Study On Greenhouse Environment Control System Based On Labview Technology

Environment is a vital impact for the growth of fruit trees,implementation ofcultivation technology,the prevention of plant diseases and insect pests.Data acquisition is an important part of environment monitoring.For a long time,Greenhouse environment monitoring commonly was obtained by means of artificial means,which took time and human resources,and was easy to get the external influence.Efficiency was poor.Virtual instrument technology provides a perfect solution for data acquisition automatically and real-time monitoring remotely.Therefore,data acquisition and remote monitoring of Greenhouse environment based on virtual instrument is of great significance for directing actual production of the Greenhouse.Virtual instrument emphasizes a new concept that software is the instrument,which is a computer instrument system that software based on user requirements defines general-purpose measurement and control hardware functionality.Virtual instrument have three basic functions including data acquisition,data analysis,result output and display,but real-time data acquisition automatically is the best basic function. Virtual instrument can define and design test function by users,so which function is richness,are easy to construct,and is used widely. In this paper,we firstly summarized the background and significance of the research,then we expounded virtual instrument technology and its development tendency,and emphasized Labview development platform.Finally,we realized real-time and remote monitoring system of Greenhouse environment based on Labview,which breaks a new approach.Labview is a virtual instrument development platform of NI Company made based on graphical programming language,which is the development of high efficiency of a graphical language at present.The main content and key technology on our research work is as followings:◆We discussed the theory and technology of virtual instrument,analyzed Labview development platform and its application status.and lucubrated feasibility and necessary of application that virtual instrument was used in Greenhouse environment monitoring.◆According to requirement of Greenhouse environment sample speed,we advanced the project of real-time data acquisition of Greenhouse environment and key technology of system realizing.The system realized that computer controlled instrument byRS232 serial,but Labview realized serial communication by VISA node.Block design and multithreading synchronization processing technology simplified development of program and advanced running efficiency of program.◆Based on DDL-210 hardware equipment of some sensors and data acquisition module etc.,we completed real-time data acquisition system of Greenhouse environment taking Labview as the core.The system has stable,reliable,interface-friendly characteristic,which realized automatic acquisition,real-time display,analysis,storage and so on of Greenhouse environment information.◆On the basis of lucubrating DataSocket and Remote Panels technology,wediscussed remote transfers,sharing and issuance of Greenhouse environment data,which realized on-line monitoring and controlling of network of Greenhouseenvironment.