METHOD FOR ESTIMATING RELIABILITY AND SAFETY OF PRODUCT ON BASIS OF NON-DESTRUCTIVE CONTROL Russian patent published in 2005 - IPC

FIELD: non-destructive control.

SUBSTANCE: method includes determining critical size χ_cr of defects in operation mode and allowed size [χ]_d.o. of defects. Control results are presented in form of bar graph in coordinates (N_det,χ), where N_det - number of detected defects, χ - characteristic size of defect. Probability of defect detection P_pd is determined, as well as source defectiveness N_sc=frequency(χ), remaining defectiveness N_rm=φ(χ) as difference between N_sc and N_det. Remaining defectiveness is divided by trustworthy portion χ≤χ_d and probability portion χ>χ_d, where χ_d - size of defects at limit between trustworthy and probable portions. On basis of probable portion of remaining defectiveness probability of existence of defects is determined, sizes of which exceed χ_cr and defects, sizes of which exceed [χ]_d.o.. Safety of product is determined as probability of absence of defects, sizes of which exceed χ_cr, and reliability of product is determined as probability of absence of defects, size of which exceed [χ]_d.o..

EFFECT: higher efficiency.

9 cl, 5 dwg