Abstract

Surface roughness^1,2 is a measure of topographic relief and is an important quality control parameter in steel sheet for the improvement of paintability, corrosion resistance, and surface friction. Amplitude and spacing parameters are used in describing surface roughness. The typical measure of an amplitude parameter is the average or root-mean-square value of the height of the peaks. A spacing parameter is measured as the number of peaks in an inch. Conventional stylus method can be used in measuring these two parameters only for off-line measurement for the finite section of sheet. Therefore, noncontact optical method is needed in process monitoring of roughness of steel strip.

© 1994 IEEE