JPS56154657A - Probe coil for whirling crack detection - Google Patents

Probe coil for whirling crack detection

Info

Publication number
JPS56154657A
JPS56154657A JP5742880A JP5742880A JPS56154657A JP S56154657 A JPS56154657 A JP S56154657A JP 5742880 A JP5742880 A JP 5742880A JP 5742880 A JP5742880 A JP 5742880A JP S56154657 A JPS56154657 A JP S56154657A
Authority
JP
Japan
Prior art keywords
inspected
magnetic field
coils
probe coils
whirling
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
JP5742880A
Other languages
Japanese (ja)
Inventor
Hitoshi Tanaka
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 Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5742880A priority Critical patent/JPS56154657A/en
Publication of JPS56154657A publication Critical patent/JPS56154657A/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

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)

Abstract

PURPOSE:To perform accurate inspection in a short time by a method wherein plurality of coils are arranged in the form of concentric circles to make a local magnetic field so as to detect the varying impedance of coil caused by a whirl current generated at said part. CONSTITUTION:In the circular probe coils 3A and 3B having different diameters and circularly wound about in the same number of turns and arranged concentrically, one end 4C of each wire is connected each other while the other ends 4A and 4B are made into the feeding elements. When to said probe coils the junction part, which is the inspection part of the material to be inspected, is put to let flow the currents with the same frequency, same amplitude and the antiphase, a magnetic field is generated at a circular part surrounded by both probe coils and being given said magnetic field the whirl current flows through the material to be inspected. In case the abnormality exists in the junction part of the material to be inspected the varied impedance of the coil detects it.
JP5742880A 1980-04-30 1980-04-30 Probe coil for whirling crack detection Pending JPS56154657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5742880A JPS56154657A (en) 1980-04-30 1980-04-30 Probe coil for whirling crack detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5742880A JPS56154657A (en) 1980-04-30 1980-04-30 Probe coil for whirling crack detection

Publications (1)

Publication Number Publication Date
JPS56154657A true JPS56154657A (en) 1981-11-30

Family

ID=13055378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5742880A Pending JPS56154657A (en) 1980-04-30 1980-04-30 Probe coil for whirling crack detection

Country Status (1)

Country Link
JP (1) JPS56154657A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855677A (en) * 1988-03-11 1989-08-08 Westinghouse Electric Corp. Multiple coil eddy current probe and method of flaw detection
US4856337A (en) * 1987-07-30 1989-08-15 Westinghouse Electric Corp. Apparatus and method for providing a combined ultrasonic and eddy current inspection of a tube
US4955235A (en) * 1987-07-30 1990-09-11 Westinghouse Electric Corp. Apparatus and method for providing a combined ultrasonic and eddy current inspection of a metallic body
US5068608A (en) * 1989-10-30 1991-11-26 Westinghouse Electric Corp. Multiple coil eddy current probe system and method for determining the length of a discontinuity
CN104750978A (en) * 2015-03-12 2015-07-01 华中科技大学 Beam member damage recognition method based on antiresonant frequency and particle swarm optimization

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856337A (en) * 1987-07-30 1989-08-15 Westinghouse Electric Corp. Apparatus and method for providing a combined ultrasonic and eddy current inspection of a tube
US4955235A (en) * 1987-07-30 1990-09-11 Westinghouse Electric Corp. Apparatus and method for providing a combined ultrasonic and eddy current inspection of a metallic body
US4855677A (en) * 1988-03-11 1989-08-08 Westinghouse Electric Corp. Multiple coil eddy current probe and method of flaw detection
EP0332048A2 (en) * 1988-03-11 1989-09-13 Westinghouse Electric Corporation Multiple coil eddy current probe and method of flaw detection
US5068608A (en) * 1989-10-30 1991-11-26 Westinghouse Electric Corp. Multiple coil eddy current probe system and method for determining the length of a discontinuity
CN104750978A (en) * 2015-03-12 2015-07-01 华中科技大学 Beam member damage recognition method based on antiresonant frequency and particle swarm optimization

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