Test method and apparatus for noncontact and nondestructive recognition of irregularities in the wall thickness of ferromagnetic pipes

An electric current comprising a plurality of harmonic components is passed through the pipe under test, a magnetic field produced by it outside the pipe is measured, a spectrum of the electric current is measured, a spectrum from measured magnetic field data is also obtained. The ratios between ide...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KRIVOI GUENNADI, KALLMEYER JOHANNES PETER
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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