JPS5550156A - Eddy current loating method and device - Google Patents
Eddy current loating method and deviceInfo
- Publication number
- JPS5550156A JPS5550156A JP12291678A JP12291678A JPS5550156A JP S5550156 A JPS5550156 A JP S5550156A JP 12291678 A JP12291678 A JP 12291678A JP 12291678 A JP12291678 A JP 12291678A JP S5550156 A JPS5550156 A JP S5550156A
- Authority
- JP
- Japan
- Prior art keywords
- coils
- degrees
- outputs
- tested
- fed
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE: To make it possible to detect the axially elongated flaw at a high speed by providing a plurality of locating coils, which are eccentric from the axis of a rod- shaped metal to be tested, and by detecting the signal differences between the respective coils.
CONSTITUTION: There are arranged around a material 1 to be tested three locating coils 6W8 which are spaced at a distance l in the axial direction with eccentricity of 120 degrees from one another. These coils 6W8 generate signals SA, SB and SC for the regions AWC which are divided from the surface of the material 1 by 120 degrees. Two of those signals are fed to three differential amplifiers 9, the outputs of which are fed to an adder 10. The outputs of those amplifiers 9 are the compared outputs of the three portions which are axially separated by the distance l and circumferentially by the angle 120 degrees and are processed by a processor 11. Thus, the axially elongated flaw in the test piece can be detected at a high speed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12291678A JPS5550156A (en) | 1978-10-05 | 1978-10-05 | Eddy current loating method and device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12291678A JPS5550156A (en) | 1978-10-05 | 1978-10-05 | Eddy current loating method and device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5550156A true JPS5550156A (en) | 1980-04-11 |
JPS5744940B2 JPS5744940B2 (en) | 1982-09-24 |
Family
ID=14847766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12291678A Granted JPS5550156A (en) | 1978-10-05 | 1978-10-05 | Eddy current loating method and device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550156A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61195352A (en) * | 1985-02-25 | 1986-08-29 | エルテイーブイ・スチール・カンパニー・インコーポレイテツド | Method and device for inspecting work |
JPH029272U (en) * | 1988-06-30 | 1990-01-22 |
-
1978
- 1978-10-05 JP JP12291678A patent/JPS5550156A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61195352A (en) * | 1985-02-25 | 1986-08-29 | エルテイーブイ・スチール・カンパニー・インコーポレイテツド | Method and device for inspecting work |
JPH029272U (en) * | 1988-06-30 | 1990-01-22 |
Also Published As
Publication number | Publication date |
---|---|
JPS5744940B2 (en) | 1982-09-24 |
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