FIELD: physics.
SUBSTANCE: analysis of pipeline by proposed method uses piezoelectric converters to record signals reflected from inner or outer wall of the pipeline that exceed program-defined threshold. Reflected signals are selected by maximum amplitude referenced to time of arrival from radiated pulse. Then, at least four signals are selected by maximum amplitudes and recorded as magnitudes of time of radiated pulse and amplitude. Defined are boundaries of the beginning of wall depth variation from so-called "defect boundary uncertainty zone". Depending on signal structure in said zone correction magnitude is calculated to correct the signals of indent and pipe wall depth.
EFFECT: determination of said boundaries with arbitrary location of planes to perpendicular of acoustic axis of piezoelectric converter.
5 cl, 7 dwg
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