Coin validation by signal processing

Details Coin validation by signal processing Coin validation by signal processing

2006-04-11

2006-04-11

Walsh, Donald P. (Department: 3653)

Check-actuated control mechanisms

Including means to test validity of check

C194S327000

Reexamination Certificate

active

07025190

ABSTRACT:
A method of validating coins which includes a piezoelectric element to convert movement caused by the collision of a coin to a signal and a processor to analyse the signal. The signal is digitized to produce a sequence of values. The processor analyses portions of the digitized signal to derive characterizing features of the signal and discriminates between valid and invalid coins based on the characterizing features.

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