WO2003091722A3 - Dispositif de detection de defaut - Google Patents

Dispositif de detection de defaut Download PDF

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Publication number
WO2003091722A3
WO2003091722A3 PCT/GB2003/001740 GB0301740W WO03091722A3 WO 2003091722 A3 WO2003091722 A3 WO 2003091722A3 GB 0301740 W GB0301740 W GB 0301740W WO 03091722 A3 WO03091722 A3 WO 03091722A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
excitation
column
probe
filtering
Prior art date
Application number
PCT/GB2003/001740
Other languages
English (en)
Other versions
WO2003091722A2 (fr
Inventor
Alan Hobbs
Robert Cooke
Alex Barrett
Original Assignee
Networksuk Ltd
Alan Hobbs
Robert Cooke
Alex Barrett
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 Networksuk Ltd, Alan Hobbs, Robert Cooke, Alex Barrett filed Critical Networksuk Ltd
Priority to AU2003226564A priority Critical patent/AU2003226564A1/en
Priority to EP03747170A priority patent/EP1497641A2/fr
Priority to GB0407346A priority patent/GB2398388B/en
Publication of WO2003091722A2 publication Critical patent/WO2003091722A2/fr
Publication of WO2003091722A3 publication Critical patent/WO2003091722A3/fr

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
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

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  • 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

L'invention concerne un dispositif de détection de défaut fonctionnant selon le principe des courants de Foucault et utilisant une bobine d'excitation placée autour de la colonne pour générer un champ magnétique produisant les courants de Foucault ainsi qu'une sonde placée à l'intérieur de la colonne pour détecter les champs magnétiques résultant des courants de Foucault. Une unité de génération et de traitement de signal est connectée à l'unité d'excitation et à la sonde de sorte à produire un signal de commande pour l'unité d'excitation et à traiter un signal produit en sortie par le capteur. L'unité de génération et de traitement de signal comprend une unité de filtrage destinée à filtrer l'harmonique et le bruit présents dans le signal de sortie du capteur sans introduction concomitante d'un retard de phase significatif dans ledit signal de sortie du capteur. Ce dispositif utilise de préférence un amplificateur à hacheur pour réaliser le filtrage, le hacheur étant sondé en fonction du signal d'excitation, un circuit de verrouillage assurant le maintien du signal de sonde à 90° derrière le signal d'excitation, lequel est avantageusement une onde carrée. Ensuite, l'utilisation d'un nouveau signal de sonde à 90° derrière le signal de sonde existant permet une détection rapide de la différence de phase entre le signal d'excitation et le signal de sortie de la sonde, cette différence de phase étant utilisée pour commander, par exemple, un compteur fournissant une indication du degré de défaut dans la colonne.
PCT/GB2003/001740 2002-04-24 2003-04-23 Dispositif de detection de defaut WO2003091722A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003226564A AU2003226564A1 (en) 2002-04-24 2003-04-23 Defect detection device
EP03747170A EP1497641A2 (fr) 2002-04-24 2003-04-23 Dispositif de detection de defaut
GB0407346A GB2398388B (en) 2002-04-24 2003-04-23 Defect detection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0209333.4 2002-04-24
GBGB0209333.4A GB0209333D0 (en) 2002-04-24 2002-04-24 Defect detection device

Publications (2)

Publication Number Publication Date
WO2003091722A2 WO2003091722A2 (fr) 2003-11-06
WO2003091722A3 true WO2003091722A3 (fr) 2004-02-19

Family

ID=9935394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/001740 WO2003091722A2 (fr) 2002-04-24 2003-04-23 Dispositif de detection de defaut

Country Status (4)

Country Link
EP (1) EP1497641A2 (fr)
AU (1) AU2003226564A1 (fr)
GB (2) GB0209333D0 (fr)
WO (1) WO2003091722A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007155733A (ja) * 2005-12-06 2007-06-21 Southwest Research Inst 位相比較を用いる長距離導波検査における欠陥部信号からの溶接部信号の自動区別方法
CN115236145B (zh) * 2022-09-21 2022-12-09 中国石油大学(华东) 一种评估玻璃纤维增强材料基体固化状态的装置和方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2124579A (en) * 1937-01-30 1938-07-26 Steel And Tubes Inc Method of and apparatus for testing metallic articles
US4144494A (en) * 1976-09-10 1979-03-13 Mannesmann Aktiengesellschaft Method of magnetically testing tubes during welding wherein the same magnetic field is used both for heating and testing
US4368429A (en) * 1980-05-15 1983-01-11 Combustion Engineering, Inc. Method and apparatus for suppressing noise during nondestructive eddy current testing
EP0271670A1 (fr) * 1986-11-14 1988-06-22 Kernforschungszentrum Karlsruhe Gmbh Procédé pour la détection de la corrosion ou similaire
USH879H (en) * 1989-06-30 1991-01-01 The United States Of America As Represented By The Secretary Of The Navy Method and device for inspecting circumferentially conducting materials
WO1996034279A1 (fr) * 1995-04-24 1996-10-31 Larsson Goeran Procede et appareil de mesure d'objets ferromagnetiques
EP0806660A1 (fr) * 1996-05-05 1997-11-12 Roland Thom Procédé et dispositif de contrÔle de la corrosion sur la surface d'un mât d'éclairage
EP1209463A2 (fr) * 2000-11-27 2002-05-29 Dinsley Devices Limited Détecter la corrosion des candélabres d'éclairage par technique de courant de Foucault

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2124579A (en) * 1937-01-30 1938-07-26 Steel And Tubes Inc Method of and apparatus for testing metallic articles
US4144494A (en) * 1976-09-10 1979-03-13 Mannesmann Aktiengesellschaft Method of magnetically testing tubes during welding wherein the same magnetic field is used both for heating and testing
US4368429A (en) * 1980-05-15 1983-01-11 Combustion Engineering, Inc. Method and apparatus for suppressing noise during nondestructive eddy current testing
EP0271670A1 (fr) * 1986-11-14 1988-06-22 Kernforschungszentrum Karlsruhe Gmbh Procédé pour la détection de la corrosion ou similaire
USH879H (en) * 1989-06-30 1991-01-01 The United States Of America As Represented By The Secretary Of The Navy Method and device for inspecting circumferentially conducting materials
WO1996034279A1 (fr) * 1995-04-24 1996-10-31 Larsson Goeran Procede et appareil de mesure d'objets ferromagnetiques
EP0806660A1 (fr) * 1996-05-05 1997-11-12 Roland Thom Procédé et dispositif de contrÔle de la corrosion sur la surface d'un mât d'éclairage
EP1209463A2 (fr) * 2000-11-27 2002-05-29 Dinsley Devices Limited Détecter la corrosion des candélabres d'éclairage par technique de courant de Foucault

Also Published As

Publication number Publication date
AU2003226564A1 (en) 2003-11-10
EP1497641A2 (fr) 2005-01-19
GB0407346D0 (en) 2004-05-05
GB0209333D0 (en) 2002-06-05
GB2398388B (en) 2005-01-12
GB2398388A (en) 2004-08-18
WO2003091722A2 (fr) 2003-11-06

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