The Intelligent Monitoring System Of Greenhouse Based On ZigBee Technology

China has mastered the core technology of intelligent monitoring system of greenhouse,but it cannot be widely used because of its high cost.Greenhouse environment parameters are mainly controlled by artificial experience rather than scientific management.Therefore,this kind of fruit and vegetable in the greenhouses can meet the requirement of anti-seasonal and cross-regional,but the output is low and the cost is high.In order to solve this problem,a greenhouse intelligent monitoring system based on ZigBee technology is designed,which contains sensor,ZigBee wireless network,data fusion method,ASP.NET,database and other advanced technology.Inthedatacollectionendofgreenhouse,theoriginal environmental data collected by sensors,including temperature,air humidity,CO₂ concentration,light intensity,and soil moisture content,are transmitted to the gateway through the ZigBee wireless network.ZigBee wireless network is the preferred technology in the era of Internet of things.It has the characteristics of short distance,low speed,low complexity,low power consumption and low cost.It is mainly used for short distance wireless communication,and is widely applied in the field of digital home and industry.After the in-depth study of ZigBee technology related theories,the ZigBee network nodes are set up by CC2530 F256,including the coordinator,routers and terminal nodes.A tree topology ZigBee wireless network is formed.The CC2530 is a real system on chip?SOC?solution and combines with the ZigBee protocol stack to provide a complete and powerful ZigBee solution.Data fusion technology is the key technology of making decision in the era of massive data.The technology has achieved remarkable results in the field of military industry.Now it has been applied in many fields,such as medicine,industry,process control,robotics and so on.Massive data can greatly improve the accuracy of judgment after data fusion.Greenhouse environmental data have many characteristics,such as large scale,nonlinearity and coupling.Relying on single environmental factors,it is not enough to accurately describe the overall status of greenhouse.In this paper,a distributed two level fusion algorithm which is combined with adaptive weighting algorithm and iterative D-S weighting algorithm,is applied to greenhouse environmental data fusion.The control command is adopted to achieve intelligent control in greenhouse according to the fusion result.The upper computer system is an intelligent monitoring center based on B/S?Browser/Server?mode.The Web Server interface is developed by using ASP.NET technology under Visual Studio 2010.SQL Server 2008 database technology is applied to store greenhouse data and other data.In the upper computer,users can use browsers to monitor real-time data and query historical data in greenhouse.In this greenhouse intelligent monitoring system,the sensors collect the greenhouse environment data in real time.The data is transmitted to the gateway through the ZigBee network.After the data is transmitted through the serial port,the data is stored in the database of the upper computer.The decision results are obtained after the environment data is fused.The system sends the corresponding control commands according to the decision result.