基于钢轨固体声检测的列车接近报警实验研究

Experiment study on an alarm of approaching train based on detection of the solid state sound in rail

本文基于对列车运行时轮轨激励声及其在钢轨中传播的“波导效应”分析,设计了在远处测量钢轨中固体声信号随列车接近时变化的检测系统,利用改进的协方差算法分析了该固体声的功率谱密度,找出了列车接近时声信号变化特点,为预报列车的接近提供了实验分析。

In this paper,we have been making the measurement of vibration changing in the rail when a train approaching on the basis of the solid state sound theory.The PSD of the solid state sound was estimated in mending covariance arithmetic. It can do something for the frame of beforehand-alerting approaching train that was made on the point of the the solid state sound changing.