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    • 1. 发明专利
    • SURFACE DEFECT INSPECTING DEVICE FOR STEEL PLATE
    • JP2000028547A
    • 2000-01-28
    • JP19415998
    • 1998-07-09
    • NIPPON KOKAN KK
    • TANAKA HAJIMEMIKI KATSUAKITOMONAGA SHINICHIFUKUDA SHIGEMI
    • G01N21/89G01N21/88G01N21/892G01N21/93
    • PROBLEM TO BE SOLVED: To unify a quality management and to reduce a quality dispersion between respective steps and a work load for an inspection by editing a surface defect image and a defect information in the respective steps and simultaneously indicating it in the respective steps. SOLUTION: In a front surface detector 12 and a back surface detector 13, the defect of front and back surfaces of a cold drawing steel plate is detected by a CCD camera. A detection signal is corrected by a shelling correcting device 31 and is binarized by a binary device 32. The value is compared and decided with a threshold by a defect candidate detector 14, and a defect candidate point is detected. Then, a defect image is stored in a defect image primary memorizing device 15, and a defect name and a defect grade are separated by a defect separating device 16. After separation, only a defect image designated and separated is memorized in a secondary storage device 17. Then, information such as a defect name and a defect position are also given to the defect image secondary memorizing device 17 as an information and is fed to a detection control portion 18. The detection control portion 18 indicates the defect image and the defect information on a defect information correcting device 22 and CRT, 23, 24 for indicating a surface defect image and stores those information.