列车安全无线预警系统分站设备研制

Substation Design for Railway Safety Wireless Forewarning System

列车无线预警系统由主站和分站2部分组成。分站通过无线方式与主站通信,检测列车运行的速度和方向,主站设计有列车速度和方向的语音报警、故障提示、存储历史记录和检索等功能。在分站设计中,单片机采用掉电方式,磁钢外部激活的设计满足低功耗的要求。后备电池的切换采用磁保持继电器,有效地解决了在线侦测和低功耗的技术难点。该系统经长期运行,性能稳定可靠。

Railway safety wireless forewarning system consists of a main station and substations. The substations are designed to check and measure the speed and direction of the train and communicate with the main station by wireless way. The main station is designed to give a phonetic alarm about the speed and the direction of the train, prompt malfunction, store historical records, search and so forth. In the design of the substation, MCU （Micro Controller Unit） works in power down mode. The design for alnico to activate MCU can meet the demand of low power dissipation. Switch between working battery and spare batt.ery is fulfilled by using magnetic latching relay. This method effectively lowers the power dissipation. This system has been used stably for a long time.