基于LoRa的预制菜冷藏设备物联网终端设计  

Design of iot terminal for prefabricated vegetable refrigeration equipment based on LoRa

作　　者：高永霞 孙运强[1] 姚爱琴[1] 赵文强 张婉婷 石喜玲 Gao Yongxia;Sun Yunqiang;Yao Aiqin;Zhao Wenqiang;Zhang Wanting;Shi Xiling(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,太原030051 [2]中北大学电气与控制工程学院,太原030051

出　　处：《国外电子测量技术》2024年第8期64-70,共7页Foreign Electronic Measurement Technology

基　　金：山西省基础研究计划(20210302123062)项目资助。

摘　　要：随着预制菜行业的快速发展,对其冷藏环境的远程监控与管理问题变的日益严峻。针对冷藏设备存在实时数据无法上传和配备人员值守成本高的问题,研究设计了一套基于LoRa技术的物联网监测终端,该系统的核心控制器采用STM32F429芯片,节点和网关数据传输设备采用LoRa传输模块,结合传感器采集冷藏设备的工作参数。利用LoRa模块构建星型自组网,以主机轮询方式将终端节点的数据传输至网关,经4G上传至云平台并可视化显示。实验测试了预制菜冷藏设备冷藏温湿度、环境温度以及压缩机工作电流;并测试了系统在复杂和空旷环境下的LoRa有效通信距离。结果表明,LoRa在复杂环境下通信距离为300 m,在空旷环境中能够达到500 m,该系统表现稳定可靠,能够满足预制菜冷藏设备数据监控的需求。With the rapid development of the prepared dish industry,the problem of remote monitoring and management of its refrigerated environment has become increasingly serious.In view of the problems that real-time data cannot be uploaded and the cost of manning the refrigerated equipment is high,this study designed a set of Internet of Things monitoring terminal based on LoRa technology.The core controller of the system adopts STM32F429 chip,the node and gateway data transmission equipment adopts LoRa transmission module,and the sensor is combined to collect the working parameters of the refrigerated equipment.Using LoRa module to build a star AD hoc network,the data of the terminal node is transmitted to the gateway in the mode of host polling,uploaded to the cloud platform through 4G and displayed visually.The temperature and humidity of the refrigerated equipment,the ambient temperature and the working current of the compressor were tested.The effective communication distance of LoRa in complex and open environment is tested.The results show that the communication distance of LoRa in complex environment is 300 m,in open environment can reach 500 m,the system performance is stable and reliable,and can meet the needs of data monitoring of prefabricated vegetable refrigeration equipment.

关 键 词：预制菜冷藏 监测终端 STM32F429 LoRa传输 自组网 数据采集 

分 类 号：TN99[电子电信—信号与信息处理]