西德西门子公司研制了新的无线式列车控制系统。这个系统由于采用微波,不需沿线铺设导线,不影响线路工作,也没有危害。这种列车控制系统的每个接发送器可供多线使用。微波工作频率选用36千兆赫,可以传送电话和图象。为了保证从信号技术上能安全地处理地面和车上的数据和信息,研制了安全级微型计算 West Germany Siemens developed a new wireless train control system. The system due to the use of microwave, no need to lay wire along the line, does not affect the line work, there is no harm. Each of these train control systems can be used with multiple transmitters. Microwave operating frequency of 36 gigahertz, can send phones and images. In order to ensure that signals and information on the ground and in the vehicle can be safely processed from signals, a safe level micro-computing