MODE OF EVALUATION OF DEFECT SIZES IN THE DIRECTION OF RADIOSCOPY Russian patent published in 2007 - IPC G01N23/18 

FIELD: the invention is designed for evaluation of defect sizes in the direction of radioscopy.

SUBSTANCE: the essence is in that they make radiography of standard and real defects, photometry of received images and comparison of the values of their contrasts ▵D carried to the contrast coefficient γ_D, build or choose out of earlier built dependences of the value ▵D/γ_D of standard grooves and standard openings from the width b (diameter Ø) of a standard defect corresponding to x-rayed thickness of the control article which they receive according to the data of photometry of radiographic pictures of the samples with standard grooves and openings of different width(diameter), but of the same depth, x-rayed at given parameters of radiographic control of the article, they x-ray the controlled article with placing on it some standard defect- a groove, an opening, a projection, a wire of known size ▵d^St.D and according to the received picture they photometrically measure the values ▵D/γ_D of the standard (St.D) and real (R.D.) defects. Then they define the correction coefficient (k_b) taking into consideration distinction in the width of the compared standard and real defects, correction coefficient (k_f) taking into consideration distinction in the form (ratio of the length l/b of the defect to its width) comparing the standard and the real defects, and also coefficient (k_p) characterizing hollowness of the defects or their packing with some insertions. After that they define the size of the defect in the direction of radioscopy with the usage of these coefficients.

EFFECT: reduces labor-intensiveness, increases reliability and accuracy of evaluation of the sizes of the defects in the direction of radioscopy.

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