Tube status sensing method and control field of the invention
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United States of America Patent
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Issued Date -
Mar 29, 2007
app pub date -
Sep 26, 2005
filing date -
Sep 26, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system for determining the 'fill' status of a coin tube in a coin handling device, including directing periodic incident waves of variable frequencies into the air space above the coins in the coin tube in an incremental fashion, under control of a processor, such as by use of a small speaker preferably positioned at or near the top of the coin tube, such that, for each incident wave, the periodic incident wave will be reflected by the closed bottom end of the coin tube and/or the coins therein, and the reflected wave will interact with the continuing incident wave to effect a resultant waveform in the open space above the coins. The resultant waveforms are monitored, such as by use of small microphone also preferably positioned at or near the top of the coin tube, and information therefrom is processed by the processor to determine the fundamental frequency for the air space above the coins in the coin tube, from which it is possible to calculate and determine the number of coins of a given type in the coin tube.
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