GB2041535A - A measuring and/or testing device - Google Patents

A measuring and/or testing device Download PDF

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Publication number
GB2041535A
GB2041535A GB7944375A GB7944375A GB2041535A GB 2041535 A GB2041535 A GB 2041535A GB 7944375 A GB7944375 A GB 7944375A GB 7944375 A GB7944375 A GB 7944375A GB 2041535 A GB2041535 A GB 2041535A
Authority
GB
United Kingdom
Prior art keywords
signal
fact
transmitter
compensation
suppressed
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Withdrawn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
GB7944375A
Other languages
English (en)
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.)
TOERNBLOMS KVALITETSKONTROLL
Original Assignee
TOERNBLOMS KVALITETSKONTROLL
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 TOERNBLOMS KVALITETSKONTROLL filed Critical TOERNBLOMS KVALITETSKONTROLL
Publication of GB2041535A publication Critical patent/GB2041535A/en
Withdrawn legal-status Critical Current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
    • 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
    • G01N27/9046—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 by analysing electrical signals
    • G01N27/9053—Compensating for probe to workpiece spacing
    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil

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)
GB7944375A 1978-12-28 1979-12-24 A measuring and/or testing device Withdrawn GB2041535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7813344A SE7813344L (sv) 1978-12-28 1978-12-28 Met- och/eller kompensationsanordning

Publications (1)

Publication Number Publication Date
GB2041535A true GB2041535A (en) 1980-09-10

Family

ID=20336705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7944375A Withdrawn GB2041535A (en) 1978-12-28 1979-12-24 A measuring and/or testing device

Country Status (3)

Country Link
DE (1) DE2952129A1 (sv)
GB (1) GB2041535A (sv)
SE (1) SE7813344L (sv)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152066A2 (de) * 1984-02-10 1985-08-21 Törnbloms Kvalitetskontroll Ab Verfahren und Durchführungsanordnung zum Prüfen und/oder Messen elektrisch leitender Prüfgegenstände
GB2165650A (en) * 1984-04-09 1986-04-16 Dennis Amerena Parker Method and apparatus for the quantative and qualitative measurement of small metal particles
GB2192064A (en) * 1986-06-17 1987-12-31 Michael John Nicholas Electromagnetic non-destructive sensing/inspection device incorporating a balancing network
US4851774A (en) * 1986-07-15 1989-07-25 Tornbloms Kvalitetskontroll Ab Suppression of the effect of harmless surface defects in eddy current testing by sensitivity characteristic compensation
US4945307A (en) * 1982-11-24 1990-07-31 Tornbloms Kvalitetskontroll Ab Electronic device for detecting irregularities in a surface of a solid object
FR2712975A1 (fr) * 1993-11-23 1995-06-02 Framatome Sa Procédé de contrôle non destructif d'un tube mince par courants de Foucault et capteur à courants de Foucault.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318617A (en) * 1979-12-14 1982-03-09 Keuffel & Esser Company DC Shift error correction for electro-optical measuring system
DE3129321C2 (de) * 1981-07-24 1986-11-06 Rižskij politechničeskij institut, Riga Verfahren und Einrichtung zur zerstörungsfreien Kontrolle von Punktschweißverbindungen
DE3517114A1 (de) * 1985-05-11 1986-11-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Wirbelstromverfahren zur untersuchung der spannungsrisskorrosion in austenitischen bauteilen sowie vorrichtung zur durchfuehrung des verfahrens
DE4322987C2 (de) * 1993-07-09 1997-04-10 Erwin Halstrup Spule zur Erzeugung eines magnetischen Wechselfeldes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945307A (en) * 1982-11-24 1990-07-31 Tornbloms Kvalitetskontroll Ab Electronic device for detecting irregularities in a surface of a solid object
EP0152066A2 (de) * 1984-02-10 1985-08-21 Törnbloms Kvalitetskontroll Ab Verfahren und Durchführungsanordnung zum Prüfen und/oder Messen elektrisch leitender Prüfgegenstände
JPS60187859A (ja) * 1984-02-10 1985-09-25 トールンブロムス　クバリテツトスコントロールアクチーボラグ 導電供試体の試験及び／もしくは測定方法及び装置
US4661777A (en) * 1984-02-10 1987-04-28 Tornbloms Kvalitetskontroll Ab Plural frequency eddy current method and apparatus with lift-off compensation for detecting faults in electrically conductive objects
EP0152066A3 (en) * 1984-02-10 1988-08-31 Tornbloms Kvalitetskontroll Ab Method and system for testing and/or measuring electrically conductive test objects
GB2165650A (en) * 1984-04-09 1986-04-16 Dennis Amerena Parker Method and apparatus for the quantative and qualitative measurement of small metal particles
GB2192064A (en) * 1986-06-17 1987-12-31 Michael John Nicholas Electromagnetic non-destructive sensing/inspection device incorporating a balancing network
GB2192064B (en) * 1986-06-17 1990-10-31 Michael John Nicholas Balanced bridge sensing device
US4851774A (en) * 1986-07-15 1989-07-25 Tornbloms Kvalitetskontroll Ab Suppression of the effect of harmless surface defects in eddy current testing by sensitivity characteristic compensation
FR2712975A1 (fr) * 1993-11-23 1995-06-02 Framatome Sa Procédé de contrôle non destructif d'un tube mince par courants de Foucault et capteur à courants de Foucault.

Also Published As

Publication number Publication date
DE2952129A1 (de) 1980-07-10
SE7813344L (sv) 1980-06-29

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)