GB1288188A - - Google Patents
Info
- Publication number
- GB1288188A GB1288188A GB1288188DA GB1288188A GB 1288188 A GB1288188 A GB 1288188A GB 1288188D A GB1288188D A GB 1288188DA GB 1288188 A GB1288188 A GB 1288188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- coil
- tubes
- amplitude
- terminals
- 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
- G01N27/9013—Arrangements for scanning
- G01N27/9026—Arrangements for scanning by moving the material
Abstract
1288188 Electromagnetic flaw detectors ELEKTROSTALSKY ZAVOD TYAZHELOGO MASHINGSTROENIA 23 March 1971 7794/71 Heading G1N [Also in Division H1] A flaw detector for rolled products and welded tubes includes a pass-through type transducer 6 provided with three individually mounted coaxial coils 3, 4 and 5, coil 3 being connected as an inductor and coils 4, 5 connected differentially. The coils are each a rigid split ring arranged in grooves C, D of two superposed coaxial dielectric ring shaped discs 7, 8 interlinked by four current carrying contact bushes 11, 12, 13, 14 connected, 11, 12 to terminals 15, 16 of the coil 3 and 13, 14 to terminals 17, 18 of the differentially connected coils 4, 5. Discs 7, 8 are mounted in the apparatus by means of contact pins passed through and in electrical contact with the bushes 11, 12, 13, 14, Fig.2 (not shown). A slot B is provided in the lower part of the frame for passing the scale, water and emulsion falling from the rolled products or tubes. In operation the products or tubes are magnetized as they pass through the transducer 6 by means of a D.C. energized coil surrounding the apparatus, Fig.2 (not shown) and coil 3 is energized by an audio frequency signal from a generator Fig.7 (not shown). The output signals from coils 4, 5 modulated by the audio frequency signal and the phase and amplitude of which depend upon the flaws present are fed to an amplitude and phase discriminator and amplified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB779471 | 1971-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1288188A true GB1288188A (en) | 1972-09-06 |
Family
ID=9839872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1288188D Expired GB1288188A (en) | 1971-03-23 | 1971-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1288188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475083A (en) * | 1977-09-19 | 1984-10-02 | Studsvik Energiteknik Ab | Method and apparatus for electromagnetically measuring parameters of electrically conductive high temperature materials |
-
1971
- 1971-03-23 GB GB1288188D patent/GB1288188A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475083A (en) * | 1977-09-19 | 1984-10-02 | Studsvik Energiteknik Ab | Method and apparatus for electromagnetically measuring parameters of electrically conductive high temperature materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |