PROCESS AND APPARATUS FOR THE IDENTIFICATION OF METAL DISC-SHAPED PIECES

摘要

Method and apparatus for the identification of metal disc-shaped pieces, specially applicable to coins, comprised of a core and a crown of different compositions, consisting in measuring the peak P>1< of the electric signal produced by the passage of the crown (8) through the first electromagnetic sensor (2); the detection and measurement of one of the secondary peaks P>3<, P>4< of the electric signal obtained by the passage of the crown (8) through the first electromagnetic sensor (2); and the measurement of the value P>2< of the electric signal produced by the passage of the core (9) through a second electromagnetic sensor (3) at the same time as peak P>1< is detected.