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1. WO2020110667 - SURFACE DEFECT DETECTING METHOD, SURFACE DEFECT DETECTING DEVICE, METHOD FOR MANUFACTURING STEEL MATERIAL, STEEL MATERIAL QUALITY CONTROL METHOD, STEEL MATERIAL MANUFACTURING EQUIPMENT, METHOD FOR CREATING SURFACE DEFECT DETERMINATION MODEL, AND SURFACE DEFECT DETERMINATION MODEL

Publication Number WO/2020/110667
Publication Date 04.06.2020
International Application No. PCT/JP2019/043930
International Filing Date 08.11.2019
IPC
G01N 21/88 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws, defects or contamination
G01N 21/892 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws, defects or contamination
89in moving material, e.g. paper, textiles
892characterised by the flaw, defect or object feature examined
CPC
G01N 21/88
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws or contamination
G01N 21/892
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws or contamination
89in moving material, e.g. running paper or textiles
892characterised by the flaw, defect or object feature examined
Applicants
  • JFEスチール株式会社 JFE STEEL CORPORATION [JP]/[JP]
Inventors
  • 大野 紘明 ONO, Hiroaki
  • 楯 真沙美 TATE, Masami
Agents
  • 特許業務法人酒井国際特許事務所 SAKAI INTERNATIONAL PATENT OFFICE
Priority Data
2018-22440330.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SURFACE DEFECT DETECTING METHOD, SURFACE DEFECT DETECTING DEVICE, METHOD FOR MANUFACTURING STEEL MATERIAL, STEEL MATERIAL QUALITY CONTROL METHOD, STEEL MATERIAL MANUFACTURING EQUIPMENT, METHOD FOR CREATING SURFACE DEFECT DETERMINATION MODEL, AND SURFACE DEFECT DETERMINATION MODEL
(FR) PROCÉDÉ ET DISPOSITIF DE DÉTECTION DE DÉFAUTS DE SURFACE, PROCÉDÉ ET ÉQUIPEMENT DE FABRICATION DE MATÉRIAU EN ACIER, PROCÉDÉ DE CONTRÔLE DE QUALITÉ DE MATÉRIAU EN ACIER, PROCÉDÉ DE CRÉATION DE MODÈLE DE DÉTERMINATION DE DÉFAUTS DE SURFACE ET MODÈLE DE DÉTERMINATION DE DÉFAUTS DE SURFACE
(JA) 表面欠陥検出方法、表面欠陥検出装置、鋼材の製造方法、鋼材の品質管理方法、鋼材の製造設備、表面欠陥判定モデルの生成方法、及び表面欠陥判定モデル
Abstract
(EN)
A surface defect detecting method according to the present invention is a surface defect detecting method for optically detecting surface defects in a steel material, and includes: a radiating step of radiating illuminating light from different directions onto the same inspection target position using at least two distinguishable light sources; and a detection step of detecting a surface defect at the inspection target position on the basis of a degree of overlap of bright portions extracted from at least two images obtained using reflected light originating from the illuminating light.
(FR)
L'invention concerne un procédé de détection de défauts de surface destiné à détecter optiquement des défauts de surface sur un matériau en acier, et comprenant : une étape de rayonnement consistant à faire rayonner une lumière d'éclairage à partir de directions différentes sur le même emplacement cible d'inspection, au moyen d'au moins deux sources de lumière distinctes ; et une étape de détection consistant à détecter un défaut de surface au niveau de l'emplacement cible d'inspection, en fonction du degré de chevauchement de parties claires extraites d'au moins deux images obtenues au moyen de la lumière réfléchie provenant de la lumière d'éclairage.
(JA)
本発明に係る表面欠陥検出方法は、鋼材の表面欠陥を光学的に検出する表面欠陥検出方法であって、2つ以上の弁別可能な光源を利用して同一の検査対象部位に異なる方向から照明光を照射する照射ステップと、各照明光の反射光による2つ以上の画像から抽出された明部の重なり度合に基づいて前記検査対象部位における表面欠陥を検出する検出ステップと、を含む。
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