METHOD OF DETERMINING COORDINATES OF SOURCES OF ACOUSTIC EMISSION SIGNALS AND DEVICE THEREFOR Russian patent published in 2019 - IPC G01N29/14 

FIELD: defectoscopy.

SUBSTANCE: invention relates to nondestructive inspection of metal structures using an acoustic emission method. Method includes installation of n acoustic transducers forming piezo antenna, calibration of structure, recording acoustic emission signals with each measuring channel, determining the speed of propagation of signals and the difference in their arrival times to the acoustic transducers and calculating the coordinates of the defects therefrom. When calibrating the structure, determining the two-interval coefficient threshold value, recording the signal at the moment of exceeding the threshold level by a two-interval coefficient in one of the piezo antenna channels, its maximum value is determined, and time of signals arrival to group of channels forming piezo antenna is performed under condition: Δt≤2R/C, where Δt is the acoustic emission signal propagation time difference, mcs; 2R is control area diameter, m; C is sound velocity, m/s, after which defect coordinates are calculated. Device for determining coordinates of sources of acoustic emission signals further comprises a unit for calculating two-interval coefficient, a data bus, OR logic.

EFFECT: technical result consists in improvement of reliability and accuracy of localization of defects in acoustic emission monitoring.

3 cl, 4 dwg