首页>
外国专利>
A train detector and a method of detecting trains
A train detector and a method of detecting trains
展开▼
机译:火车检测器和检测火车的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A train detector having dual ultrasonic sensors positioned adjacent to a rail for sensing the movement thereby of a train wheel and determining the direction and speed of the train for transmitting such information to nearby workers and signal devices and a method of train detecting are disclosed.
展开▼