Patent ID: 11905926
Assignee: SHANGHAI ENVISION DIGITAL CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 5:
6. The method according to claim 2, wherein calculating the sound spectrum difference factor in response to the impingement of the wind on the wind turbine blade based on the segmented frequency spectrogram comprises:
calculating a signal-to-noise ratio of the sound signal based on the segmented frequency spectrogram;
calculating the sound spectrum difference factor in response to the impingement of the wind on the wind turbine blade based on the segmented frequency spectrogram in the case that the signal-to-noise ratio is greater than a signal-to-noise ratio threshold; and
determining that the sound acquisition device encounters a failure in the case that the signal-to-noise ratio is less than the signal-to-noise ratio threshold.