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Eddy current measurements of surface roughness
Author(s) -
Dziczkowski Leszek
Publication year - 2010
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201010295
Subject(s) - eddy current , surface roughness , conductivity , surface finish , materials science , surface (topology) , electrical impedance , electromagnetic coil , mechanics , current (fluid) , composite material , electrical engineering , physics , engineering , geometry , mathematics , quantum mechanics
The paper proposes a method for simultaneous measurements of the material conductivity and its surface roughness for non‐ferromagnetic materials. The method takes advantage of the effect exercised by eddy currents onto impedance of a contact coil. The essence of the method is to eliminate the influence of the surface unevenness onto measurements of conductivity by the calculation of a correcting factor that serves as a specific equivalent of the surface roughness. (© 2010 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)