Research On Agricultural Greenhouse Distributed Measure And Control System

Greenhouse is the important part of installation agriculture. Crop production in domestic and overseas greenhouses shows that advanced automation and management system for greenhouse will 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, illumination and CO2 density of greenhouse is designed. In order to provide benign vegetal environment, environmental parameters of greenhouse can be adjusted,and they always certain predesigned value, respectively using this system.The main idea in this paper is to design greenhouse computer distributed auto-control system. The system is a kind of principal and subordinate structure made up of one PC and several microcontrollers, principal CAN bus communication network and CRC validated algorithms to ensure data transmitted correctly. The local operation in greenhouse can be obtained by monitoring environment parameters and warning information can be read into PC.The working principle and main functions of the intelligent greenhouses with distributed control system in the paper are introduced, this system uses PC as a host computer and intelligent instruments with 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's 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, and system parameters can be edited by both host computer and intelligent instrument via panel.In the end, the characteristics are sumrized, such as easy to operate, convenient to expand and update, friendy to software interface , what's more, some respects to be improved and perfected are pointed out.