| 摘要 |
<p>A piano automatic tuning device and an automatic tuning method thereof are provided. The piano automatic tuning device includes a piano body and an automatic tuning device. The automatic tuning device includes an audio frequency input device(1) and a filter(11), wherein the audio frequency input device(1) is connected with the filter(11). Higher-order harmonic wave of audio frequency signal sound waves of the audio frequency input device(1) are filtered out by using the filter(11), and the filter(11) is connected with a waveform amplifier(2), and waveforms filtered by the filter(11) are amplified by the waveform amplifier(2), and the waveform amplifier(2) is connected with a waveform shaping circuit(3), and the sound waves are inputted into a central processor(9) after the sound waves are shaped by the waveform shaping circuit(3), and the central processor(9) processes the frequency of the sound waves according to a standard frequency, and the central processor(9) controls a driving circuit(4), and the driving circuit(4) drives a regulating mechanism of the automatic tuning device. High precision tuning is realized, and meanwhile, full automation is realized in the whole tuning process.</p> |
