FIELD: testing equipment.
SUBSTANCE: metal item is scanned with a probing signal, generated by a transmission device, and a signal arising in a defect metal item is received with the help of a receiving device, at the same time the probing signal is generated in the form of the 1st harmonic of the signal, and as the one reflected from the metal item, they receive the 3rd harmonic of this signal arising in the defect.
EFFECT: increased reliability of defect detection.
3 cl, 5 dwg
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