NO974901L - Method and apparatus for measuring ferro-magnetic articles - Google Patents

Method and apparatus for measuring ferro-magnetic articles

Info

Publication number
NO974901L
NO974901L NO974901A NO974901A NO974901L NO 974901 L NO974901 L NO 974901L NO 974901 A NO974901 A NO 974901A NO 974901 A NO974901 A NO 974901A NO 974901 L NO974901 L NO 974901L
Authority
NO
Norway
Prior art keywords
objects
magnetic fields
anomalies
magnetic articles
coil
Prior art date
Application number
NO974901A
Other languages
Norwegian (no)
Other versions
NO974901D0 (en
Inventor
Goeran Larsson
Jan Sundstroem
Original Assignee
Goeran Larsson
Jan Sundstroem
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
Priority claimed from PCT/SE1995/000444 external-priority patent/WO1996034279A1/en
Application filed by Goeran Larsson, Jan Sundstroem filed Critical Goeran Larsson
Priority to NO974901A priority Critical patent/NO974901L/en
Publication of NO974901D0 publication Critical patent/NO974901D0/en
Publication of NO974901L publication Critical patent/NO974901L/en

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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

Fremgangsmåte og innretning for å detektere anomaliteter i gjenstander av ferromagnetiske materialer, kjennetegnet ved at målemidlene (9) omfattter minst én spole (20) som er plassert mot objektet (1) som skal måles, at spolen forsynes med vekselstrøm som induserer virvelstrømmer i gjenstandene som igjen gir magnetiske felt som varierer avhengig av anomalitetene, at de resulterende magnetfeltene detekteres av målemidlene og at de detekterte magnetfeltene er et mål på graden av anomaliteter i gjenstandene (1).Method and device for detecting anomalies in objects of ferromagnetic materials, characterized in that the measuring means (9) comprise at least one coil (20) placed against the object (1) to be measured, that the coil is supplied with alternating current which induces eddy currents in the objects which again, magnetic fields that vary depending on the anomalies, that the resulting magnetic fields are detected by the measuring means and that the detected magnetic fields are a measure of the degree of anomalies in the objects (1).

NO974901A 1995-04-24 1997-10-23 Method and apparatus for measuring ferro-magnetic articles NO974901L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO974901A NO974901L (en) 1995-04-24 1997-10-23 Method and apparatus for measuring ferro-magnetic articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/SE1995/000444 WO1996034279A1 (en) 1995-04-24 1995-04-24 Method and device for measuring ferro-magnetic objects
NO974901A NO974901L (en) 1995-04-24 1997-10-23 Method and apparatus for measuring ferro-magnetic articles

Publications (2)

Publication Number Publication Date
NO974901D0 NO974901D0 (en) 1997-10-23
NO974901L true NO974901L (en) 1997-12-23

Family

ID=34797881

Family Applications (1)

Application Number Title Priority Date Filing Date
NO974901A NO974901L (en) 1995-04-24 1997-10-23 Method and apparatus for measuring ferro-magnetic articles

Country Status (1)

Country Link
NO (1) NO974901L (en)

Also Published As

Publication number Publication date
NO974901D0 (en) 1997-10-23

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