煤矿井下远程监控终端设计

Design of remote monitoring terminal in coal mine underground

针对煤矿井下监控终端现有通信方式存在布置不灵活、成本高、维护困难、通信距离短、功耗大等问题,提出了一种煤矿井下远程监控终端设计方案。基于核心处理器STM32F103ZET和无线射频芯片SX1278进行低功耗和无线通信设计;利用信噪比检测信道状态,并采用随机时间退后检测方法避免信道碰撞;通过设计应用层自定义通信协议,保障数据收发的安全性。测试结果表明,监控终端在1.8km通信距离内丢包率不大于4%,平均工作电流约为0.058mA,适用于煤矿远距离、低功耗的数据组网传输。

For problems of inflexible layout,high cost,difficult maintenance,short communication distance and high power consumption of existing communication mode of monitoring terminal in coal mine underground,a design scheme of remote monitoring terminal in coal mine underground was proposed.Low power consumption and wireless communication are realized based on core processor STM32F103ZET and radio frequency chip SX1278;channel state is detected by use of signal-to-noise ratio,and channel collision is avoided by use of random time backward detection method;security of data sending and receiving is guaranteed by designing custom communication protocol of application layer.The test results show that packet loss rate of the monitoring terminal is not more than 4%within 1.8 km communication distance,and average working current is about 0.058 mA.It is suitable for long-distance and low power consumption data networking transmission in coal mine.