The Research And Realization On Intelligent Control System For The Greenhouse Environment

The control technology of the greenhouse environment is the important aspect of the research on modern agriculture. To achieve quality cultivation with high yield and efficiency, the manipulation aim of the greenhouse environment is realized by controlling some equipment through analyzing the monitoring data of the internal and external of the greenhouse environment and according to crop growth rule. A new method to realize the intelligent control system of the greenhouse environment is proposed in the thesis by investigation on the control technology. The system applies some key technology:1.intelligent technology: including fuzzy-control algorithm, analogy expert system, self-diagnostics technology, and "PnP" technology for sensor;2.distributed system structure: with the help of pc, assistant functions such as the dada processing, the data printing and parameter configuration are completed. The MCS-51 is used as a bottom computer, which can independently run, finishes the entire control task. The system can automatically control the temperature and humidity of the air or soil, the sunlight, the concentration of CC^, the value of PH and EC of nutritional liquid in the greenhouse.The technology how to apply Data control and ADO control to dispose database, establish database, add database, access to database and display, print the charts in database by VB6.0, how to make use of MSComm control to finish the serial communication function with voltage conversion, how to make use of MCIWnd control to realize the function of multimedia, how to design the MPU software and hardware such as collecting data, processing data, controlling output, the serial communication interface, processing interrupt source, processing power down and applying the big screen LCD is discussed in the thesis.Based on investigation on related key technology, we have worked out the sample of intelligent control system for the greenhouse environment. The preliminary application of the system and the tested result of its operation have proved that this new method has achieved higher technical level and has great practical value.