Research And Application Of Greenhouse Environment Monitoring System Based On WSN

Raising farmer's income and reducing production costs are the urgent needs of the vast number of agricultural producers.In recent years,with the progress of agricultural science and technology and the development of rural economy,modern greenhouse construction technology is developing rapidly.At present,there are generally two kinds of greenhouse environmental monitoring system in China,one is manual monitoring,the other is wired monitoring.These two ways are more or less wasteful of resources and high cost.This paper designed a greenhouse environmental monitoring system based on WSN to delay the life cycle of WSN and complete the task of environmental data monitoring.The main contents of this paper are as follows:Firstly,this paper summarizes the function and influence of greenhouse on agricultural production,expounds the importance of building greenhouse monitoring system by using WSN,analyses the advantages of WSN compared with other wireless networks from the characteristics and architecture of WSN,and expounds the significance of topology control,classification methods and analysis and comparison of classical topology control algorithms.Secondly,in order to select cluster heads more reasonably,avoid the problem of network hotspot and unbalanced energy consumption,a particle swarm optimization(CE-PSO)algorithm based on catfish effect optimization is proposed.Firstly,aiming at the disadvantage of premature convergence of classical PSO algorithm,catfish operator(deviation threshold)is introduced into the iteration equation of the algorithm,and random perturbation of global or individual extremum is carried out by the operator,thus changing the aggregation state of particles at the local optimum position and avoiding premature falling into the local optimum.At the same time,based on the idea of non-uniform clustering,when designing the fitness function,we measure the nodes from three aspects: the residual energy of nodes,the distance of base stations and the compactness of clusters.The simulation results show that the proposed algorithm prolongs the lifetime of the network to a certain extent and improves the energy consumption balance of the network.Finally,this paper combines the optimized clustering algorithm with greenhouse monitoring environment,and designs a greenhouse environmental monitoring system based on WSN.According to the use environment and functional requirements of the system,CC2530 chip is used to carry sensors to complete data acquisition,IAR software is used to compile protocol stack program,LabVIEW software is used to develop the upper computer monitoring system,and alarm values are set according to the requirements of each parameter.The functions of real-time display,query and alarm of collected data are realized on PC.Tests show that the system is efficient and stable,and can better meet people's needs for greenhouse environmental monitoring.