Design Of Watermelon Greenhouse Monitoring System Based On Variable Universe Fuzzy Control

With the vigorous promotion of rural economic revitalization,the traditional agricultural production model has been unable to meet production demand.It has become an inevitable trend to combine information technology with traditional industries.Facility agriculture represented by greenhouse ushered in new development opportunities.Temperature control is very important in greenhouse system.This paper designs a temperature control method for watermelon greenhouse and develops a watermelon greenhouse monitoring system based on variable universe fuzzy control combined with the actual situation of watermelon planting in greenhouse.First of all,this paper analyzes the problems existing in the existing greenhouse.In view of the current situation of poor interaction ability of greenhouse environmental information and low control accuracy of environmental factors,this paper proposes to use wireless sensor networks combined with variable universe fuzzy control to design a greenhouse environmental monitoring system.Secondly,taking watermelon as the research object,based on previous research results and experience,the suitable growth temperature for greenhouse watermelon at each growth stage was summarized.The polynomial curve fitting method was selected as the temperature control model,and an appropriate temperature control threshold was selected.Based on this,this article developed a temperature control strategy for watermelon greenhouse.In the research of core control algorithms,an adaptive variable universe fuzzy control algorithm based on WOA(Whale Optimization Algorithm)was proposed to address the problems existing in existing variable universe fuzzy control optimization algorithms.The performance of the algorithm was tested,and the experimental results showed that the algorithm proposed in this paper has significant improvement in overall performance.Finally,the hardware and software of the system are designed.First,the wireless sensor network,Internet of Things gateway and control circuit are designed according to the hardware structure of the system.According to the system software structure,the wireless sensor network coordinator node and terminal node,Internet of Things gateway,server interface and temperature control algorithm in the system are designed respectively.After the system software and hardware design is completed,each module of the system is tested,including hardware test,wireless sensor network communication test,Internet of Things gateway data upload test,upper computer interface communication test,and the test results show that the system can meet the expected design requirements.