基于5G通信网络的高精度无线微震监测技术研究

Research on high-precision wireless microseismic monitoring technology based on 5G communication network

目前国内微震监测设备均以线缆传输为主,导致在冲击地压矿井中设备的安装与后期升级改造较为困难。针对此现状,研究了基于5G无线通信网络的高精度微震监测技术,设计了一款支持IEEE 1588协议的无线微震监测系统,其包含高精度三分量MEMS微震传感器,以5G网络通信模块SIM8200EA-M2为通信接口,通过PTP协议实现精准时间同步,使用实时操作系统FreeRTOS和LWIP协议栈处理数据流。该系统实现了采集终端采集到的微震信号通过5G网络进入光纤环网,光纤环网经过支持PTP协议的网络交换机传输数据到计算机进行定位计算,各终端微震信号传输同步精度达120 ns。实验结果表明,该系统接入5G网络的延迟小、精度高,满足冲击地压矿井微震信号智能化监测的需求。

At present,domestic microseismic monitoring equipment is mainly cable transmission,which makes it difficult to install and upgrade equipment in rockburst mine.In view of this problem,a high-precision microseismic monitoring technology based on 5G wireless communication network is studied,and a wireless microseismic monitoring system supporting IEEE 1588 protocol is designed,which contains high-precision MEMS three-component microseismic sensor,uses 5G network communication module SIM8200EA-M2 as communication interface,achieves precise time synchronization through PTP protocol,and real-time operating system FreeRTOS and LWIP protocol stack are used to process data flow.The system realizes that the microseismic signals collected by the acquisition terminal enter the optical fiber ring network through 5G network,and the optical fiber ring network transmits data to the computer for positioning calculation through the network switch supporting PTP protocol.The synchronization accuracy of microseismic signals transmitted by each terminal is 120 ns.The experimental results show that the system has small delay and high precision when connected to 5G network,which meets the needs of intelligent monitoring of microseismic signals in rockburst mines.