Automatic Irrigation System Powered By Solar Energy

Agricultural development cannot leave irrigation, accurate and reasonable irrigation can notonly increase grain yield, but also saves water resources;There are many problems in agriculturalproduction of our country ,such as inconvenient transportation, difficult energy supply.Pumpingpower is not easy to obtain. This paper designed the solar automatic irrigation system,which cansolve the problem of power shortage in remote areas and improve irrigation efficiency. The systemcombined photovoltaic technology and measurement and control technique. The paper studiedfuzzy control , manual control and time control. The system structure is based on the client/server .The client is placed at the site and the server is placed in the monitoring room .Through wirelessdigital transmission broadcasting station ,the server could monitor the clients. This paper mainlystudied the following parts:(1)Studied on crop water requirement information control method. Studied fuzzy controlcombined with manual control, time control for different irrigation object.(2)Studied on a small independent photovoltaic power supply device for system.Compute thenumber of the solar panel and capacity of battery and inverter，according to the electricity demandof system and local solar radiation.(3)Researched and developed man-machine interaction system for solar automatic irrigationsystem. Using touch screen as client’s interface, which is convenient for the user to read and inputdata; Server’s interface was developed by Visual C + + 6.0, which is used for the centralizedmonitoring of three clients.(4)Researched on communication technique for solar automatic irrigation system. In the client,mcu and touch screen are connected with serial port line, based on modbus protocol ,using wiredcommunication ways. Between sever and three clients,wireless communication was used throughwireless digital transmission broadcasting station.Custom protocol was designed according to therequirements of system communication.(5)Developed prototype for solar automatic irrigation system. Completed three prototypesaccording to the needs of the project, which is compact and delicate.In order to test the function and performance of solar irrigation system, this paper designed thedata acquisition experimental, data communication experimental and irrigation mode experimental.The soil temperature sensor was also analyzed by experimental calibration. Tested the sensorperformance ,through the data acquisition experimental; Tested the success rate of communication for the system ,through the data communication experimental. Tested the effect of irrigationcontrol.,through the irrigation mode experimental.