A Study Of Controlling System With Analysis Of Greenhouse Synthetic Environment

During the development of industrialized agriculture in our country, it is the weak basic research on the relationship between indoor crop growth and environmental factors, that makes the modern agriculture facility and control system to develop their efficiency, which even has hold back the process of industrialized agriculture seriously. Aiming at the moving of weak, the periodic change regulation of the main restrict factor in plant production such as temperature , humidity , illumination, CO2 concentration-airflow speed, as well as control system are all made a research in the paper.The research firstly concluded the balance mathematic model in atmosphere, frond and ground heating energy in the principle of the energy equilibrium, which simulated varying curve on temperature, humidity , intensity of illumination under the condition of high rate photosynthesis by means of Runge-Kutta theory, which established mathematic mode about dynamitic supplying flow state of CO2, and made sure the relation between the concentration of CO2 and ventilation rate. In the research of pursuing truth, the automatic monitoring and recording datum about every environmental factor under the different condition have been analyzed with method of mathematic and physic statistic. Then, by contrasting the real varying curve and optimized curve, it is the adjusting range that was defined in the overlapping areas of two curves.In order to realize the optimized control of major environment factors, the intelligent control system of greenhouse synthetic environment was designed, the corresponding system platform was set up adopting the technology of facing object and language of VB. Using the fuzzy control theory and blocking designing method, e the system state setup, control parameter enactment, real-time collecting monitoring, fuzzy control, historic date requiring and system help function was realized. The software was run and proved that the system surface is friendly and the operation is convenient.However, the relationship between environment factors and plant growth is so complicated and various, that this text only make the study partly, and the control system needs to be examined and perfected further by run in later.