Abnormal sound detection method for lifting camera module

The invention relates to an abnormal sound detection method for a lifting camera module. The abnormal sound detection method comprises the following steps: collecting audio data of the lifting camera module in a lifting process through sampling points; preprocessing the audio data to obtain a real part and an imaginary part of the audio data of each sampling point; fourier transform is carried out to obtain the amplitude intensity of the audio data of each sampling point; according to a preset frequency, removing an interference frequency band to obtain an abnormal audio frequency band of the lifting camera; calculating an energy value of the abnormal audio frequency band; the energy value is compared with a preset energy threshold, if the energy value exceeds the energy threshold, secondary re-judgment is conducted, and if re-judgment still exceeds the energy threshold, it is judged that the abnormal sound of the lifting module exceeds the standard; the Fourier transform can convert an audio signal in a time