Title :
Determination of coating thickness of a copper-plated steel wire by measurement of the internal wire impedance
Author_Institution :
Dept. of Phys. & Meas. Technol., Linkoping Inst. of Technol., Sweden
fDate :
8/1/1998 12:00:00 AM
Abstract :
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
Keywords :
claddings; copper; eddy current testing; electric impedance measurement; electroplated coatings; inspection; steel; thickness measurement; Hankel functions; Maxwell curl equation; cladding thickness; coating thickness detector; coating thickness determination; copper-plated steel wire; eddy current testing; electromagnetic model; internal wire impedance measurement; two-conductor wire; Coatings; Copper; Current measurement; Electromagnetic measurements; Electromagnetic modeling; Impedance measurement; Steel; Thickness measurement; Voltage measurement; Wire;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
