Multiple sheet detector apparatus and method
First Claim
1. An apparatus comprising:
- a sound transmitter, operative to transmit a sound signal through a pathway;
a sound receiver operative to produce at least one receiver signal responsive to the sound signal after having passed through the pathway;
a first correlation filter and a second correlation filter, wherein the first correlation filter is operative responsive to the at least one receiver signal and a first reference signal to generate a first output representative of a difference in phase with respect to the at least one receiver signal and the first reference signal, wherein the second correlation filter is operative responsive to the at least one receiver signal and a second reference signal to generate a second output representative of a difference in phase with respect to the at least one receiver signal and the second reference signal, wherein the second reference signal lags in phase relative to the first reference signal;
at least one processor, wherein the at least one processor is operative responsive to changes in the first and the second outputs of the correlation filters to determine information representative of a phase delay produced in the sound signal responsive to the sound signal passing through sheet media in the pathway, wherein the at least one processor is operative to distinguish between sheet media in the pathway that corresponds to a single sheet and sheet media in the pathway that corresponds to multiple sheets responsive to the information representative of phase delay.
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Accused Products
Abstract
A detector for a deposit accepting apparatus of an automated banking machine includes an ultrasonic transmitter driven by a driving signal operative to cause the ultrasonic transmitter to transmit an ultrasonic sound signal through a sheet pathway of the detector. The detector also includes an ultrasonic receiver operative to generate a receiver signal responsive to the ultrasonic sound signal. The detector further includes first and second correlation filters. The first and second correlation filters are operative to generate first and second outputs responsive to the receiver signal. At least one processor is operative responsive to the first and second outputs of the correlation filters to determine information associated with changes in phase of the ultrasonic sound signal and to distinguish between single and multiple sheets in the pathway responsive to the information associated with changes in phase.
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Citations
47 Claims
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1. An apparatus comprising:
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a sound transmitter, operative to transmit a sound signal through a pathway; a sound receiver operative to produce at least one receiver signal responsive to the sound signal after having passed through the pathway; a first correlation filter and a second correlation filter, wherein the first correlation filter is operative responsive to the at least one receiver signal and a first reference signal to generate a first output representative of a difference in phase with respect to the at least one receiver signal and the first reference signal, wherein the second correlation filter is operative responsive to the at least one receiver signal and a second reference signal to generate a second output representative of a difference in phase with respect to the at least one receiver signal and the second reference signal, wherein the second reference signal lags in phase relative to the first reference signal; at least one processor, wherein the at least one processor is operative responsive to changes in the first and the second outputs of the correlation filters to determine information representative of a phase delay produced in the sound signal responsive to the sound signal passing through sheet media in the pathway, wherein the at least one processor is operative to distinguish between sheet media in the pathway that corresponds to a single sheet and sheet media in the pathway that corresponds to multiple sheets responsive to the information representative of phase delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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a) directing a sound signal through sheet media moving in a pathway; b) producing a receiver signal responsive to the sound signal, wherein at least a portion of the at least one receiver signal is produced responsive to the sound signal after having passed through the sheet media; c) through operation of a first correlation filter, generating responsive to the at least one receiver signal and a first reference signal, a first output representative of a difference in phase with respect to the at least one receiver signal and the first reference signal; d) through operation of a second correlation filter, generating responsive to the at least one receiver signal and a second reference signal, a second output representative of a difference in phase with respect to the at least one receiver signal and the second reference signal, wherein the second reference signal lags in phase relative to the first reference signal; e) responsive to changes in the first and second outputs, determining information representative of a phase delay produced in the sound signal; and f) determining whether the sheet media in the pathway corresponds to at least one of a single sheet and multiple sheets responsive to the information representative of phase delay. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method comprising:
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a) directing a sound signal through sheet media moving in a pathway; b) producing at least one receiver signal responsive to the sound signal, wherein at least a portion of the at least one receiver signal is produced responsive to the sound signal after having passed through the sheet media; c) using first and second correlation filters to provide first and second outputs representative of phase information responsive to the at least one receiver signal; d) acquiring a first pair of output values associated with a first sample of the first and second outputs; e) determining that the first sample is associated with a phase angle that falls within a first about ninety degree span of angles; f) acquiring a second pair of output values associated with a second sample of the first and second outputs, wherein the second sample follows the acquisition of the first sample in time; g) comparing the second pair of samples and the first pair of samples; h) determining responsive to (g) that the second sample is associated with a phase angle tat falls within a second about ninety degree span of angles, which second span is adjacent to the first span; i) determining responsive to (h) reconstructed phase information associated with the second sample; and j) determining whether the sheet media in the pathway corresponds to at least one of a single sheet and multiple sheets responsive to the reconstructed phase information. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. An apparatus comprising:
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a sound transmitter operative to transmit a sound signal through a pathway; a sound receiver operative to produce at least one receiver signal responsive to the sound signal after having passed through the pathway; a first filter and a second filter, wherein the first filter is operative responsive to the at least one receiver signal and a first reference signal to generate a first output representative of a difference in phase with respect to the at least one receiver signal and the first reference signal, wherein the second filter is operative responsive to the at least one receiver signal and a second reference signal to generate a second output representative of a difference in phase with respect to the at least one receiver signal and the second reference signal, wherein the first and second reference signals differ in phase; at least one processor, wherein the at least one processor is operative responsive to changes in the first and the second outputs of the first and second filters to determine information representative of a phase delay produced in the sound signal responsive to the sound signal passing through sheet media in the pathway, at least one transport, wherein the at least one transport is operative to move the sheet media responsive to the determined information representative of the phase delay produced in the sound signal. - View Dependent Claims (37, 38, 39)
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40. A method comprising:
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a) directing a sound signal through sheet media moving in a pathway; b) producing a receiver signal responsive to the sound signal, wherein at least a portion of the at least one receiver signal is produced responsive to the sound signal after having passed through the sheet media; c) through operation of a first filter, generating responsive to the at least one receiver signal and a first reference signal, a first output representative of a difference in phase with respect to the at least one receiver signal and the first reference signal; d) through operation of a second filter, generating responsive to the at least one receiver signal and a second reference signal, a second output representative of a difference in phase with respect to the at least one receiver signal and the second reference signal, wherein the first and second reference signals differ in phase; e) responsive to changes in the first and second outputs, determining information representative of a phase delay produced in the sound signal; and f) operating at least one transport to move the sheet media responsive to the information determined in (c). - View Dependent Claims (41, 42, 43)
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44. A method comprising:
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a) directing a sound signal through sheet media moving in a pathway; b) producing at least one receiver signal responsive to the sound signal, wherein at least a portion of the at least one receiver signal is produced responsive to the sound signal after having passed through the sheet media; c) producing a first output representative of changes in phase of the at least one receiver signal relative to a first reference signal; d) producing a second output representative of changes in phase of the at least one receiver signal relative to a second reference signal, wherein the first and second reference signals differ in phase; e) acquiring a first pair of output values associated with a first sample of the first and second outputs; f) acquiring a second pair of output values associated with a second sample of the first and second outputs, wherein the second sample follows the acquisition of the first sample in time; g) comparing the second pair of samples and the first pair of samples; and h) responsive to (g), operating at least one transport to move the sheet media. - View Dependent Claims (45, 46, 47)
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Specification