Research On Intelligent Greenhouse Control System Based On Internet Of Things

China’s economic development has entered a new normal.In order to promote the structural reform of the supply side of agriculture,in the "13th Five-Year Plan for National Agricultural and Rural Informatization Development",China has clearly proposed to promote the integration of Internet of Things technology with agricultural production,agricultural marketing,and agricultural management,agricultural services,China must work hard to solve the problem of low system integration and poor overall performance of the Internet of Agriculture.At the same time,food safety issues have received much attention from the public.How to alleviate the contradiction between supply and demand of agricultural products and restore consumers’ trust in agricultural products has become an important issue affecting China’s agricultural development.The CSA(Community Support Agriculture)model has entered the public view as a new form to solve the quality and safety of agricultural products,and the CSA model also has some problems to be solved in the development process of China.Traditional greenhouse control systems are not sufficiently intelligent,and greenhouse management is inefficient in the CSA agricultural model,and there is a crisis of trust between users and consumers.In view of the above problems,this paper proposes a more systematic and intelligent implementation method of greenhouse control system,and designs an intelligent greenhouse control system based on IoT combined with CSA agricultural model.It is proposed to collect environmental information in the greenhouse through wireless sensor network technology,transmit the collected data to the cloud platform through the ZigBee-WiFi heterogeneous network,and then develop the web based on the cloud platform to design a terminal interaction platform connecting consumers and producers.Finally,consumers can remotely monitor the greenhouse environment and agricultural operations through the platform;producers can monitor the changes of environmental parameters in the greenhouse online through the platform,and realize automatic control of temperature and humidity in the greenhouse.The main work of the thesis is as follows: Firstly,the overall design of the system is completed based on the analysis of key technologies and functional requirements;then the hardware design of each node of the ZigBee sensor network is completed with the CC2530 module as the core in the sensing layer of the system;ZigBee-is completed in the transport layer.The software design of each node in the WiFi transmission network,and the ZigBee-WiFi gateway is studied.The coupling relationship between the temperature and humidity in the greenhouse and the decoupling algorithm are analyzed at the application layer,and the feedforward compensation decoupling algorithm and dynamic matrix control algorithm are used.The combination is used for automatic control of greenhouse environment,and the design and implementation of terminal web interaction platform is completed based on cloud platform.Finally,the research work is summarized and forecasted.Based on practical problems,this paper studies and designs intelligent greenhouse control system based on Internet of Things technology,which is of great significance to solve the current development dilemma of CSA agriculture and explore the integrated development of agricultural Internet of Things system.