METHOD OF TESTING ARTICLE

摘要

FIELD: nondestructive testing. ^ SUBSTANCE: method comprises connecting the winding of vortex current converter to the oscillation circuit excited by current pulses of varying frequency. The rate and the direction of the frequency scan change in two strokes of the conversion. The output signal from the converter is compared with the threshold level. The amplified voltage of the unbalance is used for control of the amplitude of the pulses of exciting current. ^ EFFECT: expanded functional capabilities. ^ 1 dwg