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

    公开(公告)号:JPH10142179A

    公开(公告)日:1998-05-29

    申请号:JP29802597

    申请日:1997-10-30

    Abstract: 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.

    ENSAYOS NO DESTRUCTIVOS: TERMOGRAFIA DE PROFUNDIDAD TRANSITORIA.

    公开(公告)号:ES2262168T3

    公开(公告)日:2006-11-16

    申请号:ES97118977

    申请日:1997-10-30

    Abstract: Procedimiento para detectar un defecto (1 a 14) en un objeto que presenta una superficie, estando dividida dicha superficie en una serie de elementos de resolución, que comprende las etapas siguientes: a. calentar la superficie del objeto; b. grabar una pluralidad de imágenes térmicas de los elementos de resolución sobre dicha superficie calentada a lo largo de un periodo de tiempo, en el que cada uno de dichos elementos de resolución corresponden a un píxel; c. determinar la intensidad de píxeles individual para cada una de dichas imágenes térmicas; d. determinar la intensidad media de píxeles para cada imagen térmica; e. obtener el contraste de píxeles para cada uno de dichos píxeles en cada una de dichas imágenes térmicas restando dicha intensidad media de píxeles de dicha intensidad de píxeles individual; y f. determinar la profundidad de un defecto en el objeto basándose en dicho contraste de píxeles.

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