Rj. Zhang et al., A SPHERICAL CAPACITIVE PROBE FOR MEASURING THE THICKNESS OF COATINGS ON METALS, Measurement science & technology, 8(9), 1997, pp. 1028-1033
This paper proposes a new method of using the spherical capacitive pro
be instead of the common planar probe to increase the accuracy in meas
uring the thickness of non-conducting coatings on metals. The measurin
g conversion model of the spherical capacitive probe and Its electric
circuit are discussed and effective methods for overcoming the unfavou
rable influence caused by the spherical capacitive probe are introduce
d as well.