JPS5655851A - Flaw-detecting method by surface wave - Google Patents
Flaw-detecting method by surface waveInfo
- Publication number
- JPS5655851A JPS5655851A JP13156779A JP13156779A JPS5655851A JP S5655851 A JPS5655851 A JP S5655851A JP 13156779 A JP13156779 A JP 13156779A JP 13156779 A JP13156779 A JP 13156779A JP S5655851 A JPS5655851 A JP S5655851A
- Authority
- JP
- Japan
- Prior art keywords
- conductors
- coil
- flaw
- wavelength
- inspected material
- 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
Abstract
PURPOSE: To enable flaw-detection for steel materials whose shape of cross section is round, polygonal, etc. by a method wherein a double coil is formed by winding two conductors several times with a pitch of λ at intervals of half of the length of the prescribed wavelength λ and two conductors are connected with each other to form terminals.
CONSTITUTION: A bobbin 6 made of highly-heatresisting insulation material is wound movably along the outer periphery of an inspected material M and further two conductors 7 and 8 are wound several times on the bobbin. On the occasion, the interval between the conductors 7 and 8 is set to be half (λ/2) of the wavelength λ generated in the inspected material, while the pitch of two conductors is made to be equal to the wavelength λ. Moreover, the starting end 71 of winding and the final end 72 thereof of one coil of the double coil are connected with the final end and the starting end of the other coil respectively, whereby terminals 70 and 80 are formed. The cross-sectional shape of the coil is formed in accordance with the inspected material and a high-frequency power source 9 is connected to the common terminals 70 and 80, whereby the surface wave 5 of an electromagnetic supersonic wave is propagated to the inspected material M and thus the flaw-detection becomes possible.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13156779A JPS5655851A (en) | 1979-10-12 | 1979-10-12 | Flaw-detecting method by surface wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13156779A JPS5655851A (en) | 1979-10-12 | 1979-10-12 | Flaw-detecting method by surface wave |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5655851A true JPS5655851A (en) | 1981-05-16 |
Family
ID=15061073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13156779A Pending JPS5655851A (en) | 1979-10-12 | 1979-10-12 | Flaw-detecting method by surface wave |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5655851A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57203950A (en) * | 1981-06-10 | 1982-12-14 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic flaw detector |
JPS57203949A (en) * | 1981-06-10 | 1982-12-14 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic flaw detector |
-
1979
- 1979-10-12 JP JP13156779A patent/JPS5655851A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57203950A (en) * | 1981-06-10 | 1982-12-14 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic flaw detector |
JPS57203949A (en) * | 1981-06-10 | 1982-12-14 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic flaw detector |
JPH0145577B2 (en) * | 1981-06-10 | 1989-10-04 | Sumitomo Kinzoku Kogyo Kk |
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