JPS57179656A - Eddy current test method - Google Patents

Eddy current test method

Info

Publication number
JPS57179656A
JPS57179656A JP6472881A JP6472881A JPS57179656A JP S57179656 A JPS57179656 A JP S57179656A JP 6472881 A JP6472881 A JP 6472881A JP 6472881 A JP6472881 A JP 6472881A JP S57179656 A JPS57179656 A JP S57179656A
Authority
JP
Japan
Prior art keywords
patterns
flaws
frequency
absence
flaw
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
JP6472881A
Other languages
Japanese (ja)
Inventor
Hidetaka Ono
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP6472881A priority Critical patent/JPS57179656A/en
Publication of JPS57179656A publication Critical patent/JPS57179656A/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
    • G01N27/9046—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 by analysing electrical signals

Abstract

PURPOSE:To decide the presence or absence of a flaw easily and correctly by a method wherein patterns of amplitude and phase based on the change in impedance being caused when a part having no flaw is detected are compared with patterns obtained from a part having flaws. CONSTITUTION:A detecting pickup 7 is set beforehand near a no-flaw part in a prescribed sample, and a frequency determined by a frequency scanner 2 is scanned automatically to drive an eddy current test equipment 5. The pickup 7 detects impedance made with the sample for each frequency, the change in impedance thus obtained is analyzed by a frequency analyzer 3, and patterns of amplitude and phase informations are stored in a recognition unit 1. These patterns are compared with patterns obtained when a member to be inspected is detected for its flaws, the presence or absence of flaws is determined through the comparison, and thus the presence or absence of flaws can be determined easily and correctly without scanning the detecting pickup.
JP6472881A 1981-04-28 1981-04-28 Eddy current test method Pending JPS57179656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6472881A JPS57179656A (en) 1981-04-28 1981-04-28 Eddy current test method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6472881A JPS57179656A (en) 1981-04-28 1981-04-28 Eddy current test method

Publications (1)

Publication Number Publication Date
JPS57179656A true JPS57179656A (en) 1982-11-05

Family

ID=13266496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6472881A Pending JPS57179656A (en) 1981-04-28 1981-04-28 Eddy current test method

Country Status (1)

Country Link
JP (1) JPS57179656A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199061U (en) * 1987-06-12 1988-12-21
EP0296417A2 (en) * 1987-06-23 1988-12-28 Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co. KG Method for testing an object
GB2361065A (en) * 2000-04-05 2001-10-10 Andrew Michael Pratt Flaw detecting probe and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199061U (en) * 1987-06-12 1988-12-21
EP0296417A2 (en) * 1987-06-23 1988-12-28 Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co. KG Method for testing an object
GB2361065A (en) * 2000-04-05 2001-10-10 Andrew Michael Pratt Flaw detecting probe and method

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