基于LoRa的远程抄表系统的设计与实现

摘要

In order to solve the problems that the wireless meter reading system based on ZigBee technology has short transmission distance and weak anti-interference ability,a new remote meter reading system based on LoRa is designed,which is composed of routing module,repeater and terminal module.These three modules all use low-power RF chip SX1278.In the process of meter reading,4 path detection command frames are proposed for the system.The system can relay the wireless signals at the concentrator to the terminal to extend the wireless communication distance.The test results show that the meter reading system is stable and reliable,and has wide range of meter reading and short networking time.It has broad application prospects.%针对基于ZigBee技术实现的无线抄表系统传输距离近、抗干扰能力弱等问题,设计了一种基于LoRa的新型远程抄表系统.该远程抄表系统由路由模块、中继器及表端模块组成,这三大模块均使用低功耗射频芯片SX1278.在抄表过程中,针对该系统提出了4种路径探测命令帧.该系统能将集中器端的无线信号进行中继转发至表端,延长无线通信距离.测试结果表明,该抄表系统稳定可靠、抄表范围广、组网时间短,具有广泛的应用前景.