Abstract
The greenhouse is uses for the cultivated plant the critical facility constituent, the domestic and foreign greenhouse crop production's experience indicated that enhances the greenhouse the automatic control and the management level may display the greenhouse agriculture fully highly effective. Along with the sensing technology, the computer technology and mechanics of communication's rapid development, modernized greenhouse information automatic gathering and the intelligent control system's development has become the present facility agriculture a research hot spot.
This article in the consult massive domestic and foreign reference's foundation, has outlined the greenhouse in the domestic and foreign historical development as well as the development present situation. Introduced the domestic and foreign greenhouse observation installment development tendency and the development direction, and affects the environment factor which according to the greenhouse in the crops grow, namely environment and so on temperature, humidity, illumination and carbon dioxide conditions, the control characteristic and the control method, proposed suits this system's environment factor control plan.
In based on the CAN bussing technique, this article has designed factor and so on temperature, humidity, strength of illumination and carbon dioxide density control systems. The sensor examines the signaling carries on the data processing to the monolithic integrated circuit, realizes through the CAN main line to the environment factor survey and the control. The greenhouse environment has the high request to the real-time response and real-time processing ability. Based on this characteristic, from low cost angle embarking, proposed based on the plant physiology information database's CAN controller greenhouse environment supervisory system, and made the quite detailed analysis on its software and hardware design, this article introduced the greenhouse environment supervisory system's hardware with emphasis. Elaborated in the greenhouse environment various parameters regulation, the system has the stable property, the moderate cost the characteristic; Has pointed out its application prospect.
Uses simply reliably the component on the electric appliance hardware aspect as well as the execution mechanical organization. Introduced various part of design concept, the schematic circuit as well as the antijamming method, and has given the system total hardware schematic diagram; Moreover, in satisfies the system design request under the premise, selects the price to be low as far as possible, the power loss low primary device, achieves reduces the system cost the goal.
Finally, to designed has carried on the summary, introduced this article completed the prime task, showed this article characteristic and the significance, simultaneously, had pointed out system design's insufficiency and the improvement mentality, have built the foundation for the next topic's further research.
KEY WORDS: Greenhouse environment, supervisory and control system, sensor, CAN bus