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1. 发明公开

EP3605072A1 SURFACE DEFECT INSPECTION METHOD AND SURFACE DEFECT INSPECTION DEVICE 审中-公开
公开(公告)号：EP3605072A1
公开(公告)日：2020-02-05
申请号：EP18770965.4
申请日：2018-02-28
申请人： JFE Steel Corporation
发明人： KOSHIHARA, Takahiro , UMEGAKI, Yoshiyuki , OSHIGE, Takahiko
IPC分类号： G01N21/88 , G01N21/892
摘要： In a surface defect inspection apparatus 1 according to one embodiment of the present invention, a texture feature image generating unit 43 generates a plurality of texture feature images by applying a filtering process using a plurality of spatial filters to an input image; a texture feature extracting unit 44 generates a feature vector at each position of the image, by extracting a value at a corresponding position from each of the texture feature images, for each of the positions of the input image; an abnormality level calculating unit 45 generates an abnormality level image representing an abnormality level for each position of the input image, by calculating an abnormality level, for each of the feature vectors, in a multi-dimensional distribution formed by the feature vectors; and a defect candidate detecting unit 46 detects a part having the abnormality level that is higher than a predetermined level in the abnormality level image as a defect portion or a defect candidate portion.

2. 发明公开

EP3315950A1 SURFACE FLAW DETECTION DEVICE, SURFACE FLAW DETECTION METHOD, AND MANUFACTURING METHOD FOR STEEL MATERIAL 审中-公开
标题翻译：表面缺陷检测装置，表面缺陷检测方法以及钢材的制造方法
公开(公告)号：EP3315950A1
公开(公告)日：2018-05-02
申请号：EP16814376.6
申请日：2016-06-22
申请人： JFE Steel Corporation
发明人： ONO, Hiroaki , TATE, Masami , OSHIGE, Takahiko , KODAMA, Toshifumi , KOSHIHARA, Takahiro , OGAWA, Akihiro , IIZUKA, Yukinori
IPC分类号： G01N21/892
CPC分类号： G01N21/892 , G01N21/952 , G01N2021/8816 , G01N2021/8918 , G01N2021/8924
摘要： A surface defect detection device according to the present invention is a surface defect detection device that optically detects a surface defect of a steel product, and is characterized by including an irradiation unit configured to irradiate the same inspection target portion with illumination light beams from different directions using two or more distinguishable light sources and a detection unit configured to acquire images formed by reflected light beams of the respective illumination light beams, and to detect the surface defect in the inspection target portion by performing difference processing between the acquired images, and is characterized in that an optical system satisfies a predetermined condition. Due to this, scale or harmless patterns can be accurately distinguished from the surface defect.
摘要翻译：根据本发明的表面缺陷检测装置是光学地检测钢制品的表面缺陷的表面缺陷检测装置，并且其特征在于包括照射单元，该照射单元被构造为从相同的检查目标部分照射来自不同方向的照明光束使用两个或更多个可区别的光源以及被配置为获取由各个照明光束的反射光束形成的图像的检测单元，并且通过执行所获取的图像之间的差异处理来检测检查目标部分中的表面缺陷，并且被表征因为光学系统满足预定的条件。由此，可以将表面缺陷准确地分辨出刻度或无害图案。

3. 发明公开

EP3315952A1 SURFACE FLAW DETECTION METHOD, SURFACE FLAW DETECTION DEVICE, AND MANUFACTURING METHOD FOR STEEL MATERIAL 审中-公开
标题翻译：表面缺陷检测方法，表面缺陷检测装置和钢材的制造方法
公开(公告)号：EP3315952A1
公开(公告)日：2018-05-02
申请号：EP16814396.4
申请日：2016-06-22
申请人： JFE Steel Corporation
发明人： ONO, Hiroaki , TATE, Masami , OSHIGE, Takahiko , KODAMA, Toshifumi , KOSHIHARA, Takahiro , OGAWA, Akihiro , IIZUKA, Yukinori
IPC分类号： G01N21/892
CPC分类号： G01N21/892 , G01N21/8806 , G01N21/952 , G01N2021/8816 , G01N2021/8918 , G01N2021/8924
摘要： A surface defect detection method according to the present invention is a method of optically detecting a surface defect of a steel product, and includes an irradiating step of irradiating illumination lights from different directions to an identical inspection target portion by using at least two distinguishable light sources; and a detecting step of acquiring images by reflection lights of the respective illumination lights and detecting a surface defect in the inspection target portion by performing difference processing between the acquired images. An incident angle of the illumination lights of the respective light sources are within a range of 60° to 82.5° relative to the inspection target portion.
摘要翻译：根据本发明的表面缺陷检测方法是光学检测钢制品的表面缺陷的方法，并且包括照射步骤，该照射步骤通过使用至少两个可区分的光源将来自不同方向的照明光照射到相同的检查目标部分 ; 以及检测步骤，通过各个照明光的反射光获取图像，并且通过执行所获取的图像之间的差异处理来检测检查目标部分中的表面缺陷。各个光源的照明光的入射角相对于检查目标部分在60°至82.5°的范围内。

4. 发明公开

EP3315951A1 SURFACE DEFECT DETECTION APPARATUS AND SURFACE DEFECT DETECTION METHOD 审中-公开
标题翻译：表面缺陷检测装置和表面缺陷检测方法
公开(公告)号：EP3315951A1
公开(公告)日：2018-05-02
申请号：EP16814392.3
申请日：2016-06-22
申请人： JFE Steel Corporation
发明人： TATE, Masami , ONO, Hiroaki , OSHIGE, Takahiko
IPC分类号： G01N21/892 , G01N21/952
CPC分类号： G01N21/952 , G01N21/8806 , G01N21/892 , G01N2021/8816 , G01N2021/8918 , G01N2021/8924
摘要： First illumination light and second illumination light that are distinguishable from each other are each applied to an inspection target part of a surface of a steel material with substantially the same incident angle from directions inclined opposite to each other. A first image of the inspection target part illuminated with first illumination light and a second image of the inspection target part illuminated with second illumination light are each captured. A difference image between the first image and second image is generated. A combination of a bright part and a dark part of a protruding part in the inspection target part is removed from among bright parts and dark parts of the difference image based on an arrangement of a bright part and a dark part in a predetermined direction corresponding to the irradiation direction of the first or second illumination light. The presence or absence of a recessed part in the inspection target part is determined based on a shape feature amount of the remainder of the bright parts and the dark parts after this removal processing or an arrangement of the remainder of the bright parts and the dark parts in the predetermined direction. The recessed part that has been determined to be present is detected as a surface defect of the steel material.
摘要翻译：彼此可区分的第一照明光和第二照明光各自以彼此相反倾斜的方向以基本相同的入射角施加到钢材表面的检查目标部分。用第一照明光照明的检查目标部分的第一图像和用第二照明光照射的检查目标部分的第二图像各自被捕获。生成第一图像和第二图像之间的差异图像。基于明亮部分和暗部分在与预定方向相对应的预定方向上的排列，从差异图像的亮部分和暗部分中去除检查目标部分中的凸出部分的亮部分和暗部分的组合第一或第二照明光的照射方向。基于在该去除处理之后亮部分和暗部分的其余部分的形状特征量或者亮部分和暗部分的其余部分的布置来确定检查目标部分中凹部的存在或不存在在预定的方向上。检测出判定为存在的凹部作为钢材的表面缺陷。

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