WO2001022075A3 - Apparatus and method for detecting cracks in metal articles - Google Patents

Apparatus and method for detecting cracks in metal articles Download PDF

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Publication number
WO2001022075A3
WO2001022075A3 PCT/GB2000/003657 GB0003657W WO0122075A3 WO 2001022075 A3 WO2001022075 A3 WO 2001022075A3 GB 0003657 W GB0003657 W GB 0003657W WO 0122075 A3 WO0122075 A3 WO 0122075A3
Authority
WO
WIPO (PCT)
Prior art keywords
probe
housing
self
eddy current
detecting cracks
Prior art date
Application number
PCT/GB2000/003657
Other languages
French (fr)
Other versions
WO2001022075A2 (en
Inventor
Steven Hughes
Michael K Bowling
Original Assignee
Apv Ltd
Steven Hughes
Michael K Bowling
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 Apv Ltd, Steven Hughes, Michael K Bowling filed Critical Apv Ltd
Priority to AU74359/00A priority Critical patent/AU7435900A/en
Publication of WO2001022075A2 publication Critical patent/WO2001022075A2/en
Publication of WO2001022075A3 publication Critical patent/WO2001022075A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013—Arrangements for scanning
    • G01N27/902—Arrangements for scanning by moving the sensors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

An apparatus suitable for use in detecting cracks or other discontinuities in metal articles includes a plurality of spaced-apart eddy current probes (4), each having a probe end (9) for contacting the article, supported by a common housing (6). Helical compression springs urge each probe (4) towards an extended position in which all the probe ends (9) lie outside the housing (6), and in which each probe end (9) is independently movable towards the housing (6) against the action of the springs (50). Each eddy current probe (4) forms at least part of an inductive load (84) of a respective, independent, self-oscillating circuit (80) which circuit (80) provides an output voltage (Vout) which varies with the oscillatory state of the self-oscillating circuit (80) being adjustable by an input voltage (Vin). This apparatus is particularly suitable for checking quickly and efficiently the large areas of metal that form large typical food processing vessels, such as milk holders and the like.
PCT/GB2000/003657 1999-09-23 2000-09-22 Apparatus and method for detecting cracks in metal articles WO2001022075A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74359/00A AU7435900A (en) 1999-09-23 2000-09-22 Apparatus and method for detecting cracks in metal articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9922426.3 1999-09-23
GBGB9922426.3A GB9922426D0 (en) 1999-09-23 1999-09-23 Apparatus and method for detecting cracks in metal articles

Publications (2)

Publication Number Publication Date
WO2001022075A2 WO2001022075A2 (en) 2001-03-29
WO2001022075A3 true WO2001022075A3 (en) 2001-11-15

Family

ID=10861394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/003657 WO2001022075A2 (en) 1999-09-23 2000-09-22 Apparatus and method for detecting cracks in metal articles

Country Status (3)

Country Link
AU (1) AU7435900A (en)
GB (1) GB9922426D0 (en)
WO (1) WO2001022075A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022138A1 (en) 2009-05-20 2010-11-25 Prüftechnik Dieter Busch AG Apparatus and method for inductive measurements
DE102009022136A1 (en) 2009-05-20 2010-11-25 Prüftechnik Dieter Busch AG Apparatus and method for inductive measurements

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105972A (en) * 1976-04-09 1978-08-08 British Gas Corporation Pipeline inspection vehicle for detecting defects in pipeline walls
US4387338A (en) * 1979-04-03 1983-06-07 Institut Dr. Friedrich Forster Prufgeratebau Method and apparatus for testing a metallic workpiece by inducing eddy currents therein
DE3410547A1 (en) * 1984-03-22 1985-09-26 Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen Test equipment for investigating electrically conductive test parts
DE3824948A1 (en) * 1988-07-22 1990-01-25 Fiz Energet I An Latvssr Eddy-current device for non-destructive testing
EP0577244A2 (en) * 1992-04-03 1994-01-05 General Electric Company A device for inspecting a component
EP0860698A2 (en) * 1997-02-21 1998-08-26 General Electric Company Hand-holdable eddy-current probe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105972A (en) * 1976-04-09 1978-08-08 British Gas Corporation Pipeline inspection vehicle for detecting defects in pipeline walls
US4387338A (en) * 1979-04-03 1983-06-07 Institut Dr. Friedrich Forster Prufgeratebau Method and apparatus for testing a metallic workpiece by inducing eddy currents therein
DE3410547A1 (en) * 1984-03-22 1985-09-26 Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen Test equipment for investigating electrically conductive test parts
DE3824948A1 (en) * 1988-07-22 1990-01-25 Fiz Energet I An Latvssr Eddy-current device for non-destructive testing
EP0577244A2 (en) * 1992-04-03 1994-01-05 General Electric Company A device for inspecting a component
EP0860698A2 (en) * 1997-02-21 1998-08-26 General Electric Company Hand-holdable eddy-current probe

Also Published As

Publication number Publication date
GB9922426D0 (en) 1999-11-24
AU7435900A (en) 2001-04-24
WO2001022075A2 (en) 2001-03-29

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