Greenhouse Microclimate Analysis And Its Application Based On Internet Of Things Technology

At present,most of greenhouses in China still rely on human experience for production management.The inability to scientifically grasp the microclimate changes in greenhouses has resulted in low yields and low economic benefits for greenhouse crops.Therefore,based on the agricultural Internet of Things technology,this paper focuses on the analysis of greenhouse microclimate in the greenhouse in Zhejiang Province and its application.First,the greenhouse monitoring system based on the Internet of Things was designed and built.The system consists of wireless acquisition nodes,intelligent gateways,and control centers to complete the real-time monitoring of the greenhouse environment.The wireless acquisition node integrates some types of sensor modules to collect environmental data.The data were sent to the gateway node through the Zig Bee,and then forwarded to the server through the Wi Fi and the GPRS.The control center completes functions such as the storage and display of greenhouse environmental data.Secondly,after obtaining data through multi-point measurement,the greenhouse microclimate was analyzed and researched.This paper describes the daily variation of light intensity,air temperature,air humidity,and soil temperature in greenhouses under different weather conditions in winter,and fully understands the spatial and temporal distribution of relevant environmental factors in greenhouses.Then,a combined method for temperature and humidity prediction based on empirical mode decomposition(EMD)and wavelet neural network(WNN)is proposed.Starting from the characteristics of the research object,this method combined with the advantages of two ways,and used the idea of multi-algorithm fusion forecasting.The results show that the EMD-WNN combined model can improve the accuracy of short-term greenhouse temperature and humidity prediction.Finally,based on the analysis of greenhouse microclimate,its application model was studied.Greenhouse microclimate analysis not only provides feasible guidance in crop cultivation and management,but also provides theoretical basis for environmental regulation in greenhouses.Grasping the rules of microclimate change in greenhouses can make greenhouse production and management efficient and balanced development,thus improving the modernization level of greenhouses.