METHOD FOR ACOUSTIC NON-DESTRUCTIVE TESTING OF EXTENDED STRUCTURES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC G01N29/14 G01N29/04 

FIELD: non-destructive testing.

SUBSTANCE: invention can be used for acoustic non-destructive testing of extended structures made of ferromagnetic and non-ferromagnetic materials. Essence of the invention consists in the fact that magnetostrictive converters are mounted on an extended structure of the controlled object to convert an electrical signal into elastic oscillations and vice versa, connected to the control unit of these converters, recording and processing of echo signals reflected from defects on the controlled object, using a magnetostrictive transducer, generating time-varying electrical pulses which cause shear waves SH in the material of the inspected object, creating in the material of the object and in local points of anomalies, containing sources of acoustic emission, mechanical stresses, and when reaching neighboring converters, shear waves and echo pulses are converted into electrical signals, filtering signals from generated shear waves and natural noise, cross-correlation, determining the arrival times of the signals to determine the location of the defect, and based on the frequency characteristic of the echo signal by comparing with the typical frequency characteristics for each of the defects, presence of a defect is determined, the size of the defect is determined from the ratio of the amplitudes of the generated shear waves and the echo pulse.

EFFECT: providing the possibility of reliable remote monitoring of the state of extended structures.

9 cl, 22 dwg