FIELD: measurement.
SUBSTANCE: invention relates to measurement equipment and can be used for evaluation of reliability of complex spatial structures from polymer composite materials. Method includes using reference defect placed on surface or inside controlled article, measuring a threshold signal value using a reference defect, measuring an information signal from a real defect on the inspected article, comparing the measured information signal with a threshold signal value and generating a conclusion on the presence or absence of defects in the monitored article based on the comparison results. Prior to placing the reference defect on the surface or inside the inspected article, an article of composite material with a real defect is selected to obtain a reference defect for the article of composite material. That is ensured by preparation of selected article in layer-by-layer parallel layers in area of real defect. On each layer of preparation thickness of real defect is measured with pitch Δa from the beginning of the detected defect fragment to its end at points j = 1, 2, 3…, jmax, where jmax is the number of measurement points of thickness of the defect on the ith layer of the preparation. Maximum and minimum values are selected from measured thickness values. Whole interval is divided into "P" intervals. Determining the defect length value corresponding to the thickness interval of the defect. Solving the equation for the function F(Sδ,) = δmin , the value of the minimum length of the defect corresponding to the minimum thickness of the defect in the inspected article is determined. Performing the standard defect with certain parameters δmin, Smin.
EFFECT: technical result is increase in reliability of detection of local defect areas in controlled composite material.
3 cl, 6 dwg
