| The agriculture, which we human beings and our civilizations are dependent on, is the ultimate factor in our national economy. Even though our country is a big agricultural country, the human numbers are increasing and the area of cultivated land is decreasing, we are running short for the average area for cultivated land. So how to run a high efficient agriculture is the main research direction of the agricultural technology in nowadays. The greenhouse with advanced technologies and scientific management can help to increase the output value of the agriculture by control the growing environment, and regulate the environment factors in the greenhouse.Plant’s growth can be affected by the temperature, humidity, light, the concentration of carbon dioxide and other factors in its environment. A suitable environment can help us shorten the crops’growth cycle and get high quality, high efficiency, high benefit products. The points of environment control are the acquisition and transform of the environmental data. Through timely data feedback, people can regulate the temperature of the indoor environment. But the traditional parameter collection needs a large number of wiring, and the signal is vulnerable to interference and loss in the transmission process, it’s not conducive to the timely, accurately grasp the changes of greenhouse environment.In this research, we bring a development soft which based on virtual equipment develop plat LabWindows/CVI and an interaction interface which is fully graphic to the traditional greenhouse temperature testing system. Adding a Microcontrollers technology from ICC AVR, the new system can make the greenhouse environment detecting and long distance control to be true.The hardware is formed with proper environment testing sensors (Air humidity sensor, soil humidity sensor, Illuminance sensor, Carbon dioxide sensor). Microcontrollers and its periphery chips and the optimum control circus.The software has two parts:the master system and slave system. The slave system which is created around by Microcontrollers and C language, can independently accomplish the environment parameter acquisition, data processing, liquid crystal display and output control functions. And the master system formed by LabWindows/CVI which is the virtual instrument development platform, it runs the functions as setting, communication types selection, warning, figures indication and store and so on.Messages between master system and slave system are communicated by radio frequency technology which could achieve data transmission and long-range control of greenhouse environment. |
