Research On Agricultural Greenhouse Distributed Measure And Control System

Greenhouse is the vital Part of installation agriculture. The facts in Crop Production in domestic and overseas greenhouses proves that the automation and management system for greenhouse could improve the efficiency of agriculture Production. In this Paper,intelligent greenhouse,as the focus of agricultural greenhouse field,is studied,and a measure and control system which can control Parameters of temperature, humidity, CO2 density and soil humidity of greenhouse is designed. In order to provide benign vegetal environment, the parameters of greenhouse environment can be adjusted and then be remained in preestablished value automatically by the system. The main idea in this Paper is to design computer distributed auto-control greenhouse system. This system is made up of one PC and several microcontrollers, and the data is transmitted by RS-485 bus communication network.. The local operation status in greenhouse can be obtained by monitoring environment Parameters and these information can be stored into PC. The working principle and main functions of the greenhouses with distributed control system in the paper are introduced. This system uses PC as a host computer and MCS-51 single-chip microcomputers as secondary computer systems. The design methods of system hardware and software are fully described. The system is mainly composed of environment factors inspecting module,intelligent decision-making module,data processing module,database manage module,parameters-editing module and so on. In these modules,the functions of real-time control and intelligent decision-making is mostly realized by intelligent instrument,data processing and database manage is completed by PC host computer. In the end,the characteristics are summarized, such as easy to operate,convenient to expand and update,friendly software interface,what's more,some aspects that should be improved and perfected are pointed out.