Coin discriminator
First Claim
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1. A method of categorizing coins/tokens, including the steps of:
- (a) energizing detect coils, between which at least part of a coin/token is located, with a single pulse,(b) detecting the unmodified back EMF curve of the decaying pulse,(c) analyzing said unmodified back EMF curve to measure at least one characteristic of said unmodified back EMF curve,(d) comparing said at least one characteristic with the corresponding characteristic(s) of a reference unmodified back EMF curve to determine therefrom into which of a number of predetermined categories said coin/token falls.
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Abstract
A method of categorizing coins/tokens by energizing detect coils with a single pulse detecting the back EMF curve of the decaying pulse information, analyzing the unmodified back EMF curve to extract therefrom a number of variables and processing those variables to provide values proportional to the variables, and comparing the values of the coin/token to at least one of a number of reference values to determine into which of a number of predetermined categories the coin/token falls.
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Citations
16 Claims
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1. A method of categorizing coins/tokens, including the steps of:
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(a) energizing detect coils, between which at least part of a coin/token is located, with a single pulse, (b) detecting the unmodified back EMF curve of the decaying pulse, (c) analyzing said unmodified back EMF curve to measure at least one characteristic of said unmodified back EMF curve, (d) comparing said at least one characteristic with the corresponding characteristic(s) of a reference unmodified back EMF curve to determine therefrom into which of a number of predetermined categories said coin/token falls. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of catagorising coins/tokens, including the steps of:
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(a) energising detect coils, between which at least a part of a coin/token is located, with a single pulse, (b) detecting the back EMF curve of the decaying pulse information, (c) analysing the unmodified back EMF curve to extract therefrom a number of variables and processing those variables to provide values proportional to the variables, (d) comparing said values of said coin/token with a number of reference values to determine into which of a number of pre-determined categories said coin token falls;
said comparison being made using the formula
space="preserve" listing-type="equation">V(t)=Ae.sup.-σ
t sin (ω
t+φ
)+Be.sup.-α
twherein; V(t) is the voltage at time t A is the amplitude of the oscillating waveform B is the amplitude of the direct current component φ
is the phase angle of the response triggering delayω
is 2π
ƒƒ
is the frequency of oscillationσ
is the decay associated with the oscillating waveformα
is the decay associated with the direct current component. - View Dependent Claims (12, 13, 14)
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15. A method of categorizing coins/tokens, including the steps of:
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(a) energizing detect coils, between which at least part of a coin/token is located, with a single pulse; (b) detecting the back EMF curve of the decaying pulse information; (c) analyzing the unmodified back EMF curve to extract therefrom one or more variables and processing said one or more variables to provide values proportional to said one or more variables; and (d) comparing said values of said coin/token with at least one of a number of reference values to determine into which of a number of predetermined categories said coin/token falls, wherein said comparison is made using the formula
space="preserve" listing-type="equation">V(t)=Ae.sup.-σ
t sin (ω
t+φ
)+Be.sup.-α
twherein; V(t) is the voltage at time t A is the amplitude of the oscillating wave form B is the amplitude of the direct current component φ
is the phase angle of the response triggering delayω
is 2π
ƒƒ
is the frequency of oscillationσ
is the decay associated with the oscillating waveformα
is the decay associated with the direct current component.
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16. A method of categorizing coins/tokens, including the steps of:
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(a) energizing detect coils, between which at least part of a coin/token is located, with a single pulse; (b) detecting the back EMF curve of the decaying pulse information; (c) analyzing the unmodified back EMF curve to extract therefrom one or more variables and processing said one or more variables to provide values proportional to said one or more variables; and (d) comparing said values of said coin/token with at least one of a number of reference values to determine into which of a number of predetermined categories said coin/token falls, wherein the step of analyzing the unmodified back EMF curve comprises the steps of; comparing said unmodified back EMF curve to a reference unmodified back EMF curve; and determining said values by calculating the difference of said one or more variables between said unmodified back EMF curve and said reference unmodified back EMF curve.
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Specification