The Research And Implementation Of Monitoring And Control System Based On Adaptive Fuzzy Control In Greenhouse

With the development of wireless communication,mobile software and traditional hardware technology,the Internet of Things has become a hot technical system.It has been widely used in various fields,injecting new vitality into many traditional industries.The combination of the Internet of Things and traditional agriculture can automatically monitor and control the facility agriculture such as greenhouses.The environmental data of the greenhouse is collected and transmitted back to the system through sensors.The system receives the returned environmental data,in order to meet the crop growth needs,improve crop yield and growth efficiency,the environmental parameters need to be adjusted through the control equipment.At present,some greenhouse system has problems such as backward communication mode,inefficient control method and lack of adaptability.To solve these problems,a greenhouse environmental monitoring and control system based on adaptive fuzzy control is researched and developed.The system realizes real-time collection of environmental parameters of facilities agriculture and can monitor historical data.It can also choose manual control mode or automatic control mode to regulate equipment in the greenhouse.The system realizes the greenhouse Intelligent management of agriculture.The main work of this paper are as follows:1)By analyzing the demand for hardware performance and data transmission in greenhouse agriculture,a design scheme of greenhouse environment monitoring and control system based on Internet of Things technology system is proposed.The ?CO/SII system is transplanted to the hardware program on the sensing layer,the external interrupt is used to ensure the rapid execution of the high priority task.At the same time,the 4G module is used as a gateway to interact with the application layer.In order to ensure the transmission of real-time data and control signals of the sensor,end-to-end communication based on the XMPP protocol is used at the network layer.2)The environmental parameters in the greenhouse have the characteristics of mutual coupling and mutual influence.For these characteristics,a multiple-input and multiple-output(MIMO)fuzzy controller is designed to regulate the greenhouse environment.The method takes as input the difference between the four variables(temperature,relative humidity,illumination,and carbon dioxide content)and the target value.The output control device contains: the on/off of the heater and the fill light,the opening time of the humidifier and the fan.This achieves the regulation of the greenhouse environment.3)Aiming the problem of lacking adaptability,an adjustment factor is set for each result of each rule in the fuzzy controller,which is used to enlarge or reduce the result.Then the adjustment factor is continuously trained to make it more relevant to the current environment.Finally,the effectiveness of the algorithm is proved under simulation experiments.4)After analyzing the architecture of the greenhouse environmental monitoring and control system,the sensing layer,network layer and application layer of the system are designed.The sensing layer realizes the collection of greenhouse environmental data and controlling of equipment.The network layer realizes the real-time communication of data and preservation of historical data.The application layer realizes hardware binding,real-time data viewing,historical data viewing,and manual device controlling.