GOA-VMD-based ultrasonic signal optimization method and device, and storage medium

Abstract

The invention relates to the technical field of ultrasonic signal processing, in particular to a GOA-VMD-based ultrasonic signal optimization method, which comprises the following steps of S1, optimizing a modal number and a penalty parameter of variational mode decomposition VMD through a grasshopper optimization algorithm GOA to obtain an optimal VMD parameter, the variational mode decomposition (VMD) decomposes the ultrasonic echo signal according to the optimal VMD parameter to obtain a high-frequency IMF component and a residual IMF component; s2, performing adaptive threshold denoising on the high-frequency IMF component to obtain a denoised high-frequency component; and S3, reconstructing the de-noised high-frequency component and the residual IMF component to obtain a reconstructed signal after de-noising. According to the method, the global optimization capability, the adaptive decomposition capability and the refined denoising capability are integrated, high-efficiency denoising of the signals can be realized under a complex noise background, the signal-to-noise ratio is improved, and the integrity and fidelity of the signals are kept at the same time.

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