挡轮 meaning in English

catch wheel

For the safety , protecting sets were used to avoid the system from hitting with other wheel sets . optoelectronic switches were used to protect the movement units and sensors . self - detecti ng program could detect the status of sensors and wheel set
系统安全性设计上采用挡轮装置防止前后轮对碰撞在检轮对，系统可靠性设计上硬件采取光电开关和接近开关装置，防止运动超限或传感器发生碰撞，软件上采用自检程序检测各传感器及板卡工作状态，具有自动诊断功能。