关键词: 通信网络, CAN总线, 485总线, 自动地址分配

Abstract:

The paper designs a system communications network for underground mine protection.The network structure of the system employs 485 Bus to achieve interconnection of communication nodes,automatic address assignment,query on the number of nodes,fault detection and other functions.The system uses CAN bus for communication between the input and output module nodes that have been assigned addresses to realize underground environment monitoring.And the system can achieve long-distance communications with repeater.The network communication system is suitable for underground mine protection owing to its flexibility,automatic address assignment and other characteristics.

Key words: communications network;CAN bus;485 bus;automatic address assignment