路传输特性的变化趋势,并判断补偿电容工作状态.提出基于历史数据库的区间轨道电路动态性能评判方法,该方法与现有的标准曲线对比法相比,减少了数据需要量,增加了趋势分析功能.%According to the analysis of the scatter diagram which was drawn based on the inspection data of the section track circuit with different carrier frequencies, the linear fitting method was proposed to analyze the transmission characteristics of the section track circuit. The inspection data of the section track circuit with different carrier frequencies in different periods were processed with linear fitting method to extract three characteristic indexes, namely, the attenuation coefficient, the fluctuation coefficient and the correlation coefficient. The characteristic indexes were transformed into time-varied trend chart to research the variation trend for the transmission characteristics of the section track circuit and to judge the working state of the compensation capacitors. The method based on historical database was proposed to evaluate the dynamic performance of the section track circuit. Compared with the existing standard curve contrast method, this method demands less data and adds the function of trend analysis.