The STC12C32S2 single-chip microcomputer is used as the core of the sound guidance system, and the STC single-chip microcomputer is used as the controller of the movable sound source. A 1W small speaker is used as the sound source to emit a periodic audio pulse signal with a continuously adjustable frequency of 10-10kHz and 10mS-10S. The DC motor driven by the MMC-1 ASSP chip can move arbitrarily in the stadium. The sound is received by the microphone, and the audio pulse signal is extracted from the ambient noise based on the intelligent filtering and audio pulse signal recognition algorithm, thereby calculating the position of the movable sound source in the stadium. The saturated PD control algorithm is used to control the movable sound source to approach the center line OX and the midpoint W, and the wireless communication module is used to transmit the movement command to the displacement of the movable sound source. The test shows that the system can meet the requirements of the basic and performance parts of the competition.
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