SURFACE CONDITION MONITORING OF UNALLOYED STEEL SHEET BY MEASURING FERROMAGNETIC PROPERTIES AND USING MULTIPARAMETER DATA-ANALYSIS

Initial investigations into coated steel sheets were conducted to veri fy whether sample- and batch-independent classification of surface con dition can be achieved with multi-inductive data acquisition and multi variate data analysis without using a priori information. Using an 'in tegrated sensor' - a multi-inductive sensor - it is possible to obtain parameters of eddy currents, hysteresis and noise voltage with PC con trol. These parameters are the input values of multivariate data analy sis.