Air conditioner indoor unit abnormal sound detection method based on sound classification model
A technology of air conditioner internal unit and classification model, applied in speech analysis, instruments, etc., can solve problems such as one-way analysis, and achieve the effect of improving accuracy, improving manufacturer's reputation, and improving user experience
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Embodiment 1
[0084] A method for detecting abnormal sounds of air-conditioning indoor units based on a sound classification model, such as Figure 6 As shown, the detection method includes:
[0085] (1) Collect and record the operating sound signal of the air conditioner internal unit through the soundproof room;
[0086] (2) intercepting the abnormal part in the sound signal that step (1) obtains, slicing the intercepted abnormal part, and marking each segment according to the abnormal type;
[0087] (3) Intercept the normal part in the sound signal that step (1) obtains, slice the normal part intercepted, and mark each segment as normal sound;
[0088] (4) Fast Fourier Transform (FFT) is performed on all segments in step (2) and step (3), and the energy spectrum is obtained by square, and the Mel spectrum is obtained by Mel filtering, and the Mel spectrum feature is extracted based on the Mel spectrum ;
[0089] (5) Perform logarithmic compression on the amplitude of the Mel spectrum,...
Embodiment 2
[0098] According to a method for detecting abnormal sound of an air conditioner indoor unit based on a sound classification model described in Embodiment 1, the difference is that:
[0099] In step (1) and step (8), when collecting and recording the running sound signal of the air conditioner internal unit, the sampling rate is 48000 Hz, and the monophonic 32-bit storage format is adopted. According to the setting, the air conditioner has to go through two stages of low wind speed mode and high wind speed mode, and the duration of the two stages is fixed. Since the sound of the air conditioner in the high wind speed mode has higher loudness and frequency, the abnormal sound is covered up, so only the sound data of the low wind speed mode is used for quality inspection. It is difficult to distinguish the air-conditioning sound signals collected in steps (1) and (8) in the time domain, such as figure 1 shown. Therefore, the present invention uses the method described in step (...
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