障碍物及脱轨检测装置是一种具有实时检测功能，并能评估障碍物威胁程度的机械式轨道列车保护装置。该装置由机械系统和电气系统两部分组成，机械系统是安装于列车转向架上的探测装置，电气系统为安装于列车电气柜内的车载机箱，系统间由电缆连接。列车在运行过程中，当检测横梁碰撞到障碍物并且位移到达一定数值时，将会触发限位传感器；当要发生脱轨时，将会触发接近传感器。上述两种情况所产生的信号均会传递给电气系统使列车产生紧急制动，并由TCMS（Train Control & Monitoring System）上传至控制中心。
Obstacle & Derailment Detector(ODD)is a kind of mechanical rail train protection device that can evaluate the threat of obstacles with real-time detection function. The device is composed of mechanical system and electrical system, mechanical system is detection device installed on the frame of the train, electrical system is train chassis installed inside the electrical cabinet in the train, the two systems are connected by cables. When the train is running, the limit sensor will be triggered when the beam detects obstacles existing meanwhile the displacement reaches a certain value, the proximity sensor will be triggered when derailment is occurred. The signals generated by these two cases are transmitted to the electrical system and make the train brake emergency, and then be uploaded to the control center by TCMS (Control Monitoring & System Train).
The product is simple in structure, the weight is no more than 70kg, and it does not occupy the space of the train tunnel. In addition, the input module, power supply module and control module of the electrical system adopt double redundancy design, so if one side lose effectiveness, it can also guarantee the system effective, this ensures the reliability of the system.