Coin validators

Details Coin validators Coin validators

G - Physics

07

D

G07D 5/02 (2006.01) G01B 7/06 (2006.01) G07D 5/08 (2006.01)

Patent

CA 2063738

A coin validator (2) has a thickness sensor formed by two coils (10, 12) positioned one on each side of the coin path. The coil outputs are processed separately using a look-up table (20) to derive values which are linearly related to coin position across the width of the passage, using the same constant of proportionality for both sensors. Accordingly, by combining the processed outputs there is derived a value which is independent of coin position and which can be peak-detected to indicate thickness.

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