JPS5546123A - Detection method for condition of inside surface in small size multi-tube including ferromagnetic substance - Google Patents
Detection method for condition of inside surface in small size multi-tube including ferromagnetic substanceInfo
- Publication number
- JPS5546123A JPS5546123A JP11923978A JP11923978A JPS5546123A JP S5546123 A JPS5546123 A JP S5546123A JP 11923978 A JP11923978 A JP 11923978A JP 11923978 A JP11923978 A JP 11923978A JP S5546123 A JPS5546123 A JP S5546123A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- coil
- casing
- fitted
- magnetic substance
- 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 to correctly measure the flaw finding for inside and the depth of flaw, by converting the displacement of the metal contact of the unit using metal contact and magnetic substance into electric signal with electric conversion method.
CONSTITUTION: The pin 4 is fitted at one end of the two plate springs 5 so that the pin 4 is always pressed lower and it is not fallen down horizontally, and the magnetic substance 2 in interlocking with the movement of the pin 4 is fitted to the upper plate spring fitting the pin 4. Another end of the two plate springs is fixed so that the pin 4 can correctly contact and follow the inside surface of tube and the tip of the pin 4 can be extended outside of the detector casing 1, when the casing 1 is scanned inside the measured tube at the support stand 6 fitted inside the casing 1 of the detector. The coil 3 is fixed with suitable distance with the magnetic substance 2. When AC current flows to the coil 3 through the oscillator 9, the movement of the pin 4 can be measured as the inductance change of the coil 3.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11923978A JPS5546123A (en) | 1978-09-29 | 1978-09-29 | Detection method for condition of inside surface in small size multi-tube including ferromagnetic substance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11923978A JPS5546123A (en) | 1978-09-29 | 1978-09-29 | Detection method for condition of inside surface in small size multi-tube including ferromagnetic substance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5546123A true JPS5546123A (en) | 1980-03-31 |
Family
ID=14756400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11923978A Pending JPS5546123A (en) | 1978-09-29 | 1978-09-29 | Detection method for condition of inside surface in small size multi-tube including ferromagnetic substance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5546123A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0212007A (en) * | 1988-06-30 | 1990-01-17 | Nikki Maintenance Kk | Instrument for measuring depth of fault on internal surface of pipe |
-
1978
- 1978-09-29 JP JP11923978A patent/JPS5546123A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0212007A (en) * | 1988-06-30 | 1990-01-17 | Nikki Maintenance Kk | Instrument for measuring depth of fault on internal surface of pipe |
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