Method and apparatus for non-destructive testing

Details Method and apparatus for non-destructive testing Method and apparatus for non-destructive testing

2005-12-13

2005-12-13

Kim, Ahshik (Department: 2876)

Optics: measuring and testing

Inspection of flaws or impurities

C356S237200, C356S237400, C356S239800, C356S243400

Reexamination Certificate

active

06975391

ABSTRACT:
Using an image signal acquired by picking up a sample to be inspected by a color video camera, penetrant inspection and magnetic-particle inspection, which are non-destructive inspections, are carried out so that deficiency candidates, including a pseudo deficiency, are automatically detected and displayed on a screen. A real deficiency can be detected from the displayed deficiency candidates. As image data is stored in memory means, information of a deficiency can be repeatedly reproduced on the screen. In the penetrant inspection, the chromaticity at each position on an image is acquired, a deficiency candidate is extracted based on the chrominance, and the deficiency is distinguished from a pseudo deficiency based on the differential value of the chrominance. A polarization filter eliminates regular reflection originating from illumination in the penetrant inspection, and an ultraviolet-rays cutting filter prevents noise in the magnetic-particle inspection. Both inspections can be carried out with a single probe.

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