JPS6314904B2 - - Google Patents

Info

Publication number
JPS6314904B2
JPS6314904B2 JP56062615A JP6261581A JPS6314904B2 JP S6314904 B2 JPS6314904 B2 JP S6314904B2 JP 56062615 A JP56062615 A JP 56062615A JP 6261581 A JP6261581 A JP 6261581A JP S6314904 B2 JPS6314904 B2 JP S6314904B2
Authority
JP
Japan
Prior art keywords
signal
gap
detection
circuit
lift
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.)
Expired
Application number
JP56062615A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57178155A (en
Inventor
Masaaki Nakajima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56062615A priority Critical patent/JPS57178155A/ja
Publication of JPS57178155A publication Critical patent/JPS57178155A/ja
Publication of JPS6314904B2 publication Critical patent/JPS6314904B2/ja
Granted 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
    • G01N27/9053—Compensating for probe to workpiece spacing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
JP56062615A 1981-04-27 1981-04-27 Eddy current test equipment Granted JPS57178155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56062615A JPS57178155A (en) 1981-04-27 1981-04-27 Eddy current test equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56062615A JPS57178155A (en) 1981-04-27 1981-04-27 Eddy current test equipment

Publications (2)

Publication Number Publication Date
JPS57178155A JPS57178155A (en) 1982-11-02
JPS6314904B2 true JPS6314904B2 (en]) 1988-04-02

Family

ID=13205390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56062615A Granted JPS57178155A (en) 1981-04-27 1981-04-27 Eddy current test equipment

Country Status (1)

Country Link
JP (1) JPS57178155A (en])

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012181097A (ja) * 2011-03-01 2012-09-20 Hitachi-Ge Nuclear Energy Ltd 構造物探傷方法及び装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60146148A (ja) * 1984-01-09 1985-08-01 Kubota Ltd 渦流探傷装置
JPS60249051A (ja) * 1984-05-24 1985-12-09 Kubota Ltd 金属表面の欠陥検出装置
FR2574938B1 (fr) * 1984-12-19 1986-12-26 Snecma Methode de controle par courants de foucault sans contact et dispositif de mise en oeuvre
US8378676B2 (en) * 2009-06-05 2013-02-19 Nuovo Pignone S.P.A. System and method for detecting corrosion pitting in gas turbines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012181097A (ja) * 2011-03-01 2012-09-20 Hitachi-Ge Nuclear Energy Ltd 構造物探傷方法及び装置

Also Published As

Publication number Publication date
JPS57178155A (en) 1982-11-02

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