Research And Implementation Of Cold Chain Logistics Dynamic Monitoring System Based On RPID And OneNET Platform

In recent years,from the initial concept to the application,the Internet of Things has gradually evolved from the industrial and public service fields to civilian life,including environmental data monitoring,food safety monitoring,and smart home appliances.The Internet of Things is gradually changing the way most people live.In this paper,based on the dynamic monitoring of cold chain logistics of beef and mutton in Ningxia,the cold chain logistics dynamic monitoring system is researched and designed from three aspects:hardware,software and algorithm,based on radio frequency identification,ZigBee protocol,wireless sensor network and OneNet.This paper combines wireless sensor nodes with RFID tag readers,intelligent terminal sensors,etc.,and simulates and analyzes the node routing algorithm,reduces its routing congestion,and improves the path utilization to accommodate the large number of nodes.This paper constructs the overall framework of the cold chain logistics dynamic monitoring system,and uses the C/S framework to take the system operation platform at the application layer to provide managers with a visual viewing interface and an operation interface.The close combination of theory and practice adds more practical significance to the project.The innovation of this article is mainly summarized in the following three aspects:(1)Using the embedded development technology,TCP/IP network protocols,etc.,a dynamic monitoring system for cold chain logistics based on OneNET was designed.The system uses OneNET as the coordination center and the Restful API protocol as the specification to achieve sealed environment monitoring data uploading.Closed-loop control system for control commands.At the same time implements the Android client information display and the WeChat interface control.(2)This paper combines the improved ZBR node routing algorithm to provide ZigBee routing design basis for the system,which can optimize the path selection of the routing node to the utmost.(3)Designed and developed a ZigBee coordinator node based on the HTTP protocol as the access method and serial communication as the data transmission channel.External temperature,humidity,infrared,smoke sensors,GPS positioning,and light relays were connected on the basis of the ZigBee device.The terminal has perception and action capabilities.