液体注肥器定量控制系统的设计

摘要

针对目前液体施肥机的不足，设计了可以定量控制施肥量的注肥控制系统。系统采用电机带动离心泵输送液态肥料，通过计算注肥器管道中流量传感器的脉冲信号，获取系统实际排出的液体体积，根据实际施肥量与设定值的差值控制电机运转，从而实现根据实际需要精确控制施肥量。实际运行结果表明，该系统运行可靠，系统对施肥控制量误差相对比较小，可以在一定程度上实现精准注肥，减少肥料浪费。%Because of deficiency of the liquid fertilizer applicator , the weighing control system of liquid fertilizer injector was designed .The liquid fertilizer is delivered by a centrifugal pump which adopts the motor drive .Through the calcula-tion of the flow sensor pulse signal in the pipe , the controller gains the actual discharged liquid volume .The difference between the actual value and the set value determines whether the motor running .The fertilizer control error of the system is relatively small , the crops can be fertilization accurately and the fertilizer waste can be reduced in a sense .