Device and method for discriminating coins

摘要

A device and method for discriminating coins traveling along a track between an inlet and one or more outlets, wherein a pair of inductive sensors formed by a first inductive sensor (1) and a second inductive sensor (2) are placed facing each other. The pair of sensors (1, 2) are excited in at least two different operation modes; for each operation mode, several first measurements relating to the first inductive sensor (1) and several second measurements relating to the second inductive sensor (2) are carried out. The excitation is carried out at excitation frequencies lower than 500 kHz. And at least one compensation term ( DELTA z) is calculated based on said first and second measurements, and said compensation term ( DELTA z) is applied to several phase and/or counterphase configuration measurements (z). <IMAGE>