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WO2018219775A1 - Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv - Google Patents

Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv Download PDF

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Publication number
WO2018219775A1
WO2018219775A1 PCT/EP2018/063646 EP2018063646W WO2018219775A1 WO 2018219775 A1 WO2018219775 A1 WO 2018219775A1 EP 2018063646 W EP2018063646 W EP 2018063646W WO 2018219775 A1 WO2018219775 A1 WO 2018219775A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
light
belt
wetting
oil
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/EP2018/063646
Other languages
German (de)
English (en)
Inventor
Jürgen Scharlack
Lorenz TIELSCH
Kersten FRIESE
Andreas WESTERFELD
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.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
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 ThyssenKrupp Steel Europe AG, ThyssenKrupp AG filed Critical ThyssenKrupp Steel Europe AG
Publication of WO2018219775A1 publication Critical patent/WO2018219775A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • G01N21/8422—Investigating thin films, e.g. matrix isolation method
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G01N21/6456—Spatial resolved fluorescence measurements; Imaging
    • G01N2021/646—Detecting fluorescent inhomogeneities at a position, e.g. for detecting defects
    • 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
    • G01N2021/8411—Application to online plant, process monitoring
    • 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
    • G01N21/8422—Investigating thin films, e.g. matrix isolation method
    • G01N2021/8427—Coatings
    • G01N2021/8433—Comparing coated/uncoated parts
    • 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
    • G01N21/86—Investigating moving sheets
    • G01N2021/8609—Optical head specially adapted
    • G01N2021/8627—Optical head specially adapted with an illuminator over the whole width
    • 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
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G01N21/6456—Spatial resolved fluorescence measurements; Imaging

Definitions

  • the present invention relates to a method for detecting the degree of wetting of the surface of a longitudinally moving strip of at least one material by irradiating the surface to be examined over its entire width with UV light and detecting the radiation reflected from the surface by means of a sensor over the entire width the surface, wherein the UV light source and the at least one sensor are mounted stationary to each other and to the moving belt, a corresponding device and the use of this device.
  • DE 10 2008 050 598 A1 discloses a system for detecting media, for example oil, on surfaces.
  • the surface is irradiated with radiation from a radiation source.
  • the reflected radiation is then detected by a sensor and evaluated, so as to be able to determine the wetting on the surface.
  • Radiation source and sensor are movably arranged in this process, so that they traverse over the surface during the measurement, since a complete detection of the entire surface with this method is not possible.
  • the present invention therefore has for its object to provide a method with which the degree of wetting of the surface of a strip, in particular a steel strip, can be detected so as to be able to detect whether a sufficient film of a medium, in particular an oil film, is present on the surface. is present. It should be possible to be able to continuously observe a section of a band across the entire width, so that the corresponding information is accessible as quickly as possible. Furthermore, it should be possible for the process to be carried out directly in an oil machine known to the person skilled in the art.
  • the present invention therefore relates to a method for detecting the degree of wetting of the surface of a longitudinally moving strip of at least one material by irradiating the surface to be examined over its entire width with UV light and detecting the radiation reflected from the surface via at least one sensor entire width of the surface, wherein the UV light source and the at least one sensor are fixedly attached to each other and to the moving belt.
  • Essential to the invention is that the UV light source and the at least one sensor are fixedly attached to each other and to the moving belt. These features of the present invention provide the advantages that the belt moving in the longitudinal direction can be observed continuously and over the entire width. On the one hand, this significantly increases the speed of the method according to the invention over prior art methods. Furthermore, the method according to the invention eliminates the step in which an image of the surface over the entire width must be created from a plurality of individual images, so that it is less prone to error. Furthermore, in comparison to the prior art less moving components are present, so that overall the maintenance costs and the accident risk are significantly reduced.
  • the band moving in the longitudinal direction is irradiated over the entire width with the UV light source, and the sensor detects the reflected radiation in the visible range over the entire width of the band.
  • the belt can be observed by the sensor at one time across the entire width and at each point of the belt.
  • the traverse speeds in prior art devices are 250 to 500 mm / s, i. in that at a standard belt speed of 120 m / min and a belt width of 2000 mm, 16 to 32 m of the belt move under the sensor until it is in the same position again, so that most of the belt is not detected by the sensor.
  • the degree of wetting of a belt moved in the longitudinal direction is determined from at least one material.
  • the at least one material is preferably metallic surfaces such as steel, aluminum, copper alloys or stainless steel.
  • the material is steel, d. H .
  • the surface of a flat steel product, in particular a steel strip is preferably determined.
  • the present invention therefore preferably relates to the method according to the invention, wherein the strip of at least one material is a flat steel product, more preferably a steel strip.
  • the width of the tape is preferably 550 to 2200 mm and the thickness of the tape 0.4 to 4.0 mm.
  • the present invention therefore preferably relates to the method according to the invention, wherein the width of the tape is 550 to 2200 mm and the thickness of the tape is 0, 4th to 4 mm.
  • the length of the band is for example 100 to 7000 m. It should be noted that the inventive method is preferably carried out continuously, d. H . a very long belt is moved in the longitudinal direction while the process according to the invention is carried out. Therefore, preferably only a section of the total length of the strip is observed with the method according to the invention.
  • the moving belt which is observed according to the invention, has been obtained in a preferred embodiment of the process according to the invention by appropriate methods known to the person skilled in the art, for example hot and / or cold rolling.
  • the process of the invention is preferably carried out after oiling the surface of the steel strip.
  • the process according to the invention very particularly preferably takes place in an oil machine known to the person skilled in the art directly after the oiling of the steel strip.
  • the degree of wetting of the surface is defined as the ratio of unwetted surface of the tape to the entire surface of the tape to be examined. According to the invention, it is thus preferably detected whether the surface to be examined is completely covered with a medium. Complete coverage of the surface with the oil corresponds to a degree of wetting of 1. If there are sites on the surface which are not covered with the medium, the degree of wetting is less than 1. Wetting degrees of less than 1 are undesirable and should be achieved by the process according to the invention be detected.
  • either only the upper side of the moving belt, or only the underside of the moving belt or both top and bottom of the moving belt, can be observed.
  • a comparison of the detected values can be carried out more preferably.
  • the skilled person refers to sites on the surface that are not completely wetted with the medium, in particular an oil, as so-called dry spots.
  • the process of the invention preferably serves to prevent dry spots, i. incompletely wetted sites, on the surface of a longitudinally moving belt of at least one material to detect.
  • the present invention therefore preferably relates to the process of the invention wherein dry spots, i. incompletely wetted sites are detected on the surface of a longitudinally moving belt of at least one material.
  • the layer thickness of the medium is determined by the inventive method, for example, the detected image of the medium film, in particular the oil film, be evaluated with a suitable software, so that the detected gray or color values inference to the Allow layer thickness.
  • the light detected by the sensor is converted in the visible range into corresponding gray values. These gray values can then be used to determine how complete or strong the wetting of the tape is.
  • the conversion of the signal detected by the sensor into corresponding gray values can be carried out by methods known to the person skilled in the art respectively. Low gray values correspond to low wetting by the medium, high gray values correspond to high wetting by the medium.
  • a medium is preferably understood as meaning a liquid which is applied as a film to the surface of the strip.
  • the film thickness is preferably 0.30 ⁇ to 2.5 ⁇ , more preferably 0.33 ⁇ to 2.2 ⁇ .
  • Preferred media according to the invention are selected, for example, from hydrophobic media, for example oils, or aqueous compositions, for example emulsions.
  • the medium present on the surface is a hydrophobic medium, preferably an oil.
  • the present invention therefore preferably relates to the process according to the invention, wherein the surface is wetted with a hydrophobic medium, preferably an oil.
  • the amount of medium, preferably oil, which is present on the surface is not limited according to the invention, preferably 0.3 to 2 g / m 2 of the medium, preferably of the oil, is present on the surface.
  • the surface to be examined is irradiated over its entire width with UV light. More preferably, the entire width of the tape is irradiated as uniformly as possible with UV light, i.
  • the intensity of the UV light differs in individual sections of the width of the belt by no more than 5% with respect to the maximum value of the intensity during the measurement.
  • the surface to be examined is irradiated with UV light, in particular with UV-A light, UV-B light or UV-C light.
  • the present invention preferably relates to the method according to the invention, wherein the surface to be examined is irradiated with UV-A light.
  • the preferred type of radiation UV-A light according to the invention is known per se to a person skilled in the art.
  • UV-A light has a wavelength of 380 to 315 nm.
  • the surface to be examined is irradiated with UV-C light.
  • UV-C light is known per se to the person skilled in the art.
  • UV-C light has a wavelength of 10 to 280 nm.
  • Suitable radiation sources for UV light, in particular UV-A light are known to the person skilled in the art, for example UV LEDs, in particular UV-A LEDs or standard UV lamps, in particular standard UV lamps.
  • the surface to be examined is irradiated with UV light and the radiation reflected or emitted by the surface is then detected by means of at least one sensor over the entire width of the surface.
  • light is detected in the range from 300 to 600 nm with the sensor.
  • Suitable sensors are known per se to those skilled in the art, for example photosensors.
  • a camera is preferably used.
  • the present invention therefore preferably relates to the method according to the invention, wherein a camera is used as at least one sensor. The method according to the invention can therefore be realized particularly easily.
  • the reflected radiation means the part of the radiation applied to the surface, which is reflected by the medium present on the surface or by the surface.
  • the emitted radiation is understood to mean the radiation which is emitted by the medium present on the surface or by the surface after excitation by irradiation with UV light.
  • This emission is preferably fluorescence according to the invention. Fluorescence is known per se to the person skilled in the art. The fluorescence is excited by irradiation of the medium present on the surface, for example of the oil, with UV light. If this UV light strikes a medium, for example oil, depending on the medium and the amount of medium applied, part of the emitted UV light is absorbed and emitted again as fluorescence.
  • a sensor is used, which can simultaneously measure reflected and emitted radiation.
  • two sensors can also be used, one of which can detect the reflected radiation and the second the emitted radiation.
  • the detection of the radiation reflected or emitted by the surface of the strip by the at least one sensor is preferably followed by an evaluation of the data obtained.
  • the present invention therefore preferably relates to the method according to the invention, wherein an evaluation is followed by the detection of the radiation reflected by the surface.
  • Methods for the evaluation of corresponding data are known to the person skilled in the art and are preferably carried out with a corresponding evaluation software. Is determined by the inventive method that the degree of wetting on the surface of the tape is not sufficient, i.
  • a further process step may be initiated, for example stopping the belt and oiling in order to be able to correct the error that has occurred; For example, by flushing the Olmaschine, in particular the oil beam in the Olmaschine an improvement, ie an increased degree of wetting without dry spots can be obtained.
  • the UV light source and the at least one sensor are fixedly attached to one another and to the moving belt.
  • "stationary to one another and to the moving belt” means that the UV light source and at least one sensor are mounted such that the UV light source and at least one sensor are arranged statically, and the belt moves past them,
  • This feature according to the invention has the advantage that the detection with a static measuring arrangement is simpler and more accurate.
  • the at least one sensor and the UV light source is mounted on a support which is arranged to the moving belt, that the tape can move freely and it is simultaneously possible that the entire width of the tape through irradiated the UV light source and can be observed with the at least one sensor.
  • Methods of attaching the UV light source and the at least one sensor to a support and attaching it to the moving belt according to the present invention are known to those skilled in the art.
  • the UV light source and the at least one sensor more preferably on a common carrier, in the immediate vicinity of the Olmaschine, preferably mounted directly in the Olmaschine, so that the inventive method directly after the application of the medium, in particular the B ⁇ L , can be done.
  • the inventive method is carried out so that a protective housing against extraneous light is present around the UV light source and the at least one sensor.
  • This preferred embodiment has the advantage that the measurement accuracy is significantly increased by the absence of extraneous light.
  • Another advantage of the method according to the invention is that it can be carried out in comparison with the methods known from the prior art with significantly less effort and therefore is considerably less expensive.
  • the present invention also relates to a device for detecting the degree of wetting of the surface of a longitudinally moving belt of at least one material comprising a UV light source which irradiates the entire width of the belt and at least one sensor which detects the entire width of the surface the UV light source and the at least one sensor are fixedly attached to each other and to the moving belt. Details and preferred embodiments of the device according to the invention have already been mentioned with respect to the method according to the invention and apply here accordingly.
  • the device according to the invention is preferably mounted in the immediate vicinity of, for example, after the oil machine, or directly in an oil machine known to those skilled in the art.
  • the present invention therefore preferably relates to the device according to the invention, wherein it is in close proximity to, for example, after the oil machine, or mounted directly in an oil machine.
  • the present invention also relates to the use of the device according to the invention for detecting the degree of wetting of the surface of a longitudinally moving belt of at least one material. Details and preferred embodiments of the use according to the invention have already been mentioned with respect to the method according to the invention and apply here accordingly.
  • the method according to the invention and the device according to the invention can advantageously be used in quality control in the coating of steel strips and in the deformation of oiled steel strips.
  • FIG. 1 shows a preferred device according to the invention for carrying out the method according to the invention.
  • the reference numerals have the following meanings:

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

Abstract

La présente invention concerne un procédé de détection du degré de mouillage de la surface d'une bande (5) déplacée dans la direction longitudinale (1) et un dispositif correspondant. La surface de la bande (5) est irradiée par une source de lumière UV (2) sur toute la largeur de la bande et la lumière réfléchie ou émise au niveau de la surface est mesurée au moyen d'au moins un capteur (3) sur toute sa largeur. Le procédé et le dispositif sont utilisés pour déterminer un degré de mouillage de bandes d'acier avec de l'huile.
PCT/EP2018/063646 2017-05-30 2018-05-24 Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv Ceased WO2018219775A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017209062.6 2017-05-30
DE102017209062.6A DE102017209062B4 (de) 2017-05-30 2017-05-30 Erkennung von trockenen Fehlstellen auf beölten Stahlbändern mittels UV-Licht

Publications (1)

Publication Number Publication Date
WO2018219775A1 true WO2018219775A1 (fr) 2018-12-06

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ID=62567611

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/063646 Ceased WO2018219775A1 (fr) 2017-05-30 2018-05-24 Détection d'emplacements défectueux secs sur des bandes d'acier huilées à l'aide de lumière uv

Country Status (2)

Country Link
DE (1) DE102017209062B4 (fr)
WO (1) WO2018219775A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111141755A (zh) * 2019-12-31 2020-05-12 国联汽车动力电池研究院有限责任公司 一种电池电芯内部缺陷的检测方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001353A (en) * 1989-01-17 1991-03-19 Sumitomo Light Metal Industries, Ltd. Method and apparatus to measure the thickness of coating films
WO1992000517A1 (fr) * 1990-06-22 1992-01-09 Alcan International Limited Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine
US5274243A (en) * 1992-05-29 1993-12-28 Eastman Kodak Company Cylindrical allumination system for inspection of sheet material
JPH06281593A (ja) * 1993-03-25 1994-10-07 Kawasaki Steel Corp 表面検査方法及びその装置
JPH09178667A (ja) * 1995-10-24 1997-07-11 Nkk Corp 表面検査装置
JP2002333310A (ja) * 2001-03-09 2002-11-22 Nippon Steel Corp 塗油量分布測定装置及び塗油量分布測定方法
JP3591160B2 (ja) * 1995-10-09 2004-11-17 Ｊｆｅスチール株式会社 表面検査装置
DE102008050598A1 (de) 2007-10-09 2009-04-16 Kaushal, Christian, Dipl.-Ing. (FH) System zur Detektion von Medien auf Oberflächen
JP5104443B2 (ja) * 2008-03-21 2012-12-19 Ｊｆｅスチール株式会社 表面検査装置および方法

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Publication number Priority date Publication date Assignee Title
GB2219081B (en) * 1988-05-06 1992-12-02 Gersan Ets Identifying specific objects or zones
US5717216A (en) * 1996-10-16 1998-02-10 Reynolds Metals Company Thickness gauging using ultraviolet light absorption
DE102005041173A1 (de) * 2004-08-31 2006-03-09 Db Fernverkehr Ag Verfahren und Vorrichtung zur Bewertung von Benetzungen von Objekten bei hoher Gschwindigkeit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001353A (en) * 1989-01-17 1991-03-19 Sumitomo Light Metal Industries, Ltd. Method and apparatus to measure the thickness of coating films
WO1992000517A1 (fr) * 1990-06-22 1992-01-09 Alcan International Limited Systeme d'eclairage servant a la verification a grande vitesse de la surface d'une feuille d'aluminium lamine
US5274243A (en) * 1992-05-29 1993-12-28 Eastman Kodak Company Cylindrical allumination system for inspection of sheet material
JPH06281593A (ja) * 1993-03-25 1994-10-07 Kawasaki Steel Corp 表面検査方法及びその装置
JP3591160B2 (ja) * 1995-10-09 2004-11-17 Ｊｆｅスチール株式会社 表面検査装置
JPH09178667A (ja) * 1995-10-24 1997-07-11 Nkk Corp 表面検査装置
JP2002333310A (ja) * 2001-03-09 2002-11-22 Nippon Steel Corp 塗油量分布測定装置及び塗油量分布測定方法
DE102008050598A1 (de) 2007-10-09 2009-04-16 Kaushal, Christian, Dipl.-Ing. (FH) System zur Detektion von Medien auf Oberflächen
JP5104443B2 (ja) * 2008-03-21 2012-12-19 Ｊｆｅスチール株式会社 表面検査装置および方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111141755A (zh) * 2019-12-31 2020-05-12 国联汽车动力电池研究院有限责任公司 一种电池电芯内部缺陷的检测方法
CN111141755B (zh) * 2019-12-31 2022-11-11 国联汽车动力电池研究院有限责任公司 一种电池电芯内部缺陷的检测方法

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DE102017209062B4 (de) 2020-07-30
DE102017209062A1 (de) 2018-12-06

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