BE830751A - Detection de defauts superficiels dans de longs objets metalliques - Google Patents

Detection de defauts superficiels dans de longs objets metalliques

Info

Publication number
BE830751A
BE830751A BE157773A BE157773A BE830751A BE 830751 A BE830751 A BE 830751A BE 157773 A BE157773 A BE 157773A BE 157773 A BE157773 A BE 157773A BE 830751 A BE830751 A BE 830751A
Authority
BE
Belgium
Prior art keywords
detection
long metal
metal objects
superficial defects
superficial
Prior art date
Application number
BE157773A
Other languages
English (en)
French (fr)
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 filed Critical
Publication of BE830751A publication Critical patent/BE830751A/xx

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
    • G01N27/9046—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
    • G01N27/72—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

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)
BE157773A 1974-06-27 1975-06-27 Detection de defauts superficiels dans de longs objets metalliques BE830751A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2859774A GB1475517A (en) 1974-06-27 1974-06-27 Detection of surface defects in elongate metallic members

Publications (1)

Publication Number Publication Date
BE830751A true BE830751A (fr) 1975-10-16

Family

ID=10278129

Family Applications (1)

Application Number Title Priority Date Filing Date
BE157773A BE830751A (fr) 1974-06-27 1975-06-27 Detection de defauts superficiels dans de longs objets metalliques

Country Status (10)

Country Link
US (1) US3974442A (nl)
BE (1) BE830751A (nl)
CA (1) CA1019031A (nl)
DE (1) DE2528625C2 (nl)
FR (1) FR2276588A1 (nl)
GB (1) GB1475517A (nl)
IT (1) IT1036366B (nl)
NL (1) NL7507581A (nl)
SE (1) SE403188B (nl)
ZA (1) ZA754101B (nl)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850433A1 (de) * 1977-11-22 1979-05-23 British Steel Corp Vorrichtung zum auffinden von oberflaechenfehlern an werkstuecken
US4237419A (en) * 1978-06-07 1980-12-02 Tornbloms Kvalitetskontroll Ab Method and apparatus for non-destructive testing using a plurality of frequencies
DE2849235C3 (de) * 1978-11-13 1981-12-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Meßeinrichtung zur Eliminierung von auf Inhomogenitäten der Permeabilität und der elektrischen Leitfähigkeit zurückführenden Störeffekten bei der Schwingungsmessung an einem rotierenden, schwingenden Element
US4383218A (en) * 1978-12-29 1983-05-10 The Boeing Company Eddy current flow detection including compensation for system variables such as lift-off
JPS55129749A (en) * 1979-03-28 1980-10-07 Sumitomo Metal Ind Ltd Sensitivity correction method for electromagnetic ultrasonic wave probe
GB2068558B (en) * 1980-01-29 1983-07-27 British Steel Corp Billet surface inspection system
GB2069699B (en) * 1980-02-14 1983-10-12 British Steel Corp Surface inspection equipment
DE3005915C2 (de) * 1980-02-16 1985-01-10 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Wirbelstromprüfgerät für Oberflächenfehler
FR2502337A1 (fr) * 1981-03-23 1982-09-24 Commissariat Energie Atomique Procede de controle non destructif par courants de foucault avec correction des effets d'entrefer et dispositif de mise en oeuvre
SE456043B (sv) * 1984-02-10 1988-08-29 Bengt Hjalmar Tornblom Sett och anordning for provning och/eller metning av elektriskt ledande provobjekt med avseende pa forendringar
IT1177991B (it) * 1984-09-25 1987-09-03 Centro Speriment Metallurg Sonda industriale di tipo differenziale ad una sola bobina per il controllo non distruttivo di prodotti siderurgici
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
US4688580A (en) * 1985-07-11 1987-08-25 The Johns Hopkins University Non-invasive electromagnetic technique for monitoring bone healing and bone fracture localization
JPS62299755A (ja) * 1986-06-20 1987-12-26 Nitto Gurasufuaibaa Kogyo Kk ガラス繊維中の導電性物質の検出方法及び検出装置
SE456606B (sv) * 1987-02-18 1988-10-17 Tornbloms Kvalitetskontroll Ab Anordning for metning och/eller provning av dimension och/eller form via avstandsmetning
US4875007A (en) * 1988-02-17 1989-10-17 The Indikon Company, Inc. Eddy current proximity system
ZA90813B (en) * 1989-03-29 1991-03-27 Boc Group Inc Method of reducing the oxygen concentration in a psa nitrogen product stream
FR2667158B1 (fr) * 1990-09-21 1993-01-22 Thomson Csf Dispositif de traitement d'un signal provenant d'un capteur ayant une reponse du type derivatif.
US5544953A (en) * 1994-05-18 1996-08-13 General Electric Co. Rolling-ball thermoelectric potential probe and housing for nondestructive testing of metallic and semiconductor objects
DE19954968C2 (de) * 1999-11-16 2001-09-20 Bosch Gmbh Robert Anordnung zur Bestimmung der Eigenschaften magnetoresistiver Prüflinge
CN107632064B (zh) * 2017-08-25 2021-12-21 爱德森（厦门）电子有限公司 一种涡流检测干扰信号抑制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744233A (en) * 1952-05-26 1956-05-01 Associated Spring Corp Apparatus for detecting flaws in metal stock
US2985824A (en) * 1958-04-14 1961-05-23 Jr Claus J Renken Nondestructive eddy current testing
US3358225A (en) * 1964-03-27 1967-12-12 Richard S Peugeot Lift-off compensation for eddy current testers
GB1318346A (en) * 1969-09-12 1973-05-31 Owston C N High-frequency eddy-current non-destructuve testing apparatus
US3611120A (en) * 1970-02-24 1971-10-05 Forster F M O Eddy current testing systems with means to compensate for probe to workpiece spacing

Also Published As

Publication number Publication date
US3974442A (en) 1976-08-10
FR2276588A1 (fr) 1976-01-23
GB1475517A (en) 1977-06-01
ZA754101B (en) 1976-06-30
CA1019031A (en) 1977-10-11
NL7507581A (nl) 1975-12-30
DE2528625A1 (de) 1976-01-15
IT1036366B (it) 1979-10-30
SE7507332L (sv) 1975-12-29
FR2276588B1 (nl) 1981-06-12
SE403188B (sv) 1978-07-31
DE2528625C2 (de) 1987-01-15

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: BRITISH STEEL CORP.

Effective date: 19840627