FIELD: quality control; acoustic engineering.
SUBSTANCE: device has magnetic means (6)movable relative to ferromagnetic test material (2) for exciting ultrasound in it, magnetizing superficial layer of the material, electric winding (8) fed by alternating current source. Magnetic means (6) and electric winding (8) are in turn applied to the test material (2). Electric winding (8) is placed near the material after being magnetized by magnetic means (6). Variable magnetic flow produced by electric winding (8), interacts with residual material magnetization, producing ultrasonic oscillations of the material.
EFFECT: enhanced effectiveness of quality control.
9 cl, 1 dwg
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