EP1474654A1 - Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur - Google Patents

Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur

Info

Publication number
EP1474654A1
EP1474654A1 EP03704560A EP03704560A EP1474654A1 EP 1474654 A1 EP1474654 A1 EP 1474654A1 EP 03704560 A EP03704560 A EP 03704560A EP 03704560 A EP03704560 A EP 03704560A EP 1474654 A1 EP1474654 A1 EP 1474654A1
Authority
EP
European Patent Office
Prior art keywords
measurement
strip
surface shape
measuring
pattern
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.)
Withdrawn
Application number
EP03704560A
Other languages
German (de)
English (en)
Inventor
Hagen Krambeer
Ulrich Müller
Gustav Peuker
Harald Peters
Detlef Sonnenschein
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.)
BFI VDEH Institut fuer Angewandte Forschung GmbH
Original Assignee
BFI VDEH Institut fuer Angewandte Forschung GmbH
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 BFI VDEH Institut fuer Angewandte Forschung GmbH filed Critical BFI VDEH Institut fuer Angewandte Forschung GmbH
Publication of EP1474654A1 publication Critical patent/EP1474654A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Definitions

  • the invention relates to a method and device for the optical measurement of the surface shape and for the optical surface inspection of moving strips in rolling and further processing plants.
  • the strip flatness is therefore preferably measured contactlessly in hot strip mills.
  • it is known to measure flatness deviations with the aid of light points projected onto the strip.
  • the spatial position of the light spot which is preferably generated with the aid of a laser beam on the strip surface, is detected with a distance sensor.
  • the two plane location coordinates of a certain surface point are known from the relative position between the scanning or illuminating beam and the surface of the strip.
  • the height coordinate of the surface point that is currently being measured is detected by a location-sensitive detector. With the height coordinate, the position of the imaging point on the sensor changes at the same time.
  • a flatness image can be created across the entire width of the strip, which is composed of the measurement results of the light points projected onto the strip at certain intervals.
  • the areas between the light points are which, however, are not recorded in this method and form strip-shaped measurement gaps in the case of a continuous strip, the flatness of which is not determined.
  • An interference pattern is generated on the object surface by means of a light source.
  • CCD Charge-Coupled Device
  • the camera is arranged so that there is an angle between the surface light source and the camera.
  • a reference grid in the image plane creates a so-called moire effect by superimposing the recorded pattern on the reference pattern.
  • the height differences can be determined quantitatively from the Moire lines.
  • Moire technology provides more precise measurement results than measuring with light points; it also covers essentially the entire measurement area and avoids the measurement gaps mentioned above. However, use in a hot strip mill is problematic.
  • a device for measuring the surface of a metal strip is known from US Pat. No. 5,488,478, in which lines are generated on the metal surface with the aid of a laser beam, which lines are recorded by a plurality of linescan cameras and evaluated by comparison with a reference pattern for determining the surface geometry. This device requires considerable design effort and, moreover, only allows a rough partial statement about the surface geometry of the belt.
  • DE 197 98 992 B1 discloses a method in which a line pattern is generated on the measurement surface by projection, the line pattern is recorded with a camera that resolves the line pattern, and the recorded measurement data are compared with a reference measurement. With the help of a process computer, the measurement results are immediately converted and coordinated into control parameters for the finishing train and the reel.
  • This method has the particular advantage of high immunity to interference, which is important in a rolling mill, since no sensitive laser optics are used, but an insensitive slide projector can be used.
  • the measuring surface is to be understood here as the surface of the moving or stationary rolling stock (strips or sheets).
  • a projector with a slide creates a line pattern on the surface of the rolling stock.
  • the projector is arranged above the hot strip and projects the line pattern onto the surface of the rolling stock, so that the lines preferably extend transversely to the longitudinal axis of the strip or sheet metal and thus cover the entire strip or sheet width.
  • a CCD camera with a resolution of, for example, eight pixels per line captures the lines running across the surface of the tape. At a absolute band flatness, a uniform pattern of straight lines with unchanged line spacing is created.
  • Deviations of the belt surface from the ideal level cause a change in the line spacing in the area of the unevenness.
  • the camera detects this change. It can be easily converted into height differences by comparison with an ideal pattern.
  • This system enables the actual height differences of the strip surface to be determined quickly and thus enables real-time detection of continuous strip sections. This has the advantage that the measurement results allow the rolling parameters to be adjusted immediately after an unevenness has occurred.
  • the invention also allows the transverse curvature of the band to be determined.
  • Conventional measuring systems only record the ribbon fiber length.
  • the measuring lines can also be adapted to different conditions with regard to their intensity and line thickness. The problems of fine, low-intensity and low-contrast moire lines do not arise.
  • the system is particularly suitable for measuring on the hot strip running out of the finished batch in conjunction with a measurement of the strip on the reel. With this arrangement, changes in the flatness of the strip due to the strip cooling between the finished stack and the reel can be recorded and used for flatness control.
  • the measurement data can be used to regulate the finished batch, the reel and to control the cooling section. Measurement results that contain a deviation of the soli value result in an immediate and coordinated adjustment of the parameters for the finishing batch, the cooling section and the reel.
  • the system can also be used in downstream production lines, for example in the control of stretch leveling systems and in pickling lines.
  • the relevant quality characteristics for the rolling and further processing of strips and sheets also include the dimensional accuracy of the geometric sizes, such as thickness, thickness cross profile and width, as well as the surface quality, which is recorded with the help of surface inspection systems. Adherence to narrow tolerances is desirable and not only a measure of the quality of the ready-to-sell product, but also important for a trouble-free operation of the entire processing process, especially with ever increasing automation of production processes.
  • single-purpose devices such as, for example, optical systems for recording the flatness (flatness measurement systems), the bandwidth (width measurement systems) and the surface quality (surface inspection systems) and radiometric systems for recording the strip thickness or the strip thickness transverse profile.
  • optical systems for recording the flatness (flatness measurement systems), the bandwidth (width measurement systems) and the surface quality (surface inspection systems) and radiometric systems for recording the strip thickness or the strip thickness transverse profile.
  • These systems work independently of one another and are spatially separated from one another in order to prevent mutual interference, which requires a considerable amount of installation space.
  • Optical systems are preferably used in the prior art for surface inspection. These usually have the following components:
  • Illumination unit for illuminating the belt surface, a camera unit for seamless recording of the belt surface, a computer unit for processing the camera image information and an interface unit for process integration and display of the classification results.
  • the lighting should preferably be designed so that the errors that can occur on the special production line are detected with the best possible optical contrast.
  • stroboscopic illuminations are usually used, which emit the required amount of light in a short time interval.
  • Narrow continuous lighting units are usually used in line scan camera systems, the motion blur being suppressed by the electronic shutter of the cameras.
  • the camera technology is preferably dimensioned such that the minimum error size can still be resolved under all speed conditions of the belt.
  • the image is recorded based on the tape length.
  • the image brightness is preferably regulated automatically.
  • Line scan cameras are clearly overweight, since line scan camera systems were first available on the market and were initially used on relatively easy to inspect surfaces with lower requirements , Many systems that use matrix cameras have only been set up in the last two to three years and, not least because of this, partly in the run-in phase or in the performance test. At present it can be said that there is in principle no significant difference between the performance and the matrix and line scan camera systems. Line scan camera systems are, however, less complex to set up and operate.
  • the resolution of the cameras is determined by the smallest error size to be classified and is subject to the optical imaging laws.
  • the minimum error size is preferably covered by at least 16 pixels that are detected, ie recognized by the system as defective, in order to achieve a good classification in the subsequent processing.
  • the choice of the direction of observation and the inclination of the cameras is important in order to optimize the special error maps. Bright field and dark field observations are predominant, and side field observations have recently also been used.
  • the optimal installation conditions for the respective application can be developed from the combination of the different lighting and camera arrangements.
  • the continuously recorded surface images can be checked for their information content in the image processing unit.
  • the characteristics of the "fault patterns” can be compared with stored fault characteristics. If there is a corresponding match, the automatic classification into one of the "pre-trained” error classes can take place.
  • the extraction and comparison of image features currently requires high computing power.
  • the inspection systems currently available compare the recorded pixels with threshold values. Pixels recognized as defective are set, all others are not set. Parameters for classification are obtained from these "binary images" and the brightness information stored for each pixel.
  • the interface unit is usually designed to be application-specific in order to provide the surface inspection system with the important belt and control information at the right time. This is a standard task in automation and data technology.
  • the invention is based on the object of creating a system which allows improved measurement and can also be designed to save space. To achieve this object, a method and a device according to the independent claims are provided.
  • the invention is based on the idea of merging the flatness measurement and the surface inspection on the basis of an image acquisition with preferably high-resolution, fast line cameras.
  • the system can also be used to measure the strip or sheet width.
  • the number of components required is reduced by "multiple use", in particular the lighting unit.
  • the space required is significantly reduced compared to single-purpose measurement systems.
  • Including the results of the surface shape measurement in the width measurement increases the measurement reliability of the width measurement in the case of a non-flat strip shape.
  • Including the results of the surface shape measurement in the surface inspection enables a distortion-free representation of the error, in particular in the case of strips which are not in the pass-line or have no flat strip shape as a result of fluttering movements.
  • the image capture by line scan cameras is also made possible in an area in which the tape is not tightened by additional devices, for example on a deflection roller. Including the results of the surface shape evaluability significantly reduces the pseudo-error proportion of the surface inspection.
  • the method according to the invention for the optical measurement of the surface shape and for the optical surface inspection can be used for any moving or stationary long body, preferably for strips and sheets.
  • Fi ⁇ . 2 the arrangement of a projector and a camera behind a finishing line
  • Fig. 4 a block diagram of the flatness control.
  • EicL_5 and 6 the integration according to the invention of the flatness measurement and surface inspection in one device.
  • the device according to the invention preferably has a structure according to FIG. 5, in which the line cameras lie on the same axis as the projector.
  • Measuring lines 2 running transversely to the tape 1 are generated by a projector 3 on the measuring or tape surface 4.
  • the measuring arrangement is arranged on the one hand in the outlet of the finished series 6 and on the other hand in front of the reel 7 on a measuring house 13.
  • the CCD camera 5 is located on the side of the measuring house facing away from the reel 6 in a water-cooled housing.
  • the projector 3 is arranged on the side of the measuring house facing the reel 6. Cooling air is applied to the housing to dissipate heat. The cooling of the projector 3 and the camera 5 is necessary to dissipate the internal heat and the heat radiation emanating from the band 1, which is approximately 1000 ° C.
  • a xenon light source for example, can be used as the projector, which also produces a legible line pattern on hot rolled material.
  • Unevenness on the belt surface 4 causes an irregular course of the measuring lines 2 or their deviation from the geometrical straight line.
  • the measuring lines 2 and thus also their course changed by unevenness are recorded.
  • the measurement image is compared arithmetically with a previously recorded reference pattern. The differences directly result in the height differences and the parameters for controlling the finishing train. This creates a complete flatness of the strip or sheet 1 moving in the direction of the arrow. In principle, however, the measurement can also take place when the rolling stock is at rest.
  • the structure according to the invention results from the diagram of the flatness control (FIG. 4).
  • the hot strip 1 passes through the finishing train 6 and the strip cooling 8 to the reel 7 in the reel pit.
  • the flatness of the hot strip is recorded, analyzed and used to control the last stands of the finishing train (roll bending and swiveling).
  • This inner flatness control loop 9 is supplemented by an outer flatness control loop 10.
  • the outer flatness control loop 10 is set up to adapt the setpoint of the inner control loop.
  • a first subordinate control loop 11 is also generated, which allows the setpoint for the cooling section 8 to be adjusted, and a second subordinate control loop 12, which allows the setpoint for the reel train 7 to be adjusted.
  • the belt surface is scanned for the detection of defects by additionally installed high-resolution fast line cameras (FIG. 5), which enable the surface to be recorded over the entire bandwidth.
  • Both line scan cameras are aligned with a ("bright") strip that is illuminated by the projector.
  • the optical axis of the camera is in each case in the direction of the projection beams, so that the respective illuminated strip is detected by the line camera even if the height of the strip surface changes.
  • the adapted arrangement of the two line scan cameras taking into account the arrangement of the projector relative to the surface of the tape, means that one camera works in the "bright field” and the second in the "dark field” (FIG. 5), which is necessary to optimize the detection performance in the case of surface defects of different characteristics ,
  • the Images from both cameras are fed to an image processing unit for error identification.
  • the height profiles determined with the flatness measuring system along the measuring fields of the line cameras can be used for geometrically correcting the images of the line cameras.
  • the identification of faults such as cross cracks and edge cracks, which can occur in the rolling process due to the local exceeding of the breaking strength, can be improved by directly linking the information from the flatness measurement - in particular the elongation profile transversely to the longitudinal direction - and the fault patterns , at the same time an indication of the cause of the error can be derived.
  • the image information from both line scan cameras can be used in combination with the results of the parallel flatness measurement for the quantitative determination of the strip edge position and the bandwidth with high resolution.
  • the height profiles along the measuring fields of the line scan cameras determined with the flatness measuring system and the strip edge information detected by the line scan cameras are used for a geometric transformation.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés à mesurer de manière optique la forme d'une surface et à inspecter de manière optique la surface de corps oblongs mobiles. L'invention est caractérisée en ce qu'elle permet à la fois la mesure et l'inspection de la surface. Selon l'invention, un projecteur projette un motif de lignes sur l'objet à mesurer. Une caméra réalise des prises de vue la surface de l'objet à mesurer et compare les informations d'image avec un motif de référence. Deux caméras de balayage haute-résolution détectent de plus des défauts de surface sur l'objet à mesurer. La technique de mesure de l'invention est adaptée en particulier pour une mesure combinée de la planéité et de la surface pour des feuillards métalliques dans des installations de laminage.
EP03704560A 2002-02-07 2003-02-06 Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur Withdrawn EP1474654A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10205132 2002-02-07
DE10205132A DE10205132A1 (de) 2002-02-07 2002-02-07 Verfahren und Vorrichtung zum optischen Messen der Oberflächenform und zur optischen Oberflächeninspektion von bewegten Bändern in Walz- und Weiterbearbeitungsanlagen
PCT/EP2003/001182 WO2003067188A1 (fr) 2002-02-07 2003-02-06 Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur

Publications (1)

Publication Number Publication Date
EP1474654A1 true EP1474654A1 (fr) 2004-11-10

Family

ID=27634797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03704560A Withdrawn EP1474654A1 (fr) 2002-02-07 2003-02-06 Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur

Country Status (7)

Country Link
US (1) US7317542B2 (fr)
EP (1) EP1474654A1 (fr)
JP (1) JP2005517165A (fr)
KR (1) KR100914897B1 (fr)
AU (1) AU2003206853A1 (fr)
DE (1) DE10205132A1 (fr)
WO (1) WO2003067188A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59914224D1 (de) * 1998-09-14 2007-04-12 Betr Forsch Inst Angew Forsch Verfahren zum Messen der Geometrie und Planheit von bewegtem Metallband
WO2001051887A1 (fr) * 2000-01-07 2001-07-19 Cyberoptics Corporation Systeme de profilometrie de phase dote d'un projecteur telecentrique
DE10205132A1 (de) * 2002-02-07 2003-08-28 Bfi Vdeh Inst Angewandte Forschung Gmbh Verfahren und Vorrichtung zum optischen Messen der Oberflächenform und zur optischen Oberflächeninspektion von bewegten Bändern in Walz- und Weiterbearbeitungsanlagen
JP5089166B2 (ja) * 2003-03-14 2012-12-05 ルドルフテクノロジーズ インコーポレイテッド プローブカードアナライザにおける部品のたわみの影響を軽減する方法
DE102005018855B4 (de) * 2005-04-22 2010-01-28 Theta System Elektronik Gmbh Vorrichtung zur Inspektion von Druckererzeugnissen
DE102005023270A1 (de) * 2005-05-20 2006-11-23 Sms Demag Ag Verfahren und Vorrichtung zur Herstellung eines Metallbandes
JP2006349534A (ja) * 2005-06-16 2006-12-28 Fujinon Corp 動体測定用干渉計装置および動体測定用光干渉計測方法
US8205474B2 (en) * 2006-03-08 2012-06-26 Nucor Corporation Method and plant for integrated monitoring and control of strip flatness and strip profile
CN101422787B (zh) * 2008-12-10 2011-04-20 北京科技大学 基于单步相移法的带钢平坦度测量方法
DE102009002569A1 (de) * 2009-04-22 2010-10-28 Manroland Ag Verfahren zur Bestimmung der Qualität eines Druckprodukts
CN102749336B (zh) * 2012-07-09 2015-01-07 南京航空航天大学 一种基于结构光的表面缺陷高速检测***及其检测方法
WO2015175702A1 (fr) * 2014-05-14 2015-11-19 Kla-Tencor Corporation Système d'acquisition d'image, procédé d'acquisition d'image, et système d'inspection
CN105651211B (zh) * 2016-03-08 2018-05-18 哈尔滨工程大学 一种基于几何光学的镜面出平面位移测量装置及其测量方法
KR101881752B1 (ko) 2016-11-24 2018-08-24 한국표준과학연구원 라인빔을 사용하는 결함검출모듈 및 상기 결함검출모듈 어레이를 이용한 결함검출장치
JP6645526B2 (ja) * 2017-02-24 2020-02-14 Ｊｆｅスチール株式会社 鋼板形状計測装置および鋼板形状矯正装置
DE102017108786A1 (de) * 2017-04-25 2018-06-14 Muhr Und Bender Kg Verfahren und Vorrichtung zum Ermitteln der Planheit von Bandmaterial und Bearbeitungsanlage mit einer solchen Vorrichtung
US11833560B2 (en) * 2019-07-22 2023-12-05 Jfe Steel Corporation Meandering control method, meandering control device, and hot rolling equipment for hot rolled steel strip

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170572A2 (fr) * 2000-06-30 2002-01-09 Thermo Radiometrie Oy Appareil et procédé pour déterminer la forme de surface

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165939A (en) * 1975-01-22 1979-08-28 Tsn Company, Inc. Apparatus for inspection and dimensional measurement by sequential reading
US4349277A (en) * 1980-06-11 1982-09-14 General Electric Company Non-contact measurement of surface profile
DE3115634A1 (de) * 1981-04-18 1982-11-04 Feldmühle AG, 4000 Düsseldorf Verfahren und vorrichtung zum pruefen von durch kreislinien begrenzten flaechen
JPH03274405A (ja) * 1990-03-26 1991-12-05 Kanegafuchi Chem Ind Co Ltd 物体の表面性状検査測定装置
US5309222A (en) * 1991-07-16 1994-05-03 Mitsubishi Denki Kabushiki Kaisha Surface undulation inspection apparatus
GB9203448D0 (en) * 1992-02-18 1992-04-01 British Steel Plc Shape detection
JPH06102197A (ja) * 1992-09-21 1994-04-15 Kawasaki Steel Corp 表面欠陥検出方法
US5367378A (en) * 1993-06-01 1994-11-22 Industrial Technology Institute Highlighted panel inspection
DE19709992C1 (de) * 1997-03-11 1998-10-01 Betr Forsch Inst Angew Forsch Verfahren zum Messen der Oberflächengeometrie von Warmband
SE9902753D0 (sv) 1999-07-21 1999-07-21 Regis Munoz Device for observing and controlling or more textile yarns by a succession of numerical photographs
DE10205132A1 (de) * 2002-02-07 2003-08-28 Bfi Vdeh Inst Angewandte Forschung Gmbh Verfahren und Vorrichtung zum optischen Messen der Oberflächenform und zur optischen Oberflächeninspektion von bewegten Bändern in Walz- und Weiterbearbeitungsanlagen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170572A2 (fr) * 2000-06-30 2002-01-09 Thermo Radiometrie Oy Appareil et procédé pour déterminer la forme de surface

Also Published As

Publication number Publication date
US7317542B2 (en) 2008-01-08
JP2005517165A (ja) 2005-06-09
KR100914897B1 (ko) 2009-08-31
KR20040083442A (ko) 2004-10-01
US20050157302A1 (en) 2005-07-21
DE10205132A1 (de) 2003-08-28
AU2003206853A1 (en) 2003-09-02
WO2003067188A1 (fr) 2003-08-14

Similar Documents

Publication Publication Date Title
EP1418400B1 (fr) Laminoir
EP1474654A1 (fr) Procede et dispositif de mesure optique de la forme de surfaces et d'inspection optique de surfaces de feuillards mobiles dans des installations de laminage et de traitement ulterieur
EP0713447B1 (fr) Dispositif de verification d'image d'un produit imprime
EP0884182B1 (fr) Procédé de regulation des operations effectuées par une machine d'impression
DE69129518T2 (de) Abtaster für Druckmuster
DE69021207T2 (de) Einrichtung zum gleisgebundenen erfassen des radprofiles von rädern eines zuges.
DE3619412A1 (de) Verfahren und vorrichtung zur walzspaltmessung und regelung
DE19912500A1 (de) Verfahren und Vorrichtung zum Bestimmen von Eigenschaften einer laufenden Materialbahn
EP1904260A1 (fr) Procede et dispositif pour determiner un mouvement relatif lateral entre une tete d'usinage et une piece
DE2811778A1 (de) Vorrichtung und verfahren zum steuern einer strangwalzanlage
EP1850979B1 (fr) Procede et dispositif pour surveiller le processus de fabrication utilise pour produire des tubes en acier finis a chaud
DE102013108722B4 (de) Verfahren und Vorrichtung zum Erfassen von Defekten einer ebenen Oberfläche
DD273505A5 (de) Verfahren zur automatischen Erkennung von Fehlern in bewegten Warenbahnen
EP2183064B1 (fr) Cage de laminage a chaud comprenant un enrouleur et un dispositif pour déterminer une température d'un produit laminé à chaud, et procédé de commande et/ou de régulation d'une température d'un produit laminé à chaud
DE102009021136A1 (de) Regelvorrichtung
WO2004063664A1 (fr) Procede et dispositif de controle de surface
EP2986934B1 (fr) Procédé de vérification
DE10151332B4 (de) Vorrichtung zur optischen Messung von Oberflächeneigenschaften
DE10131897A1 (de) Verfahren und Messvorrichtung zum Detektieren eines Objekts
CH704499B1 (de) Verfahren und Gerät zum optischen Prüfen extrudierter Güter.
DE2252860A1 (de) Einrichtung zum optischen erfassen von oberflaechenfehlern an einem metallband
DE102010029627A1 (de) Vorrichtung und Verfahren zur Bestimmung der Struktur einer spiegelnden Oberfläche eines Objekts
WO2010094268A2 (fr) Dispositif et procédé de mesure d'un corps
DE102022125357A1 (de) Verfahren und Oberflächeninspektionssystem sowie Computerprogramm und computerlesbares Speichermedium zur Vermessung und / oder Inspektion von Oberflächen eines Objektes
EP0788851A2 (fr) Procédé et dispositif pour l'inspection d'une filière

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040903

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

17Q First examination report despatched

Effective date: 20080724

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VDEH-BETRIEBSFORSCHUNGSINSTITUT GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: G01B 11/30 20060101ALI20160929BHEP

Ipc: G01B 11/25 20060101ALI20160929BHEP

Ipc: B21B 38/00 20060101AFI20160929BHEP

Ipc: G01N 21/89 20060101ALI20160929BHEP

Ipc: B21B 38/02 20060101ALI20160929BHEP

INTG Intention to grant announced

Effective date: 20161024

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170304