NO914574L - Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne - Google Patents

Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne

Info

Publication number
NO914574L
NO914574L NO91914574A NO914574A NO914574L NO 914574 L NO914574 L NO 914574L NO 91914574 A NO91914574 A NO 91914574A NO 914574 A NO914574 A NO 914574A NO 914574 L NO914574 L NO 914574L
Authority
NO
Norway
Prior art keywords
metal blank
detected
pin holes
light source
blanks
Prior art date
Application number
NO91914574A
Other languages
English (en)
Other versions
NO914574D0 (no
Inventor
Karl Otto Bjoernestoel
Jan Tore Malmo
Yngve Stroem
Eiolf Vikhagen
Original Assignee
Elkem Technology
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 Elkem Technology filed Critical Elkem Technology
Priority to NO91914574A priority Critical patent/NO914574L/no
Publication of NO914574D0 publication Critical patent/NO914574D0/no
Priority to JP4297189A priority patent/JPH05232044A/ja
Priority to KR1019920021750A priority patent/KR930009681A/ko
Priority to US07/979,616 priority patent/US5363901A/en
Priority to CA002083449A priority patent/CA2083449A1/en
Priority to EP92310658A priority patent/EP0543677A1/en
Priority to TW081110323A priority patent/TW224435B/zh
Publication of NO914574L publication Critical patent/NO914574L/no

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
    • 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
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/894—Pinholes
    • 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
    • G01N2021/8887—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 based on image processing techniques
    • G01N2021/889—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 based on image processing techniques providing a bare video image, i.e. without visual measurement aids

Landscapes

  • 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)
  • Continuous Casting (AREA)

Abstract

Fremgangsmåte for detektering av pin-hull i strengstøpte metallemner, særlig strengstøpte stål- og aluminiumemner. Strengstøpte metallemner transporteres kontinuerlig forbi en symmetrisk lyskilde bestående av et flertall enkeltlyskilder anordnet i sirkel eller på annen måte slik at lyset faller tilnærmet symmetrisk inn på den del av overflaten av metallemnet som skal detekteres, slik at overflaten av den del av det strengstøpte metallemne som vender mot lyskilden opplyses, mens pin-hull vil forbli uopplyst. Reflektert lys fra overflaten av det strengstøpte metallemne detekteres ved hjelp av et linjescankamera anordnet sentralt i forhold til lyskilden og som har en scanningsretning vinkelrett på bevegelsesretningen for metallemnet. Pin-hull i metallemnet detekteres ved registrering av en reflektert lysintensitet under en valgt terskel verdi.
NO91914574A 1991-11-22 1991-11-22 Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne NO914574L (no)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NO91914574A NO914574L (no) 1991-11-22 1991-11-22 Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne
JP4297189A JPH05232044A (ja) 1991-11-22 1992-11-06 連続鋳造金属ビレットのピンホールを検出する方法
KR1019920021750A KR930009681A (ko) 1991-11-22 1992-11-19 연속적으로 주조한 강편에 존재하는 핀호울을 탐지하기 위한 방법
US07/979,616 US5363901A (en) 1991-11-22 1992-11-19 Method for detecting pinholes in continuously cast billets
CA002083449A CA2083449A1 (en) 1991-11-22 1992-11-20 Method for detecting pinholes in continuously cast billets
EP92310658A EP0543677A1 (en) 1991-11-22 1992-11-23 Method for detecting pinholes in continuously cast billets
TW081110323A TW224435B (no) 1991-11-22 1992-12-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO91914574A NO914574L (no) 1991-11-22 1991-11-22 Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne

Publications (2)

Publication Number Publication Date
NO914574D0 NO914574D0 (no) 1991-11-22
NO914574L true NO914574L (no) 1993-05-24

Family

ID=19894618

Family Applications (1)

Application Number Title Priority Date Filing Date
NO91914574A NO914574L (no) 1991-11-22 1991-11-22 Fremgangsmaate for detektering av pin-hull i strengestoeptemetallemne

Country Status (7)

Country Link
US (1) US5363901A (no)
EP (1) EP0543677A1 (no)
JP (1) JPH05232044A (no)
KR (1) KR930009681A (no)
CA (1) CA2083449A1 (no)
NO (1) NO914574L (no)
TW (1) TW224435B (no)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5920735A (en) * 1997-01-16 1999-07-06 Gelphman; Janet L. Method and apparatus to observe the geometry of relative motion
US7460703B2 (en) * 2002-12-03 2008-12-02 Og Technologies, Inc. Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar
US7324681B2 (en) 2002-12-03 2008-01-29 Og Technologies, Inc. Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar
US6950546B2 (en) 2002-12-03 2005-09-27 Og Technologies, Inc. Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar
EA009650B1 (ru) * 2004-09-21 2008-02-28 Асахи Касеи Кемикалз Корпорейшн Промышленный способ выделения побочно полученного спирта
KR100891842B1 (ko) * 2007-08-28 2009-04-07 주식회사 포스코 원형 선재 광학결함 검출장치 및 방법
JP6136892B2 (ja) * 2013-11-27 2017-05-31 トヨタ自動車株式会社 引上式連続鋳造装置及び引上式連続鋳造方法
DE102014011268A1 (de) * 2014-07-29 2016-02-04 Brückner Maschinenbau GmbH & Co. KG Optische Fehlstellendetektion

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US2758712A (en) * 1952-08-18 1956-08-14 Linderman Engineering Company Detecting apparatus
NL282725A (no) * 1961-09-05
US3715476A (en) * 1969-01-16 1973-02-06 Nippon Steel Corp Method and apparatus for detecting pinholes on sheet articles
US3781117A (en) * 1972-03-31 1973-12-25 United States Steel Corp Apparatus for surface inspection of moving material
US3795452A (en) * 1973-02-28 1974-03-05 Us Air Force Instrument for automatically inspecting integrated circuit masks for pinholes and spots
US4028728A (en) * 1976-04-02 1977-06-07 Western Electric Company, Inc. Method of and video system for identifying different light-reflective surface areas on articles
IS1093B6 (is) * 1976-12-10 1982-09-24 Ashimori Kogyo Kabushiki Kaisha, (Ashimori Industry Co., Ltd.) Ný gerð af korklínu og aðferð til að búa hana til
GB2019009B (en) * 1978-03-23 1982-11-17 Futec Inc Method of imaging the surface of a continuous cast hot metal strip for detection of scarfs appearing thereon and apparatus for the same
US4223346A (en) * 1979-04-05 1980-09-16 Armco Inc. Automatic defect detecting inspection apparatus
JPS57132042A (en) * 1981-02-09 1982-08-16 Fuji Electric Co Ltd Inspecting method of defect on surface of article
DE3113120C1 (de) * 1981-03-27 1982-09-30 Mannesmann AG, 4000 Düsseldorf Vorrichtung zur Inspektion von Gussstraengen in einer Stranggiessanlage
JPS5892938A (ja) * 1981-11-30 1983-06-02 Matsushita Electric Ind Co Ltd 傷測定装置
DE3200007A1 (de) * 1982-01-02 1983-07-14 Klöckner-Werke AG, 4100 Duisburg Verfahren und vorrichtung zum pruefen von metallischen proben fuer die spektralanalytische untersuchung
CH656466A5 (de) * 1982-02-15 1986-06-30 Alusuisse Verfahren und vorrichtung zur oberflaechenkontrolle eines werkstoffes.
FR2528740A1 (fr) * 1982-06-18 1983-12-23 Clesid Sa Dispositif de controle de la coulee continue de l'acier
JPS60146134A (ja) * 1984-01-11 1985-08-01 Matsushita Electric Ind Co Ltd 表面疵検出用照明装置
CA1229392A (en) * 1984-02-28 1987-11-17 Hirosato Yamane Method and apparatus for detection of surface defects of hot metal body
JPH0676960B2 (ja) * 1984-12-12 1994-09-28 株式会社日立製作所 繰返し荷重を受ける機械構造物の余寿命評価方法およびその装置
JPS6330164A (ja) * 1986-07-22 1988-02-08 Kubota Ltd 連続鋳造における鋳造欠陥の検出方法
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Also Published As

Publication number Publication date
EP0543677A1 (en) 1993-05-26
KR930009681A (ko) 1993-06-21
CA2083449A1 (en) 1993-05-23
TW224435B (no) 1994-06-01
US5363901A (en) 1994-11-15
JPH05232044A (ja) 1993-09-07
NO914574D0 (no) 1991-11-22

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