通过单片机控制气缸的伸缩过程，模拟按下按键的过程。同时检测灯板按键上的电信号是高电平还是低电平。做出相应的反馈。-Telescopic cylinders by SCM process, simulate pressing the key process. Simultaneously detect electrical signals keys on the light board is high or low. Make the appropriate feedback.