提出了一种新颖的多点长距离有线通信系统的设计方案 ,它采用令牌环总线的通信方式 ,在其基础上又加入了一条专门的通信检测电路 ,从而保证了通信的可靠性并克服了现在一般数据采集站中从站间通信困难的缺点。当主站广播数据至各从站时 ,采用硬件转发方式 ,大大提高了通信效率 ,并且可将站与站间的通信距离延长到数公里 A novel design scheme of multi-point and long-distance wired communication system is proposed, which adopts the communication method of token ring bus, and adds a special communication detection circuit based on it, so as to ensure the reliability of communication and overcome Now the general data acquisition station in the shortcomings of communication difficulties between slaves. When the master broadcasts data to each slave, the hardware forwarding mode is adopted, which greatly improves the communication efficiency and extends the communication distance between the station and the station to several kilometers