【摘要】 基于PWM技术设计了一种闭环控制肥料抛撒幅宽调控系统。设计并确定了系统电路、传感器安装和PWM闭环反馈方法以及阀门开启最小占空比等参数。通过试验建立了幅宽与圆盘转速的关系,该系统可根据作业需要直接输入幅宽,使圆盘能够按照指定的转速进行抛撒作业,进一步提高了机具的可操作性和智能性。试验表明:在不同作业速度和不同抛撒幅宽试验下,实际抛撒幅宽与目标抛撒幅宽之间误差最大值为5.50%,最小值为2.86%,能够较好地满足实际生产要求。更多还原

【Abstract】 A closed loop control system for adjusting fertilizer scatters breath was developed based on the PWM technology.The module circuit,sensor installation and close-loop feedback method were designed.The relation of disc rotation speed and scatters breath was built with experiment.The breadth value could be input to system directly according to the operation needs,so the rotating disk could work under specifying speed which improved operated performance and intelligence of the machine.Experiment showed that with the different operation speed and different width scatters,the maximum error and the minimum error between actual scatters breadth and target scatters breadth was 5.50% and 2.86%,respectively.The designed system can meet the practical production requirements.更多还原