CA1194548A - Method and instrument for testing materials after the eddy current principle - Google Patents
Method and instrument for testing materials after the eddy current principleInfo
- Publication number
- CA1194548A CA1194548A CA000405838A CA405838A CA1194548A CA 1194548 A CA1194548 A CA 1194548A CA 000405838 A CA000405838 A CA 000405838A CA 405838 A CA405838 A CA 405838A CA 1194548 A CA1194548 A CA 1194548A
- Authority
- CA
- Canada
- Prior art keywords
- coil
- signals
- output
- instrument according
- compensating
- 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
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 239000000306 component Substances 0.000 claims description 35
- 239000013598 vector Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 230000005291 magnetic effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 abstract description 15
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 description 10
- 238000003199 nucleic acid amplification method Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 4
- 239000000700 radioactive tracer Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002311 subsequent effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001702 transmitter Effects 0.000 description 1
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
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813125732 DE3125732A1 (de) | 1981-06-30 | 1981-06-30 | Verfahren und vorrichtung zur werkstoffpruefung nach dem wirbelstromprinzip |
| DEP3125732.1 | 1981-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1194548A true CA1194548A (en) | 1985-10-01 |
Family
ID=6135748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405838A Expired CA1194548A (en) | 1981-06-30 | 1982-06-23 | Method and instrument for testing materials after the eddy current principle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4564809A (enExample) |
| EP (1) | EP0068503B1 (enExample) |
| JP (1) | JPS5832157A (enExample) |
| CA (1) | CA1194548A (enExample) |
| DE (1) | DE3125732A1 (enExample) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3207569C2 (de) * | 1982-03-03 | 1986-05-28 | Herbert 8553 Ebermannstadt Baumgartner | Prüfgerät zur zerstörungsfreien Werkstoffprüfung |
| DE3213267A1 (de) * | 1982-04-08 | 1983-10-20 | Nukem Gmbh, 6450 Hanau | Verfahren und vorrichtung zur pruefung von werkstoffen nach dem wirbelstromprinzip |
| US4709213A (en) * | 1982-07-23 | 1987-11-24 | Garrett Electronics, Inc. | Metal detector having digital signal processing |
| DE3313820A1 (de) * | 1983-04-16 | 1984-10-18 | Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen | Einrichtung zum pruefen der oberflaeche eines metallischen pruefteiles |
| GB2140564B (en) * | 1983-05-23 | 1986-10-22 | Central Electr Generat Board | Cable corrosion monitor |
| DE3525376A1 (de) * | 1985-07-16 | 1987-01-29 | Nukem Gmbh | Verfahren und vorrichtung zur zerstoerungsfreien pruefung von ferromagnetischen koerpern mit oberflaechenabschnitten, die an kanten und/oder ecken aneinandergrenzen |
| SE456864B (sv) * | 1986-08-27 | 1988-11-07 | Toernbloms Kvalitetskontroll | Anordning foer att vid virvelstroemsprovning av omagnetiska provobjekt detektera och undertrycka inverkan av stoerande magnetiska omraaden |
| DE3720686A1 (de) * | 1987-06-23 | 1989-01-05 | Foerster Inst Dr Friedrich | Verfahren zum untersuchen eines objektes |
| US5055784A (en) * | 1987-12-07 | 1991-10-08 | American Research Corporation Of Virginia | Bridgeless system for directly measuring complex impedance of an eddy current probe |
| CA2088918C (en) * | 1991-06-04 | 1996-07-02 | Seigo Ando | Magnetic detecting method and apparatus therefor |
| DE10229735A1 (de) * | 2002-07-02 | 2004-01-22 | rinas Gerätetechnik GmbH | Verfahren zum Erkennen und Lokalisieren von Materialfehlern |
| US9465008B2 (en) | 2014-06-13 | 2016-10-11 | General Electric Company | Method and system for eddy current device dynamic gain adjustment |
| CN108964811A (zh) * | 2018-06-07 | 2018-12-07 | 珠海格力电器股份有限公司 | 一种应变测试系统及方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194149A (en) * | 1977-12-15 | 1980-03-18 | The Babcock & Wilcox Company | Method for generating the eddy current signature of a flaw in a tube proximate a contiguous member which obscures the flaw signal |
| DE2814125C2 (de) * | 1978-04-01 | 1986-03-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Vorrichtung zur zerstörungsfreien Werkstoffprüfung |
| US4237419A (en) * | 1978-06-07 | 1980-12-02 | Tornbloms Kvalitetskontroll Ab | Method and apparatus for non-destructive testing using a plurality of frequencies |
| DE2825958C2 (de) * | 1978-06-14 | 1986-02-20 | Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen | Magnetisches oder magnetinduktives Werkstoffprüfgerät mit Nullpunktkompensationseinrichtung |
| FR2443682A1 (fr) * | 1978-12-07 | 1980-07-04 | Commissariat Energie Atomique | Circuit de correction automatique d'un signal emis par un capteur differentiel desequilibre |
| FR2451032A1 (fr) * | 1979-03-09 | 1980-10-03 | Commissariat Energie Atomique | Appareil numerique pour le controle de pieces par courants de foucault |
| US4303885A (en) * | 1979-06-18 | 1981-12-01 | Electric Power Research Institute, Inc. | Digitally controlled multifrequency eddy current test apparatus and method |
-
1981
- 1981-06-30 DE DE19813125732 patent/DE3125732A1/de active Granted
-
1982
- 1982-06-22 US US06/390,964 patent/US4564809A/en not_active Expired - Fee Related
- 1982-06-23 CA CA000405838A patent/CA1194548A/en not_active Expired
- 1982-06-30 JP JP57111867A patent/JPS5832157A/ja active Pending
- 1982-06-30 EP EP82105819A patent/EP0068503B1/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0068503B1 (de) | 1987-03-25 |
| EP0068503A2 (de) | 1983-01-05 |
| DE3125732A1 (de) | 1983-01-13 |
| US4564809A (en) | 1986-01-14 |
| DE3125732C2 (enExample) | 1988-09-01 |
| EP0068503A3 (en) | 1983-10-05 |
| JPS5832157A (ja) | 1983-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |