Double sheet detector method for automated transaction machine
This invention relates in general to a sensing device with an improved signal to noise ratio for use in an electrically noisy environment. Specifically this invention relates to a synchronized discriminator sensing device for sheet media within an automated transaction machine, including an automate...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
26.11.2002
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| Online Access | Get full text |
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| Summary: | This invention relates in general to a sensing device with an improved signal to noise ratio for use in an electrically noisy environment. Specifically this invention relates to a synchronized discriminator sensing device for sheet media within an automated transaction machine, including an automated teller machine or any other machine capable of carrying out transfers representative of value.
An automated transaction machine includes apparatus for distinguishing between single sheets and multiple sheets in a sheet path. The apparatus includes radiation emitters () and radiation detectors (). The radiation emitters are operated to emit radiation at periodic intervals. Signal conditioners () receive signals from the radiation detectors and generate outputs responsive to the intensities sensed by the detectors substantially only during the periodic intervals. The outputs are combined, weighed and/or compared to thresholds to distinguish single and multiple sheets. The apparatus enables reliable operation in noisy electrical environments and with a wide variety of sheet properties. |
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