一种基于单片机的棉花打顶高度控制系统,采用超声波和传感器进行株高测量,包括控制模块、株高测量装置、速度感应装置、升降装置和打顶装置。(A cotton top cutting height control system based on single chip microcomputer, which adopts ultrasonic wave and sensor to measure height of the plant, in