针对地铁列车这个特殊的应用对象,开发了一个专门的数据采集网络系统。详细介绍了该系统的组成、工作原理及通信方式,重点放在其特别之处。并列举了该系统中的一个接口实例,介绍了其通信规范、帧的类型与格式、传输时序与控制流程等。运营结果表明该系统能稳定可靠地工作,满足设计的要求。 Aiming at the special application object of subway train, a special data acquisition network system has been developed. Details of the system’s composition, working principle and means of communication, with emphasis on its special features. An example of an interface in the system is listed. The communication specifications, the types and formats of frames, transmission timing and control flow are introduced. Operating results show that the system can work stably and reliably to meet the design requirements.