VIBROACOUSTIC METHOD OF ASSESSING TECHNICAL CONDITION OF CONDUCTING ENGINEERING UTILITIES Russian patent published in 2020 - IPC G01N29/00 

FIELD: nondestructive inspection methods.

SUBSTANCE: invention relates to non-destructive testing methods, namely to vibration diagnostics, and can be used for analysis of technical state of conducting engineering utilities. During the method implementation, generating sound oscillations with resonance frequency by means of a dynamic radiator and recording the dynamic radiator signal by means of a sensitive element. Lamb waves are generated with a resonant frequency in range of 250 to 15,000 Hz, wherein the oscillations are recorded at identical intervals along the entire length of the diagnosed object, then, based on the measurement results recorded by the sensitive element, a plot of the amplitude distribution of the Lamb wave oscillation is plotted along the measurement line. Then, obtained results are analyzed, at points, where graph of pipeline oscillations amplitude extends beyond confidence interval, defect zone is located, and determining defect size is based on the degree of output of the pipeline oscillation amplitude curve beyond the confidence interval.

EFFECT: technical result consists in the possibility of localization and defect size determination not only in pipelines, but also in any hollow engineering communications (pneumatic and hydraulic lines).

1 cl, 4 dwg