CPC F03D 17/00 (2016.05) [G06F 18/22 (2023.01); F05B 2260/83 (2013.01); F05B 2270/709 (2013.01); F05B 2270/81 (2013.01)] | 9 Claims |
1. A method for inspecting a wind turbine blade, wherein the wind turbine blade is a blade in a wind power generation device, the wind power generation device further comprising a tower provided with a sound acquisition device that is mounted away from the wind turbine blade; wherein the method comprises:
acquiring, via the sound acquisition device, a sound signal in response to an impingement of wind on the wind turbine blade, wherein the sound signal comprises a sound signal generated by sliding of air between blades in the case that the wind impinges on the wind turbine blade;
extracting a signal envelope from a time domain signal diagram formed by the sound signal by calling a signal analysis algorithm;
determining a position of a point, where a wave trough appears on the signal envelope, in a time domain as a segmentation point; and
converting the sound signal into a frequency spectrogram, and obtaining a segmented frequency spectrogram by segmenting the frequency spectrogram based on the segmentation point; and
obtaining a damage recognition result of the wind turbine blade by performing image recognition on the segmented frequency spectrogram based on a damage recognition model, wherein the damage recognition model is obtained by training a neural network model.
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