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 substance

Info

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
Application number
JP11923978A
Other languages
Japanese (ja)
Inventor
Shoichi Busaka
Tamikazu Tashiro
Masao Kimijima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OSAKA SEKIYU KAGAKU KK
Original Assignee
OSAKA SEKIYU KAGAKU KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OSAKA SEKIYU KAGAKU KK filed Critical OSAKA SEKIYU KAGAKU KK
Priority to JP11923978A priority Critical patent/JPS5546123A/en
Publication of JPS5546123A publication Critical patent/JPS5546123A/en
Pending legal-status Critical Current

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
JP11923978A 1978-09-29 1978-09-29 Detection method for condition of inside surface in small size multi-tube including ferromagnetic substance Pending JPS5546123A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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