FIELD: instrumentation.
SUBSTANCE: dynamic calibration of USD is performed, USD comprises the row unit of electro-acoustic converters, first of which is ultrasonic radiation generator, and the subsequent converter or converters are ultrasonic radiation receivers, and the threshold level of the detector actuation is pre-set on the basis of the current value of amplitude of the reference signal radiated inversely with reference to the main probing signal and representing by itself a residual ultrasonic generator radiation at the current step or compulsory ultrasonic generator radiation at the additional step.
EFFECT: improvement of accuracy of setting of threshold level of ultrasonic detector actuation during examination.
3 cl, 17 dwg
