FIELD: flaw detection of metals.
SUBSTANCE: invention is intended for flaw detection of metals by acoustic noise. The substance of the invention lies in the fact that noise records with a high sampling rate are recorded on the investigated area of the metal, the resulting noise records are divided into fragments, then the Fourier transform is done in these fragments, calculating their amplitude-frequency spectra, then in the obtained amplitude-frequency spectra for each point of registration of noise data, the power of the registered signal is calculated by integral summation of its spectrum in a time window equal in length to the record and less than the length the shortest noise record, and by reducing the power of the total signal relative to the total measurement area, the presence of an area with an internal defect is determined.
EFFECT: providing the possibility of implementing a universal in relation to the objects under study, a high-performance method for flaw detection of metals by acoustic noise.
2 cl, 4 dwg
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