Method for quickly measuring wall thickness of annular section based on industrial CT

Abstract

The invention relates to a method for quickly measuring wall thickness of an annular section based on an industrial CT, belongs to the technical field of nondestructive testing, and solves the problemthat the maximum value and the minimum value of the wall thickness of a rotary cavity component cannot be obtained in the wall thickness measurement process of the rotary cavity component in the prior art. The measuring method comprises the following steps: 1, acquiring the circular ring section of the rotary cavity component, and dividing an image area; 2, determining circle center coordinates of the circular ring section; 3, calculating the maximum radius Rmax of the circular ring section, and drawing a virtual circle; and 4, calculating the pixel distance of any point in the virtual circle, and calculating the actual wall thickness of any point. The circular ring section of the position to be measured is obtained through the industrial CT imaging equipment, the circle center coordinates of the circular ring section are obtained through the two chord lines, the maximum value and the minimum value of the wall thickness of the rotary cavity component are obtained on the premise that it is guaranteed that the measured component is not damaged, the principle is simple, the calculated amount is small, and the operation calculation speed is high.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for rapidly measuring the wall thickness of an annular section based on industrial CT. Background technique [0002] For some products with a revolving cavity structure (through hole or closed), conventional dimensional measurement methods such as calipers, laser scanning or contact three-coordinates cannot effectively measure their wall thickness, and non-destructive testing methods are required for wall thickness measurement. Common non-destructive measurement methods for wall thickness include ultrasonic method, X-ray method, infrared thermal imaging method and industrial CT method. For cavity components with uneven density or large attenuation, because there are many pores inside, the attenuation is large when the ultrasonic wave penetrates the wall thickness, and the reflected echo signal cannot be effectively collected to achieve wall thickness meas...

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a rapid measurement method for the wall thickness of the circular section based on industrial CT, to solve the problem that the wall thickness of the rotary cavity component cannot be obtained during the wall thickness measurement process of the existing rotary cavity component max and min problem

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