Coin recognition apparatus and coin recognition method
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United States of America Patent
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Jul 23, 2013
Grant Date -
Sep 1, 2011
app pub date -
Nov 10, 2008
filing date -
Nov 10, 2008
priority date (Note) -
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Abstract
In a coin recognition apparatus, when an oscillator control unit applies a synthesized signal containing signals of a plurality of designated frequencies to an oscillator coil, an AD (Analog-to-Digital) converting unit converts an output signal from a receiving coil into a digital signal. A frequency expansion unit expands the digital signal on a frequency axis. A coin recognition unit recognizes a coin based on an amplitude of each signal of the designated frequency extracted from the expanded signal. Furthermore, if the coin recognition apparatus detects a coin center, which is a substantially central line on a surface of the coin, has reached a magnetic sensor based on the output signal from the receiving coil when a single frequency signal is applied to the oscillator coil, the synthesized signal is applied to the oscillator coil.
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