公开(公告)号：KR20180009792A

公开(公告)日：2018-01-29

申请号：KR20177036964

申请日：2016-06-22

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  TATE MASAMI ,  OSHIGE TAKAHIKO ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/88 ,  G01N21/89 ,  G01N21/892 ,  G01N21/956

CPC classification number: G01N21/892

Abstract: 본발명에따른표면결함검출장치는, 강재의표면결함을광학적으로검출하는표면결함검출장치로서, 2개이상의변별가능한광원을이용하여동일한검사대상부위에상이한방향으로부터조명광을조사하는조사수단과, 각조명광의반사광에의한화상을취득하고, 취득한화상간에서차분처리를행함으로써검사대상부위에있어서의표면결함을검출하는검출수단을구비하고, 광학계가소정의조건을만족하고있는것을특징으로한다. 이에따라, 스케일이나무해모양과표면결함을정밀도좋게변별할수 있다.

Abstract translation: 根据本发明的表面缺陷检测装置光学地检测钢材中的表面缺陷，所述表面缺陷检测装置的特征在于具有照射装置，该照射装置使用至少两个可微分光源将照明光照射到相同的检测目标部位 以及检测装置，其通过获取由每个照明光的反射光产生的图像并且在所获取的图像之间执行差分处理来检测检测目标部位处的表面缺陷，并且进一步的特征在于光学系统满足 预定条件。 结果，可以准确地将表面缺陷与标尺/未受损伤的图案区分开来。

公开(公告)号：KR20180009791A

公开(公告)日：2018-01-29

申请号：KR20177036862

申请日：2016-06-22

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  TATE MASAMI ,  OSHIGE TAKAHIKO ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/88 ,  G01N21/89 ,  G01N21/892 ,  G01N21/956

CPC classification number: G01N21/892

Abstract: 본발명에따른표면결함검출방법은, 강재의표면결함을광학적으로검출하는표면결함검출방법으로서, 2개이상의변별가능한광원을이용하여동일한검사대상부위에상이한방향으로부터조명광을조사하는조사스텝과, 각조명광의반사광에의한화상을취득하고, 취득한화상간에서차분처리를행함으로써검사대상부위에있어서의표면결함을검출하는검출스텝을포함하고, 검사대상부위에대한각 광원의조명광의입사각이 60°이상 82.5°이하의범위내에있는것을특징으로한다.

Abstract translation: 根据本发明的表面缺陷检测方法是用于光学检测钢材中的表面缺陷的方法，所述表面缺陷检测方法的特征在于具有照射步骤，其中使用至少两个可微分光源来照射照明 从相互不同的方向对同一检测对象部位照射光;以及检测步骤，取得由各照明光的反射光生成的图像，并对所取得的图像进行差分处理，由此检测检测对象部位的表面缺陷， 其特征在于，来自各光源的照明光相对于检测对象部位的入射角度在60°〜82.5°的范围内。

公开(公告)号：CA3013438A1

公开(公告)日：2015-07-02

申请号：CA3013438

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/95 ,  G01N21/89

Abstract: A surface defect detecting method is a surface defect detecting method of optically detecting a surface defect of a steel pipe P, and includes an irradiation step of irradiating the same examination target part with illumination light beams L from different directions by using two distinguishable light sources 2a and 2b, and a detection step of obtaining images by reflected light beams of the respective illumination light beams L and detecting a surface defect in the examination target part by executing subtraction processing between the obtained images. Thereby, the surface defect is able to be accurately distinguished from scale or a harmless pattern.

公开(公告)号：CA3013438C

公开(公告)日：2020-07-14

申请号：CA3013438

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/95 ,  G01N21/89

Abstract: A surface defect detecting method is a surface defect detecting method of optically detecting a surface defect of a steel pipe P, and includes an irradiation step of irradiating the same examination target part with illumination light beams L from different directions by using two distinguishable light sources 2a and 2b, and a detection step of obtaining images by reflected light beams of the respective illumination light beams L and detecting a surface defect in the examination target part by executing subtraction processing between the obtained images. Thereby, the surface defect is able to be accurately distinguished from scale or a harmless pattern.

公开(公告)号：CA2934796C

公开(公告)日：2022-03-22

申请号：CA2934796

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892

Abstract: This surface defect detection method is for optically detecting a surface defect of a steel pipe (P), and includes an irradiation step for irradiating illumination light beams (L) from different directions onto the same region under inspection on a steel pipe (P) using two distinguishable light sources (2a, 2b) and a detection step for acquiring images of the reflected light of the light beams (L) and detecting a surface defect on the region under inspection by carrying out subtraction processing using the acquired images. As a result, it is possible to accurately distinguish scales and benign patterns from surface defects.

公开(公告)号：CA2934796A1

公开(公告)日：2015-07-02

申请号：CA2934796

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892

Abstract: This surface defect detection method is for optically detecting a surface defect of a steel pipe (P), and includes an irradiation step for irradiating illumination light beams (L) from different directions onto the same region under inspection on a steel pipe (P) using two distinguishable light sources (2a, 2b) and a detection step for acquiring images of the reflected light of the light beams (L) and detecting a surface defect on the region under inspection by carrying out subtraction processing using the acquired images. As a result, it is possible to accurately distinguish scales and benign patterns from surface defects.

公开(公告)号：EP3118612A4

公开(公告)日：2017-09-20

申请号：EP15761351

申请日：2015-03-03

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  ONO HIROAKI ,  KODAMA TOSHIFUMI ,  OGAWA AKIHIRO

IPC: G01N25/72 ,  G01J5/48

CPC classification number: G01N21/8806 ,  G01J5/48 ,  G01N21/359 ,  G01N21/93 ,  G01N21/95 ,  G01N25/72

Abstract: A control device 12 acquires a self-luminous image of a steel pipe captured when the steel pipe is hot, corrects the self-luminous image by uniformizing luminance variation in the circumferential direction of the self-luminous image, and detects a surface defect based on the corrected self-luminous image. The self-luminous image is preferably captured in a position behind a reducer. The diameter reduction rate applied by the reducer for the steel pipe is preferably equal to or greater than 110%. The luminance variation in the circumferential direction of the self-luminous image is uniformized by using a luminance distribution in the circumferential direction where the luminance in the longitudinal direction of the steel pipe is averaged. The luminance variation in the circumferential direction of the self-luminous image may be uniformized by using a difference in the luminance between a plurality of self-luminous images captured with the position in the longitudinal direction of the steel pipe changed.

Abstract translation: 控制装置12取得钢管热时拍摄的钢管的自发光图像，通过使自发光图像的周向的亮度变化均匀化来修正自发光图像，基于 校正后的自发光图像。 自发光图像优选被捕获在减速器后面的位置。 减径机对钢管施加的缩径率优选为110％以上。 通过使用钢管长度方向的亮度平均后的圆周方向的亮度分布，使自发光图像的周向亮度变化均匀化。 通过使用在钢管的长度方向上的位置改变的情况下拍摄的多个自发光图像之间的亮度差异，可以使自发光图像在圆周方向上的亮度变化均匀。

公开(公告)号：EP3088874A4

公开(公告)日：2017-05-17

申请号：EP14873854

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892 ,  G01B11/30 ,  G01N21/88 ,  G01N21/952

CPC classification number: G01N21/8851 ,  G01B11/245 ,  G01N21/892 ,  G01N21/952 ,  G01N2021/8822 ,  G01N2021/8887 ,  G01N2201/063 ,  G06K9/4604 ,  G06K9/6267 ,  G06T7/0004 ,  G06T7/70 ,  G06T2207/20224 ,  G06T2207/30164 ,  H04N7/01

Abstract: A surface defect detecting method is a surface defect detecting method of optically detecting a surface defect of a steel pipe P, and includes an irradiation step of irradiating the same examination target part with illumination light beams L from different directions by using two distinguishable light sources 2a and 2b, and a detection step of obtaining images by reflected light beams of the respective illumination light beams L and detecting a surface defect in the examination target part by executing subtraction processing between the obtained images. Thereby, the surface defect is able to be accurately distinguished from scale or a harmless pattern.

Abstract translation: 表面缺陷检测方法是光学检测钢管P的表面缺陷的表面缺陷检测方法，并且包括照射步骤，该照射步骤通过使用两个可区分的光源2a从不同方向照射照明光束L给相同的检查目标部分 以及检测步骤，通过各个照明光束L的反射光束获得图像，并且通过在所获得的图像之间执行减法处理来检测检查目标部分中的表面缺陷。 由此，表面缺陷能够被精确地与刻度或无害模式区分开来。

公开(公告)号：EP3315952A4

公开(公告)日：2018-06-13

申请号：EP16814396

申请日：2016-06-22

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  TATE MASAMI ,  OSHIGE TAKAHIKO ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892 ,  G01N21/88 ,  G01N21/89 ,  G01N21/952

CPC classification number: G01N21/892 ,  G01N21/8806 ,  G01N21/952 ,  G01N2021/8816 ,  G01N2021/8918 ,  G01N2021/8924

Abstract: 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.

公开(公告)号：JP2014112064A

公开(公告)日：2014-06-19

申请号：JP2012272880

申请日：2012-12-13

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： KODAMA TOSHIBUMI ,  OZAKI SEIJI ,  OGAWA AKIHIRO ,  KOSHIHARA TAKAHIRO

IPC: G01B21/30

Abstract: PROBLEM TO BE SOLVED: To accurately detect a surface flaw without being affected by displacement such as backlash of an inspecting object even if the displacement occurs in a range exceeding the uneven shape of the flaw due to the conveyance of the inspecting object.SOLUTION: When a surface flaw of a long-sized inspecting object 12 is inspected over the whole length of the inspecting object 12, a plurality of distance measuring means (21 and 22) are closely disposed in the relative moving direction. The distance measuring means (21 and 22) measure the distance to the surface of the inspecting object 12 while relatively moving in the longitudinal direction of the inspecting object 12 maintaining a certain distance from the central axis of the inspecting object 12. The existence of the surface flaw 12A of the inspecting object 12 is detected on the basis of a distance profile of the longitudinal direction of the inspecting object 12 that is measured by the plurality of distance measuring means (21 and 22).

Abstract translation: 要解决的问题：即使在由于检查对象的传送导致的缺陷发生在超过缺陷的不均匀形状的范围内的情况下，也能够精确地检测表面缺陷而不受检查对象的间隙等位移的影响。解决方案：当 在检查对象12的整个长度上检查长尺寸检查对象12的表面缺陷，多个距离测量装置（21和22）沿相对移动方向紧密地布置。 距离测量装置（21,22）在检查对象12的长度方向相对移动时，与检查对象12的中心轴保持一定距离，测量与检查对象物12的表面的距离。 基于由多个距离测量装置（21和22）测量的检查对象12的纵向的距离轮廓来检测检查对象12的表面缺陷12A。