The Research Of Greenhouse Environment And Crop Growth Monitoring And Control System

Our country has more people than arable land and large amount of labor is used intraditional extensive agriculture and resource utilization is low and agriculture output has lowreturns.Developing intensive streamline type agriculture becoming more and more needed fortoday’s society. Greenhouse agriculture is an important part of intensive agriculture andimproving greenhouse agricultural automation, intelligent degree will help our countryagricultural development to the next level.Greenhouse environment is a multi-variable and strong coupling complex system. Itprovides suitable temperature, humidity, light and CO2for crops to grow, including theseconditions temperature and humidity, have more influence on crop growth and not easy tocontrol. Temperature change will affect humidity as the same humidity change will also affecttemperature in the greenhouse.This article selects PID algorithm to adjust temperature ingreenhouse. PID is an algorithm which is simple structure and strong operability. We shouldconsider the influence in humidity when we change temperature in greenhouse. Therefore thearticle make the temperature and humidity as research object, and make the greenhouseenvironment monitoring system as testing platform to research the influence when temperatureand humidity has change. The main research method is to do experiments which use heatingequipment, cooling equipment and humidifying equipment in greenhouse. And research theinfluence between temperature and humidity using statistical analysis software Excel and SPSS.From the experiments result we can know that there is a linear relationship between temperatureand humidity when the system has the raising temperature process, cooling temperature process,humidifying process and reducing wet process. Therefore the article design the temperature andhumidity control scheme based on the relationship between temperature and humidity in order tomeet the needs of crops growth.Sunlight greenhouse environment monitoring system is composed of environmental sensorsPLC cameras monitoring software and so on. Among them PLC is the core control. Theapplication program of PLC is written by ladder chat and the application programs can realizecontrolling displaying and communication of the system. PC monitor program written byDelphi7. It has the functions of environment information displaying data analysis and data export.Through the long time test, the system has high stability simple operation, easy maintenance and it can be used in practical production.