SE8701082L - Fasselektiv detektering via produkt- och/eller kvot-generering - Google Patents

Fasselektiv detektering via produkt- och/eller kvot-generering

Info

Publication number
SE8701082L
SE8701082L SE8701082A SE8701082A SE8701082L SE 8701082 L SE8701082 L SE 8701082L SE 8701082 A SE8701082 A SE 8701082A SE 8701082 A SE8701082 A SE 8701082A SE 8701082 L SE8701082 L SE 8701082L
Authority
SE
Sweden
Prior art keywords
alpha
phase
sin
cos
signal
Prior art date
Application number
SE8701082A
Other languages
English (en)
Swedish (sv)
Other versions
SE456865B (sv
SE8701082D0 (sv
Inventor
Bengt Hjalmar Toernblom
Original Assignee
Bengt Hjalmar Toernblom
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 Bengt Hjalmar Toernblom filed Critical Bengt Hjalmar Toernblom
Priority to SE8701082A priority Critical patent/SE456865B/sv
Publication of SE8701082D0 publication Critical patent/SE8701082D0/xx
Priority to EP88103938A priority patent/EP0282930A3/en
Priority to JP63061753A priority patent/JPS63308556A/ja
Priority to US07/168,416 priority patent/US4864235A/en
Publication of SE8701082L publication Critical patent/SE8701082L/
Publication of SE456865B publication Critical patent/SE456865B/sv

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

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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
SE8701082A 1987-03-17 1987-03-17 Anordning foer provning och/eller maetning, innefattande minst en faskaenslig detektor SE456865B (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8701082A SE456865B (sv) 1987-03-17 1987-03-17 Anordning foer provning och/eller maetning, innefattande minst en faskaenslig detektor
EP88103938A EP0282930A3 (en) 1987-03-17 1988-03-12 Method and device for phase-selective testing and/or measuring of test objects with eddy current techniques.
JP63061753A JPS63308556A (ja) 1987-03-17 1988-03-15 物体の試験装置
US07/168,416 US4864235A (en) 1987-03-17 1988-03-15 Phase-selective monitoring via vector transformation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8701082A SE456865B (sv) 1987-03-17 1987-03-17 Anordning foer provning och/eller maetning, innefattande minst en faskaenslig detektor

Publications (3)

Publication Number Publication Date
SE8701082D0 SE8701082D0 (sv) 1987-03-17
SE8701082L true SE8701082L (sv) 1988-09-18
SE456865B SE456865B (sv) 1988-11-07

Family

ID=20367881

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8701082A SE456865B (sv) 1987-03-17 1987-03-17 Anordning foer provning och/eller maetning, innefattande minst en faskaenslig detektor

Country Status (4)

Country Link
US (1) US4864235A ( )
EP (1) EP0282930A3 ( )
JP (1) JPS63308556A ( )
SE (1) SE456865B ( )

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006800A (en) * 1989-11-06 1991-04-09 General Electric Company Eddy current imaging apparatus and method using phase difference detection
FR2689637B1 (fr) * 1992-04-06 1996-08-09 Aerospatiale Procede et installation de controle non destructif d'une piece utilisant un capteur a courants de foucault.
US5485084A (en) * 1993-05-10 1996-01-16 The Boeing Company Apparatus and method for detecting structural cracks using a movable detector
DK76293D0 (da) * 1993-06-25 1993-06-25 Brueel & Kjaer As Forskydningstransducer
US5541510A (en) * 1995-04-06 1996-07-30 Kaman Instrumentation Corporation Multi-Parameter eddy current measuring system with parameter compensation technical field
DE10045715A1 (de) 2000-09-15 2002-03-28 Busch Dieter & Co Prueftech Verfahren und Vorrichtung zur Prüfung eines Werkstücks mittels Wirbelströmen
AU2002329471A1 (en) 2001-10-17 2003-04-28 Aea Technology Plc Method and apparatus for measuring material properties and lift-off components of an object using a magnetic probe
EP1952135A4 (en) * 2005-11-03 2011-12-14 Coastal Res Corp CONVIVIAL FOUCAULT CURRENT NETWORK
GB2456583B (en) * 2008-01-21 2012-09-05 Ge Inspection Technologies Ltd Eddy current inspection system and method of eddy current flaw detection

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721896A (en) * 1971-12-23 1973-03-20 Nippon Kokan Kk Improved phase sensitive eddy current defect detector utilizing frequency doubling of detected signal prior to phase detection
SE351493C (sv) * 1971-12-28 1974-09-23 Nippon Kokan Kk Högkänslig, med virvelströmmar arbetande feldetektor
US4061968A (en) * 1976-09-07 1977-12-06 Commissariat A L'energie Atomique Process of and apparatus for non-destructive eddy current testing involves the suppression of displayed lobes corresponding to fault parameters to be eliminated from the display
US4424486A (en) * 1980-10-14 1984-01-03 Zetec, Inc. Phase rotation circuit for an eddy current tester
SE8302738L (sv) * 1983-05-16 1984-11-17 Bengt Hjalmar Tornblom Anordning och/eller sett baserad pa frekvensvalsprincip
SE456043B (sv) * 1984-02-10 1988-08-29 Bengt Hjalmar Tornblom Sett och anordning for provning och/eller metning av elektriskt ledande provobjekt med avseende pa forendringar

Also Published As

Publication number Publication date
SE456865B (sv) 1988-11-07
JPS63308556A (ja) 1988-12-15
EP0282930A3 (en) 1989-12-13
EP0282930A2 (en) 1988-09-21
SE8701082D0 (sv) 1987-03-17
US4864235A (en) 1989-09-05

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