METHOD OF DETERMINING ARTICLE THICKNESS AT ONE-SIDED ACCESS Russian patent published in 2019 - IPC G01B17/02 

FIELD: defectoscopy.

SUBSTANCE: use: for ultrasonic thickness gauging, flaw detection of materials and articles. Summary of invention consists in the fact that on the ultrasonic echo-pulse thickness meter the speed of propagation of ultrasonic oscillations corresponding to the material of the measured article is set, ultrasonic transducer is placed on the outer surface of the measured article material, then the article wall thickness value is read from and recorded from the ultrasonic device, fixing position in space of initial surface of article material, then for each measured point of article material surface, on which ultrasonic transducer is installed, fixing and measuring article wall conditional thickness (d_1c) on conditional speed of ultrasonic oscillations propagation in article material (C_c), then wall surface of article is reduced, reducing its geometrical thickness by a value close to half the wavelength of ultrasonic oscillations at frequency of converter, in each measured point of article material surface change of geometrical thickness of article wall is measured and this value is fixed (Δd), then in each measured point of article material surface an ultrasonic transducer is installed, conditional thickness of article wall is measured and fixed (d_2c) on conditional speed of ultrasonic oscillations propagation in article material (C_c), calculating the article wall geometrical thickness and the true ultrasonic vibration propagation speed for each article material surface point.

EFFECT: high accuracy and reliability of measurement results of thickness of articles with one-sided access, made from non-uniform material with unknown distribution of speed of ultrasonic oscillations on surface of article.

1 cl, 6 tbl, 3 dwg