基于LoRa的无线多参数环境监测节点设计

Design of wireless multi-parameter environment monitoring node based on LoRa

为了提高对大气污染物违规排放的监控能力,针对传统的大气环境监测站数量少、监测范围小、成本高等不足,提出了一种以STM32F103微控制器为核心基于LoRa的无线多参数环境监测节点的设计。利用STM32F103内置基于DMA功能的ADC采集6路电化学传感器的气体浓度数据;利用串口功能实现GPS定位数据、PM2.5/PM10颗粒物浓度数据和温湿度等参数的处理;通过LoRa无线模块,将采集的数据传输至LoRa网关并在终端上进行显示。测试结果表明,监测节点可以远程实时监测6种气体浓度、PM2.5/PM10颗粒物浓度、温湿度及行程轨迹等参数,误差结果在允许的范围内。该节点结合无人机、无人车等载体平台使用,具有监测范围广、检测效率高、机动性强、成本低等优点,为环境监测提供一种新的技术手段。

In order to improve the ability to monitor the emissions of atmospheric pollutants,and for the shortage of the traditional atmospheric environmental monitoring stations,such as the lack of distribution,the limited monitoring scope and the high cost,a design of multi-parameter environment wireless monitoring node based on STM32 F103 microcontroller and LoRa is proposed.The ADC and the serial port with DMA function inside of the STM32 F103 is used to collecte the data of 6 electrochemical gas sensors,GPS location data,PM2.5/PM10 particle concentration data,the temperature and humidity.The collected data is transmitted to the LoRa gateway through the LoRa wireless module and displayed on the terminal.Test results show that the node can monitor 6 kinds of gas concentration,PM2.5/PM10 particle concentration,temperature and humidity and travel path in real time,and the error is within the allowable range.The node combined with UAV or unmanned vehicle has the advantages of wide monitoring range,high detection efficiency,high mobility and low cost;and it provides a new technical means for environmental monitoring in real time.