  This paper mainly introduces an infrared optical communication system based
on stable and handstand pendulum. This system adopts the method of loading the
infrared light emitting end on an handstand pendulum to realize the stability
and controllability of the infrared light transmission light path. In this
system, 940nm infrared light is mainly used for audio signal transmission, and
an handstand pendulum based on PID is used to control the angle and stability
of infrared light emission. Experimental results show that the system can
effectively ensure the stability of the transmission optical path and is
suitable for accurate and stable signal transmission in bumpy environments.
