CA2258623C - Technique d'inspection de courant de foucault - Google Patents
Technique d'inspection de courant de foucault Download PDFInfo
- Publication number
- CA2258623C CA2258623C CA002258623A CA2258623A CA2258623C CA 2258623 C CA2258623 C CA 2258623C CA 002258623 A CA002258623 A CA 002258623A CA 2258623 A CA2258623 A CA 2258623A CA 2258623 C CA2258623 C CA 2258623C
- Authority
- CA
- Canada
- Prior art keywords
- wall
- coils
- emitters
- electromagnetic field
- receiver
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000007689 inspection Methods 0.000 title claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 230000001939 inductive effect Effects 0.000 claims description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000011088 calibration curve Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- 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
- G01N27/904—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 with two or more sensors
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Electrochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
L'invention concerne un appareil (9) destiné à inspecter un objet (2) fabriqué dans une matière conductrice; l'appareil comprend un convertisseur de signaux non statiques permettant de générer un champ électromagnétique dans l'objet (2) ainsi qu'un récepteur (20, 21) permettant de mesurer les variations du courant de Foucault généré par le champ électromagnétique non statique et d'émettre un signal représentant l'amortissement du courant de Foucault, dans lequel le convertisseur de signaux non statiques comprend au moins deux émetteurs (11, 12) espacés latéralement destinés à l'émission d'un champ électromagnétique; ces émetteurs (11, 12) sont si excités pendant un fonctionnement normal, que le champ électromagnétique qui en résulte dans la zone centrale (26), entre les émetteurs (11, 12), est intensifié.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96201978 | 1996-07-12 | ||
| EP96201978.2 | 1996-07-12 | ||
| PCT/EP1997/003815 WO1998002714A1 (fr) | 1996-07-12 | 1997-07-11 | Technique d'inspection de courant de foucault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2258623A1 CA2258623A1 (fr) | 1998-01-22 |
| CA2258623C true CA2258623C (fr) | 2006-08-22 |
Family
ID=36940304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002258623A Expired - Fee Related CA2258623C (fr) | 1996-07-12 | 1997-07-11 | Technique d'inspection de courant de foucault |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2258623C (fr) |
-
1997
- 1997-07-11 CA CA002258623A patent/CA2258623C/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2258623A1 (fr) | 1998-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170711 |
|
| MKLA | Lapsed |
Effective date: 20170711 |
|
| MKLA | Lapsed |
Effective date: 20170711 |