Research On Solar Energy Intelligent Irrigation Control System Based On Carbon Sequestration In Greenhouse

With the increase of population and the acceleration of industrialization in China,the impact of the increase of excessive carbon dioxide emissions on global warming has been widely concerned by human beings.Controlling or reducing carbon dioxide emissions is an important measure for human beings to protect the ecological environment.Although the increase of total carbon dioxide emissions has brought many adverse effects to human beings,carbon dioxide is also a useful resource,especially in agricultural production has many good USES,to promote the sustainable development of agricultural production has played a very important role.In this paper,the greenhouse carbon sequestration technology is used to improve the utilization rate of CO₂in agricultural applications.Greenhouse carbon sequestration means that plants can convert atmospheric carbon dioxide into carbohydrates through photosynthesis,and fix it in the form of organic carbon in the plant body,so as to improve the carbon absorption and storage capacity of crops,thus improving the utilization rate of CO₂gas fertilizer and reducing greenhouse gas emissions.The main research contents of this paper include:?1?Build a decision model of gas and fertilizer irrigationAccording to the planting environment of the greenhouse,a fuzzy control strategy with light intensity and temperature as variables was established.Lab VIEW panel as the upper machine,is responsible for various parameters of tomato growth?inside the greenhouse temperature,light intensity and CO₂concentration?,set of instructions issued at regular intervals to collect,receive sensor to upload the data,and introduced into the fuzzy control system,and then according to the established fuzzy rules under the current status of crop photosynthesis rate is maximum optimization,automatic output corresponding to the concentration of carbon dioxide.By comparing the model value with the theoretical value,the relative error of the two is less than 3.5%,which proves that the established model has a high precision.?2?Establish greenhouse carbon sequestration irrigation control systemAccording to the requirements of function analysis and performance analysis,the control system is divided into 5 modules,including login,liquid level/soil moisture monitoring,temperature monitoring,light monitoring and CO₂concentration monitoring.The system hardware mainly includes solar cell,circuit control box,water pipe,drip irrigation nozzle,greenhouse greenhouse,CO₂tank,sensor,PLC communication circuit,etc.,which completes the collection,transmission and man-machine interaction of various parameter information in the greenhouse,so as to build the greenhouse carbon sequestration and control irrigation platform.Design and develop G language program software based on Lab VIEW to realize the monitoring of greenhouse environment based on sensor network,operation tips,output and control of carbon dioxide concentration.?3?Tomato planting verification experimentThe experimental platform of fuzzy control irrigation based on greenhouse carbon sequestration was built,and the fuzzy control was realized by using Labview/PLC.Two groups of fertilization and irrigation experimental group and one group of natural growth control group were designed.The photosynthetic rate,plant height and the rate of change of tomato seedlings were measured by comparing the amount of fertilizer applied in the traditional natural growth group,trigonometric function group and gaussian function group.The results showed that the maximum growth of tomato plant height in the experimental group was more than43.41%,and the maximum photosynthetic rate was more than 53.67%.As for the above indexes,the gaussian function group exceeded 13.86%compared with the trig function group.The regulation errors of soil moisture content,carbon dioxide concentration,temperature and light intensity were all less than 4%.Through the control test,it is proved that the greenhouse carbon sequestration and control system is beneficial to the growth of crops,and relatively improves the photosynthetic rate and yield of crops.Experiments show that greenhouse carbon sequestration regulation system can improve the utilization rate of carbon dioxide and achieve the purpose of carbon sequestration and increase production.