基于EPLRS的动车定位防撞告警系统用于更加有效地提高动车在运行时的安全,避免追尾、相撞等事故的发生。无线通信子系统、动车定位子系统和显示告警子系统由该防撞系统的地面设备和车载设备共同构成。EPLRS系统包括网控站、中继站、车载电台等设备,具有定位报告和通信两大功能。系统采用DGPS网络结合EPLRS控制网络实现。 EPLRS-based EMU collision warning system is used to more effectively improve the safety of EMU during operation and avoid accidents such as rear-end collision and collision. The wireless communication subsystem, the locomotive positioning subsystem and the display alarm subsystem are jointly formed by the ground equipment and the in-vehicle equipment of the collision avoidance system. EPLRS system includes network control stations, relay stations, car radio and other equipment, with two major functions of positioning report and communication. The system uses DGPS network combined with EPLRS control network.