柑橘园低功耗滴灌控制器的设计与实现

为提高偏远山区柑橘园滴灌的管理效率，降低劳力投入，节约生产成本，利用低功耗设计技术研制了一个以干电池供电的滴灌控制器。控制器主要由ATMega88V单片机、电源电路、人机交互单元、双稳态脉冲电磁阀及其驱动电路组成。以可调数字电源提供0～10 V直流电压，分别在0～0.9 MPa管道水压条件下，测试了控制器的耗电情况，试验结果表明，控制器能驱动电磁阀开关动作的最低工作电压为3 V，电磁阀开关动作的电流随电压的升高而增大，水压条件对电磁阀开关动作电流影响不显著，当电压＞5 V时控制器的静态电流为50 μA，当电压从5 V下降至3 V的过程中，静态电流逐渐上升至最大值149.2 μA。采用型号为6LR61的9 V碱性电池作为电源，并使控制器每休眠5 s则驱动电磁阀开或关动作一次，以测试控制器连续工作于大负载下时的电池使用寿命，试验结果表明，电池可工作364 h，共驱动电磁阀开关动作272 160次。根据试验结果估算出，一节额定容量为2 500?mA·h的9 V电池可使控制器工作5 a以上。该控制器成本低，操作简单，适合于中小面积柑橘园的滴灌自动控制。

Design and implementation of low powered drip irrigation controller for citrus orchard

A low cost drip irrigation controller powered with battery was developed for applications in remote mountainous citrus orchards.This controller was designed to improve drip irrigation management efficiency and reduce the labor inputs,which in turn reduces the production cost.It is mainly composed of an ATMega88V microcontroller,power supplying circuit,human-computer interaction unit,pulse solenoid valve and its driving circuit.Power consumption of the controller was measured in 0-0.9 MPa pipe water pressure...