基于ARM及超声波的列车接近报警系统研究

列车接近报警是铁路安全领域的重要组成部分，是保障铁路工人安全作业的一项重要指标。针对编组站的特殊环境，开发了一种基于高性能ARM单片机LPC2132、超声波换能器，以及RS-485串行通信总线的列车接近报警器。它能根据远程控制计算机的选项输入指令自动完成数据的采样、运算、传输，实现长时间的自动报警，实时数据查询，并可图表显示，测量精度高，是列车接近报警的新方法。

Train Approach Annunciator Based on ARM and Ultrasonic Technique

Train approach annunciator is an important part in railway safety system and also a measure for ensuring the safety of railway working staff. A train approach annunciator, which was composed of the powerful ARM SMC LPC2132, ultrasonic energy converter and RS-485 serial bus, was developed for the special environment of marshalling yard. As a new technique of the traing approach alarming, the annun-cialor can aulomafically conducl dala sampling, acquisition and lransmission according lhe inslrucfions from the remote controlling processor with high measurement precision, make alarming for a quite long time, and offer data query and chart display.