Abstract:

To solve the problems in tunnel roof abscission layer online monitoring system, such as fixed topology, poor node scalability, measurement results cannot be uploaded automatically, the comprehensive analysis of measurement results is difficult. In the paper, a roof abscission layer detection system based on ZigBee wireless sensor network is proposed, the paper also introduces the principle and implementation of system project. It has the core of STC12C5A single-chip microcomputer, and realizes the accurate measurement of displacement by using the fine drag-rope displacement sensor, and realizes the data communication and sharing by using CC2420 wireless transceiver module. The sensor transmits the measurement results to the sub-station in a way of wireless communication, then the ground monitoring computer achieves real-time, reliable monitoring of underground roof separation condition according to the information uploaded by sub-station.

Key words: Roof abscission layer monitoring, ZigBee wireless sensor network, STC12C5A, CC2420