GB573182A - Improvements in or relating to the detection of faults in articles of non-magnetic material - Google Patents
Improvements in or relating to the detection of faults in articles of non-magnetic materialInfo
- Publication number
- GB573182A GB573182A GB8147/43A GB814743A GB573182A GB 573182 A GB573182 A GB 573182A GB 8147/43 A GB8147/43 A GB 8147/43A GB 814743 A GB814743 A GB 814743A GB 573182 A GB573182 A GB 573182A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- audio
- frequency
- telephones
- faults
- 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
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
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)
Abstract
573,182. Measuring physical qualities of materials. KING, A. J., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. May 21, 1943, No. 8147. [Class 37] Apparatus for the detection of faults in articles of non-ferrous electrically conducting material includes a scanning device which comprises an E-shaped magnetic core having on its central limb a coil B which is supplied with audio - frequency current from a suitable oscillator not shown. The outer limbs are provided with coils A, C which are of similar dimensions but are wound in opposite directions. Coils A and C are connected in series and to an audio-frequency responsive device such as a pair of telephones, not shown: In operation the device is moved over the surface of apiece of non-magnetic metal T and, provided the material is homogeneous, the eddy current pattern due to the coil B is symmetrical, thus causing equal and opposite voltages to be induced in coils A and C, so that no noise is heard in the telephones. If; however, the coils A and C are on opposite sides of a crack such as F, the eddy current pattern is disturbed and the audio-frequency note is heard in the telephones. Sensitivity is increased by tuning the coils A, B and C to the audio frequency. A visual detector such as a cathode ray oscillograph may be employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8147/43A GB573182A (en) | 1943-05-21 | 1943-05-21 | Improvements in or relating to the detection of faults in articles of non-magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8147/43A GB573182A (en) | 1943-05-21 | 1943-05-21 | Improvements in or relating to the detection of faults in articles of non-magnetic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB573182A true GB573182A (en) | 1945-11-09 |
Family
ID=9846650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8147/43A Expired GB573182A (en) | 1943-05-21 | 1943-05-21 | Improvements in or relating to the detection of faults in articles of non-magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB573182A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359486A (en) * | 1963-08-06 | 1967-12-19 | Bethlehem Steel Corp | Eddy current seam tracking device utillizing an e-shaped core with electromagnetically unequal pickup coils |
| US3535625A (en) * | 1968-04-22 | 1970-10-20 | Garrett Corp | Strain and flaw detector |
| US4445089A (en) * | 1978-08-21 | 1984-04-24 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Detection of surface cracks near a workpiece fastener hole by means of a rotatable probe |
| GB2186372A (en) * | 1986-02-03 | 1987-08-12 | Atomic Energy Authority Uk | Eddy current testing |
| WO2012086845A1 (en) * | 2010-12-21 | 2012-06-28 | Sintokogio, Ltd. | Surface property magnetic evaluation device and method |
| EP2846157A1 (en) * | 2013-09-06 | 2015-03-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Sensor assembly for the contactless and nondestructive characterization of specimens or components made of non-ferromagnetic materials |
| JPWO2013047521A1 (en) * | 2011-09-26 | 2015-03-26 | 株式会社東芝 | Eddy current flaw detector and eddy current flaw detection method |
| CN108982651A (en) * | 2018-08-09 | 2018-12-11 | 苏州热工研究院有限公司 | Exchange leakage field sensor based on ferromagnetic butt plates welding seam crack detection and the method using its progress crack detection |
| CN114689686A (en) * | 2022-03-14 | 2022-07-01 | 江苏师范大学 | A kind of slurry state detection probe, device and method based on pulse eddy current |
-
1943
- 1943-05-21 GB GB8147/43A patent/GB573182A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359486A (en) * | 1963-08-06 | 1967-12-19 | Bethlehem Steel Corp | Eddy current seam tracking device utillizing an e-shaped core with electromagnetically unequal pickup coils |
| US3535625A (en) * | 1968-04-22 | 1970-10-20 | Garrett Corp | Strain and flaw detector |
| US4445089A (en) * | 1978-08-21 | 1984-04-24 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Detection of surface cracks near a workpiece fastener hole by means of a rotatable probe |
| GB2186372A (en) * | 1986-02-03 | 1987-08-12 | Atomic Energy Authority Uk | Eddy current testing |
| WO2012086845A1 (en) * | 2010-12-21 | 2012-06-28 | Sintokogio, Ltd. | Surface property magnetic evaluation device and method |
| JPWO2013047521A1 (en) * | 2011-09-26 | 2015-03-26 | 株式会社東芝 | Eddy current flaw detector and eddy current flaw detection method |
| EP2762875A4 (en) * | 2011-09-26 | 2015-06-17 | Toshiba Kk | Eddy current flaw detector and eddy current flaw detection method |
| EP2846157A1 (en) * | 2013-09-06 | 2015-03-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Sensor assembly for the contactless and nondestructive characterization of specimens or components made of non-ferromagnetic materials |
| CN108982651A (en) * | 2018-08-09 | 2018-12-11 | 苏州热工研究院有限公司 | Exchange leakage field sensor based on ferromagnetic butt plates welding seam crack detection and the method using its progress crack detection |
| CN114689686A (en) * | 2022-03-14 | 2022-07-01 | 江苏师范大学 | A kind of slurry state detection probe, device and method based on pulse eddy current |
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