JPS56129851A - Eddy-current flaw detector for inner surface of steel pipe or the like - Google Patents

Eddy-current flaw detector for inner surface of steel pipe or the like

Info

Publication number
JPS56129851A
JPS56129851A JP3441080A JP3441080A JPS56129851A JP S56129851 A JPS56129851 A JP S56129851A JP 3441080 A JP3441080 A JP 3441080A JP 3441080 A JP3441080 A JP 3441080A JP S56129851 A JPS56129851 A JP S56129851A
Authority
JP
Japan
Prior art keywords
eddy
detecting unit
current flaw
rocker arms
steel pipe
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
JP3441080A
Other languages
Japanese (ja)
Inventor
Yasuyuki Furukawa
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3441080A priority Critical patent/JPS56129851A/en
Publication of JPS56129851A publication Critical patent/JPS56129851A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors

Abstract

PURPOSE:To make it possible to simultaneously and reliably detect flaws in the whole inner surface of a pipe which extend in arbitrary directions by using the first eddy-current flaw detecting unit which rotates, and the second eddy-current flaw detecting unit which moves only in the axial direction of a pipe according to the movement of a truck. CONSTITUTION:At the ends of rocker arms 13 and 13', the first eddy-current flaw detecting unit 14 is pinned so as to be sandwiched by the right and left rocker arms 13, 13 and 13', 13'. On the other hand, at the ends of rocker arms 41 and 42, the second eddy-current flaw detecting unit 43 is pinned through brackets 44 and 45. Then, with a rotating shaft 6 rotating, a truck 3 is moved forward, and the first detecting unit 14, the second detecting unit 43', 43 and a supporting roller 35 are entered into a steel pipe W in mentioned order. Then, collectively deciding the flaw detection contents of both the detecting units 14, 43 and 43' permits the detection of the size, type and the like of flaws.
JP3441080A 1980-03-17 1980-03-17 Eddy-current flaw detector for inner surface of steel pipe or the like Pending JPS56129851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3441080A JPS56129851A (en) 1980-03-17 1980-03-17 Eddy-current flaw detector for inner surface of steel pipe or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3441080A JPS56129851A (en) 1980-03-17 1980-03-17 Eddy-current flaw detector for inner surface of steel pipe or the like

Publications (1)

Publication Number Publication Date
JPS56129851A true JPS56129851A (en) 1981-10-12

Family

ID=12413412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3441080A Pending JPS56129851A (en) 1980-03-17 1980-03-17 Eddy-current flaw detector for inner surface of steel pipe or the like

Country Status (1)

Country Link
JP (1) JPS56129851A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115557U (en) * 1984-07-02 1986-01-29 マークテック株式会社 Eddy current testing equipment
JPS6174864U (en) * 1984-10-22 1986-05-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115557U (en) * 1984-07-02 1986-01-29 マークテック株式会社 Eddy current testing equipment
JPS6174864U (en) * 1984-10-22 1986-05-20

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