Research On Measure & Control System In Greenhouse Based On ARM-Embed

Along with the development of agriculture production and the progress of industry technology, all kinds of the agriculture greenhouse have been widely used in china and abroad. Greenhouse measure and control technology as an important part of the greenhouse production has been a key research at home and abroad. From 1980s, a series of research on the greenhouse measure and control system was done and the harvests were obtained in our country. But in view of the overall situation, Intelligentized degree or control strategy of the domestic measure and control system are lower than developed countries's. Because of the measure and control equipments from abroad need superior energy consumption and price, It can't meet the requirements of the domestic agriculture production. So, developing the greenhouse measure and control system which complies with China's actual conditions will play an important part in improving greenhouse goods quality, greenhouse economic benefit and greenhouse morden production level.With the emergence of powerful 32 bit ARM microprocessor, the development of control theory, and the maturity of Ethernet technology, It's possible to design a new kind of greenhouse measure and control system on these technology background.On analyzing respective merits and faults of the morden greenhouse, this paper puts forward a flat Ethernet solution for the greenhouse measure and control network., and puts forward a new kind of greenhouse system structure. It's more intelligentized and networked compares with former systems. At the same time, replacing traditional Fieldbus with Ethernet in the feld realizes direct communication from feld device to information management level, device level,control level and information management level are integrated seamlessly. The main research content as follows:In this paper a kind of greenhouse measure and control system witch adops ARM embedded microprocessor is designed. Hardware circuit includes MCU core circuit,data acquisition circuit,actuator driving circuit,man-machine interaction circuit,RTC circuit,acousto-optical alarm circuit and communication circuit and so on. Completing the modularization design of system software, witch includes data acquisition module,man-machine interaction module,acousto-optical alarm module,control algorithm module and communication module.According to greenhouse environment is a nonlinear,multivariate coupling,great lag,time-varying system, the fuzzy control algorithm is used in software design .Throughing combined debugging of hardware and software, the greenhouse measure and control system can adjust environmental parameters well, witch meets the best condition for plants growing.