In agricultural production, spray irrigation of crops is very important. In order to enhance the efficiency of irrigation, the water sprinkler usually need an automation control of the time and the duration.. The purpose of this thesis is to provide a system that can irrigate at certain time, witch is determined by the environmental parameters that come from sensors. The system use DS1302 as main chip of its timing module, and DS18B20 as its temperature sensor. AT89S52 accept the timing and temperature signals, and show them on the LCD1602-a 16 by 2 LCD display. The time and duration of sprinkler irrigation is determined by the timing signal and the temperature parameters. The months also influence the duration of sprinkler irrigation. The system use modular design, the hardware circuit has simple structure, Data transmission use digital transmission, and work stability and exactly.
Key words: Automatic sprinkler, Time, Temperature acquisition