METHOD FOR DETECTING FLAW INSIDE OBJECT, APPARATUS FOR LOCATING THE FLAW, AND DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide a method in which a flaw inside an object can be located precisely, in which the size of the flaw can be measured precisely, which can be automated and which is objective when the method is used for a complicated shape, a complicated size and an uneven surface to be heated. ;SOLUTION: A system which partitions a flaw inside an object is composed of a heater which heats the surface of the object, of a recorder which records the intensity of a pixel on the heated surface, of a means which decides the contrast of the pixel on the basis of the intensity of the pixel and of a means which decides the size and the position of the flaw inside the object on the basis of the contrast of the pixel. Then, the contrast of every pixel is monitored regarding a continuous thermal image, and the position of the flaw inside the object is decided by using the contrast of the pixel. The surface of the object and the flaw which is situated under it are drawn on an image print at a color spectrum which is related to the depth of the flaw having a specific color.;COPYRIGHT: (C)1998,JPO