In view of the lack of wireless data transmission channel in belt transportation monitoring system, it is impossible to realize functions of self-diagnosis information upload after disconnection, wireless sensor access and emergency relay communication after disconnection, a LoRa wireless networking technology scheme applied to belt conveyor transportation monitoring system was proposed. In view of characteristics that chain networking structure is more suitable for multi-point extension of belt conveyor transportation monitoring system, LoRa chain networking mode is adopted. According to requirements of LoRa chain networking transmission mode, data access relationship between nodes is determined, the host node and the child node are designed as a master multi-slave transmission method, the node is routed according to adjacent relationship, so as to form single-layer chain network. In order to meet demand of data transmission, the communication mechanism of patrol inspection and response is adopted. The communication process follows regular time sequence, and the channel is used in an orderly manner. According to the above scheme, hardware and software design of LoRa wireless networking transmission node for belt conveyor transportation monitoring system are presented and tested. The test results show that the transmission performance of LoRa chain networking mode is reliable and stable, the power consumption of nodes in wireless transmission state is less than 300 mW, the transmission delay of 10 nodes is 1.12 s, and the packet loss rate is less than 0.6%, which can meet requirements of belt conveyor transportation monitoring system for wireless networking transmission function.
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