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1. WO2020201217 - METHOD AND APPARATUS FOR DETERMINING DEFORMATIONS ON AN OBJECT

Publication Number WO/2020/201217
Publication Date 08.10.2020
International Application No. PCT/EP2020/058964
International Filing Date 30.03.2020
IPC
G01B 11/25 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
24for measuring contours or curvatures
25by projecting a pattern, e.g. moiré fringes, on the object
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
CPC
G01B 11/2522
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
24for measuring contours or curvatures
25by projecting a pattern, e.g. ; one or more lines,; moiré fringes on the object
2518Projection by scanning of the object
2522the position of the object changing and being recorded
G01N 2021/8854
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
8851Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
8854Grading and classifying of flaws
G01N 2021/8887
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
8851Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
8887based on image processing techniques
G01N 21/8806
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
8806Specially adapted optical and illumination features
G01N 21/8851
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
8851Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
Applicants
  • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE]/[DE]
  • ORZOL, Jens
  • LENHARTZ, Michael
Inventors
  • ORZOL, Jens
  • LENHARTZ, Michael
  • BAUMANN, Daniel
  • HECKER, Dirk
  • MÖLLER, Ronja
  • VONOLFEN, Wolfgang
  • BAUCKHAGE, Christian
Agents
  • PFENNING, MEINIG & PARTNER MBB
Priority Data
19166259.229.03.2019EP
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN UND VORRICHTUNG ZUR BESTIMMUNG VON VERFORMUNGEN AN EINEM OBJEKT
(EN) METHOD AND APPARATUS FOR DETERMINING DEFORMATIONS ON AN OBJECT
(FR) PROCÉDÉ ET DISPOSITIF POUR DÉTERMINER DES DÉFORMATIONS SUR UN OBJET
Abstract
(DE)
Die Erfindung betrifft ein Verfahren zur Bestimmung von Verformungen an einem Objekt, wobei das Objekt beleuchtet wird und während der Beleuch- tung bewegt wird. Dabei wird das Objekt mittels zumindest einer Kamera be- obachtet und durch die Kamera zumindest zwei Kamerabilder zu unterschied- lichen Zeitpunkten erzeugt. In den Kamerabildern werden für durch Form- merkmale bewirkte Reflexionen am Objekt jeweils Polygonzüge ermittelt. An- hand des Verhaltens der Polygonzüge über die zumindest zwei Kamerabilder hinweg werden die Formmerkmale klassifiziert und es wird eine zweidimen- sionale Repräsentierung erzeugt, welche eine räumliche Verteilung von Ver- formungen abbildet. Die Erfindung betrifft außerdem eine entsprechende Vorrichtung.
(EN)
The invention relates to a method for determining deformations on an object, wherein the object is illuminated and moved while being illuminated. In the process, the object is observed by means of at least one camera and at least two camera images are generated at different times by said camera. In the camera images, polygonal chains are ascertained in each case for reflections at the object caused by form features. The form features are classified on the basis of the behavior of the polygonal chains over the at least two camera images and a two-dimensional representation is generated, the latter representing a spatial distribution of deformations. Moreover, the invention relates to a corresponding apparatus.
(FR)
L'invention concerne un procédé pour déterminer des déformations sur un objet, l'objet étant éclairé et déplacé pendant l'éclairage. L'objet est ici observé au moyen d'au moins une caméra et la caméra génère au moins deux images de caméra à des moments différents. Des tracés polygonaux pour les réflexions sur l'objet causées par les caractéristiques de forme sont respectivement déterminés dans les images de caméra. Les caractéristiques de forme sont classifiées à l'aide du comportement des tracés polygonaux sur les au moins deux images de caméra, et une représentation bidimensionnelle est générée, laquelle représente une distribution spatiale des déformations. L'invention concerne en outre un dispositif correspondant.
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