Coin identification procedure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Sep 27, 1996
filing date -
Sep 28, 1995
priority date (Note) -
Expired
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Abstract
The energy of the sound radiation caused by the impact of the coin to be analyzed upon a hard surface is split into different frequency bands, the energy of every such band is obtained and the ratios between them are then worked out, obtaining parameters that are then compared against values representing valid coins. The device includes a bank of filters (6, 7 and 8), integrators (9, 10 and 11) connected to the outlet of the filters and capable of being activated from a microprocessor (17) and an analogue-digital converter to which the output of the various integrators is then connected through a multiplexer.
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