基于轨道电路原理的新型实时断轨检测方法

A Novel Method of Real-time Broken Rail Detection Based on the Principle of Track Circuits

基于轨道电路原理的实时断轨检测方法是不安装轨道电路的区段实现实时断轨检测的有效途径.根据轨道电路的电气分割和信号接收的基本原理和方法,通过分析ZPW-2000A和ZP-W1-18型轨道电路的工作原理,特别是其在实现断轨检测功能方面的特点,提出了一种新型断轨检测方法.该方法的关键设备本质上是中央发送两端电流接收式无绝缘轨道电路.通过定性分析,说明安装在轨道上的4个电流传感器自身及其组合信号有效表征了是否发生断轨,通过分析判断这些信号可以检测断轨.该方法具有受轨道一次参数和环境因素影响小、室外设备简单、抗牵引回流干扰能力强等优点,是一种值得研究和开发的方法.

The real-time broken rail detection method based on the principle of track circuits is an effective way to carry out real-time broken rail detection in the railway sections without a track circuit. Based on the electric-insulated and signal-received principles and technologies of a track circuit, and by analyzing the operation principles of the track circuits of ZPWA-2000A and ZP-WI-18 type, a novel method of real-time broken rail detection is presented. The key component of the method is,in nature, a centre-fed double-sided current-received jointless track circuit. By qualitative analysis,it is understood that the signals detected by the four current sensors installed in rails indicate whether broken rail appears, and broken rail could be detected on the basis of analyzing and judging these signals. The method, which is worth researching and developing,has some virtues such as its performance effected little by the prime parameters of track circuits and the environmental factors, simple outdoor equipments, and strong ability to resist interference from traction return currents.