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WO1992000517A1 - Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine - Google Patents

Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine Download PDF

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Publication number
WO1992000517A1
WO1992000517A1 PCT/CA1991/000229 CA9100229W WO9200517A1 WO 1992000517 A1 WO1992000517 A1 WO 1992000517A1 CA 9100229 W CA9100229 W CA 9100229W WO 9200517 A1 WO9200517 A1 WO 9200517A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
angle
lamps
dark field
intensity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CA1991/000229
Other languages
English (en)
Inventor
Matthew Fairlie
David Smith
Warren Fraser
Otto Meijer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto Alcan International Ltd
Original Assignee
Alcan International Ltd Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcan International Ltd Canada filed Critical Alcan International Ltd Canada
Publication of WO1992000517A1 publication Critical patent/WO1992000517A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details
    • G01N21/8903—Optical details; Scanning details using a multiple detector array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8809—Adjustment for highlighting flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8851—Scan 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
    • G01N2021/8854—Grading and classifying of flaws
    • G01N2021/8867—Grading and classifying of flaws using sequentially two or more inspection runs, e.g. coarse and fine, or detecting then analysing
    • G01N2021/887—Grading and classifying of flaws using sequentially two or more inspection runs, e.g. coarse and fine, or detecting then analysing the measurements made in two or more directions, angles, positions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details
    • G01N2021/8908—Strip illuminator, e.g. light tube
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
    • G01N2021/8918—Metal

Definitions

  • This invention relates to method and apparatus for inspecting surface quality of a moving sheet of metal.
  • a system which interfaces with the operator is disclosed in United States patent 4,539,561.
  • the system is adapted to detect surface quality of cast aluminum strip.
  • At least one video camera is used in the detection process.
  • the system is adapted to restrict transmission from the camera to the TV monitor, so that only defective sections of the cast aluminum strip are shown on the TV camera. This considerably reduces the time that the operator must concentrate on the TV camera to detect surface imperfections and hence provides a more acute attention span for areas of the cast aluminum strip where surface imperfections are detected by the system.
  • the signal from the video camera is delimited with an upper and lower signal strength. Defective surface conditions cause the signal from the video camera to exceed or fall below these limits. At that point, recording and transmission of the image to the TV monitor is triggered.
  • United States patent 4,863,268 discloses a surface detection system which is particularly useful in detecting irregularities or flaws in the surface of automobile panels.
  • the source of light and camera are both oriented in the same direction.
  • a reflective surface is used to direct light reflected from the surface being inspected back to the camera. By re- reflecting the light over the surface being inspected, a shadow may be produced as observed by the camera which is indicative of the quality of the surface finish.
  • the system is compact, it provides, however, for only a single light source and a single camera which limits the types of surface imperfections which can be detected. As such the system is not particularly useful in detecting surface imperfections on high speed conveyed sheet material.
  • a similar system is disclosed in United States patent 4,629,319 involving a single TV camera and a single light source.
  • Both the light source and camera may be mounted on robotic arms.
  • the light source may be altered with a grill to provide a plurality of light lines all of the same intensity.
  • their angular position may be varied as the system traverses the surface being inspected to enhance the highlighting of the surface imperfections.
  • the system is particularly useful at low angles to detect surface imperfections, such as poorly oiled panels. However, this greatly expands the size of the system. Therefore it is desired to inspect the panel with an angle of incidence for the light beam of greater than 50° relative to the planar surface of the sheet or panel being inspected.
  • United States patent 4,675,830 discloses a video surface inspection system particularly adapted to sense imperfections in high speed aluminum sheet.
  • the system is capable of detecting surface imperfections in sheet moving at speeds up to 3600 feet per minute.
  • the system employs a plurality of lamps which direct light beams transversely of the motion of the sheet.
  • Two light sources positioned on opposite sides of the sheet provide diffuse lighting while two other lamps positioned above and to each side of the sheet provide specular lighting.
  • a plurality of video cameras are positioned above the sheet to detect highlighted surface irregularities in the moving sheet.
  • the system is devised to provide diffused and/or specular illumination which gives a more homogeneous coverage of the web surface where it is thought that a combination of diffuse and specular illumination can be used to highlight variations in the surface being examined. It is preferred that the lamps emit a longwave invisible (red) portion of the spectrum to match the image sensors of the video cameras and as well to improve the work environment.
  • an apparatus for inspecting surface quality of a moving sheet of metal.
  • the apparatus comprises: means for supporting the apparatus in a stationary position relative to a moving sheet of metal to be inspected; means for illuminating a surface of a moving sheet of metal to be inspected with at least two incident beams of light; means for inspecting the illuminated surface to detect intensity differences in light reflected by the illuminated surface from the at least two incident beams of light; the illuminating means is mounted on the support means for directing the at least two incident beams of light in a direction along the moving sheet of metal and the inspecting means being mounted on the support means to receive the reflected light; the illuminating means comprises at least two lamps each of which is adapted to emit a respective beam of light where each beam is elongate and narrow in cross- section and of a width at least as wide as a moving sheet of metal to be inspected; each of the at least two lamps is positioned on the support means to direct its corresponding beam of light onto an inspection region through which the
  • Each beam emitted from the respective lamp is at a different angle of incidence relative to the other beams of light.
  • This provides at least two corresponding incident beams from a near dark field and a far dark field; means for controlling beam intensity of each of the lamps to permit independent adjustment of beam intensity of each of the at least two lamps;
  • the inspecting means comprises means for sensing light reflected by a surface irregularity from at least one of the near dark field and the far dark field relative to the inspection region; the sensing means senses reflected light simultaneously from the at least two lamps while remaining at a single angle of reflection relative to normal for the inspection region; means for detecting sensed reflected light from the inspection region which is of an increased intensity greater than a predetermined maximum intensity or less than a predetermined minimum.
  • the detected reflected light of increased intensity, or decreased intensity is indicative of an irregularity in surface quality of the moving sheet of metal; and means for recording location on the moving sheet of metal of a detected irregularity in surface finish quality.
  • a method for inspecting surface finish quality of a moving sheet of metal.
  • the method comprises: moving the sheet of metal through an inspection region; illuminating a surface of the sheet of metal to be inspected with at least two incident beams of light from at least two corresponding lamps; orienting the lamps to direct the at least two beams of light having a plane of incidence along the direction of sheet motion; adapting each of the at least two lamps to emit a respective beam of light which is elongate and narrow in cross-section; positioning each of the at least two lamps to direct the at least two beams of light onto the inspection region at a different angle of incidence relative to each other to provide at least two corresponding incident beams from a near dark field and a far dark field; controlling beam intensity of each of the at least two lamps to permit independent adjustment of beam intensity of each of the at least two lamps; sensing simultaneously light reflected by a surface irregularity from incident light of the near dark field and the far dark field.
  • the sensing of light is conducted at a single angle of reflection which in turn determines the near dark field and the far dark field for the incident beams of light; detecting sensed reflected light from the inspection region which is of a increased intensity greater than a predetermined maximum intensity or of a decreased intensity less than a predetermined minimum intensity.
  • the predetermined maximum or minimum intensity is set so that reflected light of increased or decreased intensity indicates an irregularity in surface quality; and recording location on the moving sheet of metal of the detected irregularity in surface quality.
  • Figure 2 schematically shows the relative arrangement of the illumination and sensing devices of the apparatus according to this invention
  • Figure 3 is a plot showing variation in light scattering from rolled sheet depending upon angle of incidence and angle out of plane incidence for the sensing device
  • Figure 4 is a perspective view of the surface inspecting apparatus according to a preferred embodiment of this invention.
  • FIG. 5 is a block diagram showing components of the system controls. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the system is capable of detecting a variety of defects in the object surface. Furthermore, the surface being inspected may be 5 relatively rough as compared to the smooth surfaces of car panels. According to an aspect of this invention, the system is particularly useful in simultaneously detecting the following three types of defects:
  • Type A Defect - a defect which scatters light 10 diffusely or at angles far from the specular direction. For example, chatter cinch marks in the sheet reflect light this way.
  • Type B Defect - a defect which reflects light 15 strongly in a direction close to the specular direction. For example, roll marks in the sheet reflect light in this manner.
  • Type C Defect - a defect which absorbs light ?0 and reduces reflected light intensity at the detector. For example, holes in the sheet reduce reflected light intensity in this way.
  • types A and B defects are shown.
  • the sheet of material 10 has a
  • the apparatus is based on the light and sensing arrangement of Figure 2.
  • the sheet of material 24 is conveyed in the direction of arrow 26 beneath the stationary apparatus generally designated 28.
  • the lamps 30 and 32 project or emit respective beams of light 34 and 36 towards the sheet 24.
  • the lamps 30 and 32 are adapted to emit beams of light 34 and 36 which are of a width at least the width of the sheet 24 and of narrow elongate cross-section.
  • the beams are focused onto the same region, generally indicated 38, which for purposes of discussion with this apparatus is defined as the inspection region.
  • the sheet 26 is conveyed or passed or moved through the inspection region 38.
  • the light energy from lamps 30 and 32 is projected continuously onto the inspection region 38.
  • the sensing device 40 which in accordance with this embodiment is a line scan video camera, electronically senses the light intensity reflected from the inspection region 38.
  • the lamps are positioned in the near dark field and the far dark field. These positions are defined with reference to the metal surface such as rolled aluminum surfaces where light reflected within 5° of the specular direction, but not along the specular direction, is taken to mean light reflected from the near dark field.
  • the far dark field refers to scattered light directions greater than 5° from the specular direction.
  • the highest contrast is achieved by positioning the light source and detector in the near dark field position with the plane of incidence along the rolling direction.
  • the highest contrast is obtained with the detector and light source in a far dark field configuration.
  • both types of defects causing a respective style of light scattering can be detected simultaneously.
  • Both light sources are positioned so that the sheet passes through the plane of incidence of the light sources. This orientation is preferred over having the plane of incidence directed transversely of the rolling direction because the contrast of defects is more uniform across the field of view of the camera with the orientation of the light beams according to this invention and it fits the line scan camera concept.
  • Figure 3 shows the light scattering properties of a rolled sheet of aluminum where, as with Figure 2, the sheet is passed through the plane of incidence of the light beam.
  • the light intensity is highest for a zero angle in the plane of incidence and a zero angle out of the plane of incidence. Falling off from this highest intensity, the intensity reduces in a forward sloping direction as the angle and the plane of incidence increases and the angle out of the plane of incidence also increases.
  • the intensity of the light source 32 in the far dark field must be much higher than the intensity of the light emitted from the lamp 30 in the near dark field to give high contrast defects.
  • a suitable control function may be employed to adjust the intensity of lamp 30 relative to the intensity of lamp 32 to enhance the electronic detection of defects in the surface.
  • the preferred embodiment of Figure 4 is arranged to detect the surface characteristics of the upper surface 42 of the sheet 44 moving in the direction of 46.
  • the sheet 44 is passed beneath roller 48 and then upwardly over 50.
  • an illuminating system 52 is provided to illuminate the upper surface 42 of the moving sheet 44.
  • the illuminating system is arranged to direct the individual light beams onto the inspection region which extends across the width of the sheet 44 and is generally designated 54 by virtue of the lamps emitting beams of light which extend across the width of the sheet.
  • a narrow inspection region is defined on the curved portion of the sheet 44 as it passes over the roller 50.
  • a similar system could be constructed to inspect the bottom surface of sheet 44 as it passes under roller 48.
  • a mirror 56 is provided to fold the reflected light to the sensing device 58 which, in accordance with this embodiment, is a line scan video camera.
  • the components of this system are supported stationary relative to the inspection region 54.
  • the support components may be interconnected or supported by other surrounding structure of the rolling system so that the lamps, mirror and camera are all fixed relative to each other during any phase of the operation.
  • the device 52 for illuminating the inspection region 54 comprises, according to this embodiment, three lamps 60, 62 and 64.
  • Each of the lamps is supported from a suitable standard, such as at 66, which in turn is tied into a support structure 68. As noted, this support structure may be part of the strip rolling machine or other related tower equipment.
  • Each of the lamps 60, 62 and 64 is a high output, narrow aperture, fluorescent lamp. With reference to lamp 60, the narrow aperture is indicated at 70, with lamp 62 the aperture is indicated at 72 and with lamp 64 the aperture is indicated at 74.
  • Each lamp then emits an elongate narrow beam of a width at least as wide as the sheet 44.
  • the lamps are positioned on support 68 so as to direct the beam of light from each lamp towards the inspection region 54 and in a direction such that the sheet 44 travels through the angle of incidence of the lamps with the sheet.
  • the angle of incidence intersects the sheet upper surface 42 to define a linear inspection region 54 which extends across the sheet 44 and through which the sheet travels.
  • the narrow slit 70, 72 and 74 of each lamp is oriented to provide an angle of incidence which is either in the near or dark field for the lamp sources relative to the angular position of the camera 58.
  • the surface normal is indicated by line 76.
  • the camera 58 is at an angle ⁇ .
  • the beam from lamp 60 is at an angle of ⁇ plus approximately 2°, that is slightly greater than ⁇ so as to position it in the near dark field for the inspection region 54.
  • the two remaining lamps 62 and 64 are in the far dark field. According to this embodiment, they are positioned at a angle greater than 5° relative to the angle ⁇ . These angles are respectively ⁇ +/- ⁇ ⁇ and ⁇ +/- ⁇ 2 . For values of ⁇ - ⁇ j or ⁇ - ⁇ 2 , ⁇ is usually greater than ⁇ t or ⁇ 2 .
  • ⁇ is in the range of 10° to 45°.
  • lamp 60 is normally in the
  • Lamps 62 and 63 are greater than 5° from the specular direction.
  • the bright field would . defined by an incident angle of ⁇ which is determ____ed by the position of camera 58. It is understood, however, that camera 58 may be moved up and down as indicated by arrow 78. The purpose for moving the camera 58 is to heighten the sensitivity to various types of surface irregularities in the sheet 44. Hence the angle ⁇ with the lamps stationary can be altered. For example, the angle can be increased thereby positioning the lamps further into the far dark field, or conversely the angle ⁇ may be decreased thereby positioning the lamps closer to the near dark field.
  • the light output of the lamps may be regulated by photocells so that the intensity of the far dark field lamps can be adjusted to be much higher than the intensity of near dark field lamps.
  • the inspection region 54 of the sheet can be fixed by wrapping the sheet around the inspection roll 50.
  • the optical path from the roll to the camera may be folded at the mirror 56 to fit within the system constraints.
  • the mirrors 56 may be mounted from standards 80 which in turn are connected to a support structure which may be a continuum of support structure 68.
  • the camera 58 is mounted on a platform 82 which in turn is set on an adjustable device 84.
  • the adjustable device 84 may then raise and lower the platform 82 to adjust the relative position of the camera 58.
  • the intensity of the near dark field light scattering can be adjusted when the lamps are replaced.
  • an adjustment to lamp intensity by varying camera position can be achieved.
  • the camera position may be held to provide for continuous operation in detecting certain types of defects.
  • a further feature of this arrangement is that light conditions, as seen by the camera, can be changed while a coil is being inspected to tune the inspection process to certain types of defects.
  • a change in lighting conditions is readily incorporated into a programmed inspection procedure where the camera is positioned, as will be discussed in more detail with respect to Figure 5, such that it can be automatically cycled up and down so that the surface is inspected under alternating bright and dark fields.
  • a programmable controller 86 as shown in block in
  • the programmable controller is connected to a lamp intensity controller 88.
  • the lamp intensity controller powers the respective lamps 60, 62 and 64.
  • the intensity of each lamp can then be set by the lamp intensity controller 88 to achieve the desired enhancement of the surface irregularities passing through the inspection region 54.
  • the camera 58 senses light reflected from the inspection region and transmits electronic signals representative of the light received in accordance with the standard techniques as discussed with reference to prior art patents.
  • the signal is transferred to a segmenter 90 which establishes the predetermined minimum level of intensity.
  • Information which indicates intensity greater or less than a preset maximum or minimum limit for reflected light levels denotes a defect and is transmitted to the programmable controller.
  • the programmable controller then transmits to a TV monitor 92 the signal representing the surface defect in the sheet 44 in accordance with standard procedure.
  • the operator may then view the TV monitor to determine the nature of the defect. Because of the near dark field lighting, holes will appear as dark objects with sufficient contrast to be detected by the segmenter.
  • the defect can be detected by the signal level being less than a preset minimum.
  • the programmable controller can also be programmed to operate the camera locator 94 to raise and lower the camera in the direction of arrow 78 as shown in Figure 4. This, in turn, provides better information with respect to the surface imperfections being inspected.
  • the relative positions of the incident beams from the near and far dark fields are changed.
  • the lamp in the near dark field can be adjusted by the camera to be in the bright field when this happens.
  • the lamps in the far dark field are then moved towards the near dark field.
  • the machine can be programmed to shift the position of the camera.
  • a sheet locator device 96 has a wheel 98 in contact with the sheet 44 travelling in the direction of arrow 46 to record thereby the defect position on the sheet.
  • the sheet locator has output to the programmable controller 86 to indicate at any moment the lineal position on the sheet.
  • the programmable controller on determining a sensed intensity of reflected light from the camera 58 may then document or record the position on the sheet by noting the lineal foot indicator output from the sheet locator 96. It is appreciated that the programmable controller may also have data output in the form of a software disc as well as hard print copy of information recorded during any one run.
  • the single camera with multiple lamp system provides a very economical, accurate system for detecting a variety of surface imperfections simultaneously.
  • the camera may be adjusted to the single angle of reflection through which reflective light is sensed from the inspection region 54.
  • the camera angle may range from the angle ⁇ which determines the specular direction through to an angle coincident with the near dark field which is in the range of +/- 5° about ⁇ through to ⁇ 2 which may be greater than 5°.
  • Such variation of camera position about the single angle of reflection provides for enhanced detection of various types of surface imperfections.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

Appareil et procédé de vérification de la qualité de surface d'une feuille métallique en déplacement comprenant l'éclairage d'une surface de la feuille en déplacement par l'intermédiaire d'au moins deux lampes. La région éclairée par les lampes est inspectée par un dispositif de détection. L'angle d'incidence des faisceaux de lumière émanant des lampes provient des champs noirs proche et lointain. Le dispositif de détection capte des parties accentuées ou rendues brillantes de la feuille en raison d'irrégularités de surface. L'utilisation d'une multiplicité de lampes et d'un seul dispositif de détection tel qu'une caméra vidéo permet d'obtenir un système peu coûteux et cependant très sensible pour détecter des irrégularités sur la surface d'une feuille mobile. Le système peut être surveillé par un opérateur afin de déterminer les emplacements des irrégularités et le système peut être adapté pour enregistrer les emplacements des irrégularités sur la feuille en déplacement.
PCT/CA1991/000229 1990-06-22 1991-06-20 Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine Ceased WO1992000517A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54320290A 1990-06-22 1990-06-22
US543,202 1990-06-22

Publications (1)

Publication Number Publication Date
WO1992000517A1 true WO1992000517A1 (fr) 1992-01-09

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PCT/CA1991/000229 Ceased WO1992000517A1 (fr) 1990-06-22 1991-06-20 Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine

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AU (1) AU8071791A (fr)
WO (1) WO1992000517A1 (fr)

Cited By (16)

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WO1998020327A1 (fr) * 1996-11-04 1998-05-14 Kla-Tencor Corporation Systeme de controle automatise par eclairage sur fond clair ou sur fond noir
EP0893686A1 (fr) * 1997-07-25 1999-01-27 Hoogovens Technical Services Iron & Steel BV Système pour l'inspection d'une bande qui défile
EP0898163A1 (fr) * 1997-08-22 1999-02-24 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé et appareil d'inspection automatique des surfaces en mouvement
WO2001023869A1 (fr) * 1999-09-28 2001-04-05 Parsytec Ag Procede et dispositif pour inspecter la surface d'un feuillard circulant en continu
US6327374B1 (en) 1999-02-18 2001-12-04 Thermo Radiometrie Oy Arrangement and method for inspection of surface quality
GB2383841A (en) * 2001-08-13 2003-07-09 Giesecke & Devrient Gmbh Examining defects on or in sheet material
RU2216996C1 (ru) * 2002-06-06 2003-11-27 Всероссийский научно-исследовательский институт консервной и овощесушильной промышленности (Государственное научное учреждение) Способ консервирования горошка
RU2222168C1 (ru) * 2002-09-16 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ подготовки зерна перед закладкой на хранение
RU2222142C1 (ru) * 2002-08-22 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ послеуборочной обработки зерна
RU2222167C1 (ru) * 2002-09-16 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ подготовки зерна перед закладкой на хранение
RU2222198C1 (ru) * 2002-09-18 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ консервации зерна
WO2015022271A1 (fr) * 2013-08-12 2015-02-19 Thyssenkrupp Steel Europe Ag Procédé et dispositif de détection de défauts sur une surface plane
GB2526866A (en) * 2014-06-05 2015-12-09 Univ Bristol Apparatus for and method of inspecting surface topography of a moving object
US20170016832A1 (en) * 2014-03-07 2017-01-19 Nippon Steel & Sumitomo Metal Corporation Surface property indexing apparatus, surface property indexing method, and program
WO2018219775A1 (fr) * 2017-05-30 2018-12-06 Thyssenkrupp Steel Europe Ag Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv
CN109313141A (zh) * 2016-05-30 2019-02-05 鲍勃斯脱梅克斯股份有限公司 表面检查系统和检查方法

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WO1998020327A1 (fr) * 1996-11-04 1998-05-14 Kla-Tencor Corporation Systeme de controle automatise par eclairage sur fond clair ou sur fond noir
EP0893686A1 (fr) * 1997-07-25 1999-01-27 Hoogovens Technical Services Iron & Steel BV Système pour l'inspection d'une bande qui défile
WO1999005514A1 (fr) * 1997-07-25 1999-02-04 Hoogovens Technical Services Europe Bv Systeme d'inspection de la surface inferieure d'un produit en cours de laminage
US6166393A (en) * 1997-08-22 2000-12-26 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Method and apparatus for automatic inspection of moving surfaces
WO1999010730A1 (fr) * 1997-08-22 1999-03-04 Spectra-Physics Visiontech Oy Procede et appareil de controle automatique de surfaces en deplacement
EP0898163A1 (fr) * 1997-08-22 1999-02-24 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé et appareil d'inspection automatique des surfaces en mouvement
US6327374B1 (en) 1999-02-18 2001-12-04 Thermo Radiometrie Oy Arrangement and method for inspection of surface quality
WO2001023869A1 (fr) * 1999-09-28 2001-04-05 Parsytec Ag Procede et dispositif pour inspecter la surface d'un feuillard circulant en continu
US6797976B2 (en) 2001-08-13 2004-09-28 Giesecke & Devrient Method and apparatus for examining defects in or on sheet material
GB2383841A (en) * 2001-08-13 2003-07-09 Giesecke & Devrient Gmbh Examining defects on or in sheet material
GB2383841B (en) * 2001-08-13 2005-07-06 Giesecke & Devrient Gmbh Method and apparatus for examining defects in or on sheet material
RU2216996C1 (ru) * 2002-06-06 2003-11-27 Всероссийский научно-исследовательский институт консервной и овощесушильной промышленности (Государственное научное учреждение) Способ консервирования горошка
RU2222142C1 (ru) * 2002-08-22 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ послеуборочной обработки зерна
RU2222167C1 (ru) * 2002-09-16 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ подготовки зерна перед закладкой на хранение
RU2222168C1 (ru) * 2002-09-16 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ подготовки зерна перед закладкой на хранение
RU2222198C1 (ru) * 2002-09-18 2004-01-27 Всероссийский научно-исследовательский институт биологической защиты растений Способ консервации зерна
WO2015022271A1 (fr) * 2013-08-12 2015-02-19 Thyssenkrupp Steel Europe Ag Procédé et dispositif de détection de défauts sur une surface plane
US20170016832A1 (en) * 2014-03-07 2017-01-19 Nippon Steel & Sumitomo Metal Corporation Surface property indexing apparatus, surface property indexing method, and program
EP3112849A4 (fr) * 2014-03-07 2017-11-01 Nippon Steel & Sumitomo Metal Corporation Dispositif d'indexation de texture de surface, procédé d'indexation de texture de surface, et programme
US10352867B2 (en) 2014-03-07 2019-07-16 Nippon Steel Corporation Surface property indexing apparatus, surface property indexing method, and program
GB2526866A (en) * 2014-06-05 2015-12-09 Univ Bristol Apparatus for and method of inspecting surface topography of a moving object
CN109313141A (zh) * 2016-05-30 2019-02-05 鲍勃斯脱梅克斯股份有限公司 表面检查系统和检查方法
WO2018219775A1 (fr) * 2017-05-30 2018-12-06 Thyssenkrupp Steel Europe Ag Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv

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