Research On Technologies Of Agricultural Greenhouse Environmental Parameters Acquisition、Multi-mode Transmission And Regulation

Agriculture is an important pillar of China’s economic and social development,and how to use the limited land for scientific production is the focus of modern agricultural technology concerns.In 2023,China issued the No.1 document requirements: accelerate the development of facility agriculture,promote the automation of feeding,water and fertilizer integration,environmental monitoring and intelligent research and development and application of equipment technology.In recent years,with the maturity and application of the Internet of Things and sensor technology,new opportunities are provided for the development of facility agriculture.Therefore,the design of agricultural IOT system is of great significance for agricultural development.This paper designs an agricultural greenhouse environmental parameter collection,regulation and multi-mode transmission system,which aims to optimize the temperature-controlled greenhouse parameter collection and data transmission methods,and realize the automatic regulation and remote visualization functions of greenhouse environmental parameters.The design applies IOT technology to facility agriculture management,which is of practical significance for regulating crop growth environment,reducing manual intervention and realizing agricultural modernization and informatization.The main contents of the study are as follows:(1)In terms of data acquisition,Zig Bee wireless transmission network multi-nodes are used to collect air temperature and humidity,soil moisture and other data,and then a data integration model is used to pre-process the collected data to improve the accuracy of data acquisition.(2)In the transmission mode,Wi Fi and Bei Dou short message technology are used to transmit environmental data in multiple ways.In network-covered areas,Wi Fi technology is used to upload data to the One Net platform.In areas without network coverage,Beidou short message technology is used for uploading and forwarding data.The two transmission methods complement each other to realize data transmission in the whole region.(3)In terms of feedback adjustment,since the soil moisture in the shed needs to be adjusted by the pump,there will be a large error in the water output of the pump using a microcontroller under normal circumstances.In this study,a fuzzy PID control algorithm is introduced to precisely control the flow rate of the pump and adjust the output of the pump in real time so that the soil humidity can accurately reach the preset value.(4)Finally,after studying the data acquisition,transmission and feedback regulation techniques,a system for collecting,regulating and multi-modal transmission of environmental parameters in agricultural greenhouses was designed,and a visualization interface was established in One Net View 3.0 to receive and display each environmental parameter in real time.