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Determination of coating thickness of a copper-plated steel wire by measurement of the internal wire impedance

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1 Author(s)
Bavall, L. ; Dept. of Phys. & Meas. Technol., Linkoping Inst. of Technol., Sweden

A measurement of the internal impedance of a copper-cladded steel wire by a quote measurement of the voltage across and current through the wire can be used as a method to determine the cladding thickness. An electromagnetic model accounting for the internal impedance with different values of the coating thickness on a steel wire is described. Numerical calculations based on this model have been carried out and compared with measurements. An example shows how the method can be used to model a steel wire with a coating of copper to find the expected impedance as a function of coating thickness

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Instrumentation and Measurement, IEEE Transactions on  (Volume:47 ,  Issue: 4 )