JPS6435261A - Probe for isolated eddy current - Google Patents
Probe for isolated eddy currentInfo
- Publication number
- JPS6435261A JPS6435261A JP62190924A JP19092487A JPS6435261A JP S6435261 A JPS6435261 A JP S6435261A JP 62190924 A JP62190924 A JP 62190924A JP 19092487 A JP19092487 A JP 19092487A JP S6435261 A JPS6435261 A JP S6435261A
- Authority
- JP
- Japan
- Prior art keywords
- transmitting coil
- coils
- connection tube
- receiving
- affected
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE:To simplify a flaw detection signal without being affected by a transmitting coil, by arranging at least two receiving coils in a steel pipe to be detected close to each other to be connected together differentially. CONSTITUTION:A transmitting coil 1 and receiving coils 21 and 22 arranged close to each other are wound on shells 31 and 32 arranged securely on the circumferential surface of a flexible connection tube 10 being separated from one another while the receiving coils 21 and 22 are connected together differentially so that a differential output becomes zero when a magnetic flux acts on both the coils 21 and 22. Moreover, a guide element 12 is fixed on the connection tube 10 as having rings at both ends thereof sandwitching a transmitting coil unit and a receiving coil unit. The coils 1, 21 and 22 are all electrically connected to a flaw detector body through a lead 6 inserted into the connection tube 10. This set up eliminates the influence of the damage in a steel pipe 5 under detection to be affected on the transmitting coil 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62190924A JPS6435261A (en) | 1987-07-30 | 1987-07-30 | Probe for isolated eddy current |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62190924A JPS6435261A (en) | 1987-07-30 | 1987-07-30 | Probe for isolated eddy current |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435261A true JPS6435261A (en) | 1989-02-06 |
Family
ID=16265956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62190924A Pending JPS6435261A (en) | 1987-07-30 | 1987-07-30 | Probe for isolated eddy current |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435261A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0370304U (en) * | 1989-11-14 | 1991-07-15 | ||
JPH03282361A (en) * | 1990-03-30 | 1991-12-12 | Nuclear Fuel Ind Ltd | Rotary type cross-wound probe |
JPH04220556A (en) * | 1990-12-20 | 1992-08-11 | Kawasaki Heavy Ind Ltd | Remote field eddy flow testing device |
JPH0557662U (en) * | 1992-01-07 | 1993-07-30 | 東京瓦斯株式会社 | Remote field eddy current sensor |
JPH0581704U (en) * | 1992-03-31 | 1993-11-05 | 大阪瓦斯株式会社 | In-pipe inspection device |
KR100395205B1 (en) * | 2001-06-01 | 2003-08-21 | 사단법인 고등기술연구원 연구조합 | Internal metal pipe inspection apparatus having centralizer |
JP2013113787A (en) * | 2011-11-30 | 2013-06-10 | Hitachi Transportation Technologies Ltd | Remote field eddy current flaw detection system and remote field eddy current flaw detection method |
-
1987
- 1987-07-30 JP JP62190924A patent/JPS6435261A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0370304U (en) * | 1989-11-14 | 1991-07-15 | ||
JPH03282361A (en) * | 1990-03-30 | 1991-12-12 | Nuclear Fuel Ind Ltd | Rotary type cross-wound probe |
JPH04220556A (en) * | 1990-12-20 | 1992-08-11 | Kawasaki Heavy Ind Ltd | Remote field eddy flow testing device |
JPH0557662U (en) * | 1992-01-07 | 1993-07-30 | 東京瓦斯株式会社 | Remote field eddy current sensor |
JPH0581704U (en) * | 1992-03-31 | 1993-11-05 | 大阪瓦斯株式会社 | In-pipe inspection device |
KR100395205B1 (en) * | 2001-06-01 | 2003-08-21 | 사단법인 고등기술연구원 연구조합 | Internal metal pipe inspection apparatus having centralizer |
JP2013113787A (en) * | 2011-11-30 | 2013-06-10 | Hitachi Transportation Technologies Ltd | Remote field eddy current flaw detection system and remote field eddy current flaw detection method |
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