Automatic Control System On Co2 Concentration In Greenhouse

As our country realizes the comparatively well-off level basically, people's living standards generally improve, especially the Large and medium cities need to spply the fresh vegetables in anniversary, This needs to develop production of the greenhouse energetically.The modernized greenhouse production pursues the perfect combination of the labor productivity, the precision of the homework and social economic banefits, This makes monitoring and control of the environment of the greenhouse become inevitable. Environmental monitoring of the greenhouse, namely control the environment condition which influence crop growth, such as suitable temperature, humidity, illminance, CO2 density water content of soil, etc. According to the biological characteristic of the crop. Most greenhouses of our country produce and carry on the production process to manage according to experience at present. The technological means lags behind, labor intensity is great, production efficiency is not high, And existing computer control system is mostly to introduce foreign technology, With high costs, and is not fit for the domestic environment.In this paper, the system that originally studies utilizes automatic control technology of the computer, observing and control the course will totally be automatic. Realize that the density of carbon dioxide is adjusted and control automatically in the greenhouse. Systematic totality fixes up and ha/e four parts to make up , namely: Gather signal part, and deal with part, control and carrying out part, bunches of communication part in data. The software includes: the real-time Control module, the data- processing module, the intellectual control modde, the parameter-establish module, and the communication module, etc.Through research, the density of carbon dioxide is made to be in optimum value all right in this system in real-time control greenhouse. In order to offer a good environment for crop , it mainly have the following functions: Can measure the record of combining to the environmental factor; Can show the present measurement value in real time ; Can give a alarm when reach ultra limit ,and the amount of switch controlled is exported ; Can revise the data at any time via serial communication with PC ,and etc.This system have many characteristic such as operate easily, make policyintelligently run reliable, easy to expand, and etc. So long as this system is transformed a little, ones that can realize to other factors are observed and control, Or through increase sensor can realize some many goal factor observe and control more. The system can synthesize a part that the environment controlled as the intelligent greenhouse control room too as the detector. The system is taking 8031 single-chip computers as the core to observe and control the system, so should have the characteristics that the function is strong and with low costs systematically , Suitable for popularizing by a large scad among medium and smallscale peasant households.