通过提升机械传动轴的转角脉冲计数,将计数值与预置值作对比,即可确定驱动电机的启停升降,达到平层就位的目的.以AT89C51为CPU,在中断处理程序中对外来脉冲计数.-Through enhancing the mechanical shaft angle of the pulse count, will be of value for comparison with preset values, you can determine the start and stop the motor-dri