G - Physics – 07 – D
Patent
G - Physics
07
D
G07D 7/12 (2006.01) G07D 7/20 (2006.01)
Patent
CA 2379146
A method for discriminating between currency bills of different denominations which comprises the steps of illuminating a predetermined section of a currency bill by focusing at least one strip of light thereupon, detecting light reflected off the illuminated section of the bill to generate an analog reflectance signal, and generating relative lateral displacement between the strip of light and the bill so as to illuminate and optically scan successive sections of the bill along a predetermined dimension thereof. A series of analog reflectance signals are obtained, corresponding to light reflected from each of the successive bill sections; the reflectance signals being taken at intervals corresponding to successive increments of displacement of the bill relative to the strip of light. The series of analog reflectance signals are digitized and processed to yield a set of digital data samples which, in combination, represent a data pattern characteristic of the currency denomination of the bill. A set of master characteristic patterns are generated and stored, and the data pattern for the scanned currency bill is compared to each of the stored master patterns to determine the degree of correlation therebetween, and thereby to identify the denomination of the currency bill. Correspondingly, a currency evaluation device includes a feed mechanism for receiving a stack of currency bills, and feeding the bills in the direction of a predetermined dimension of the bills, one at a time, to a feed station. A bill-transport mechanism transports bills from the feed mechanism to a stacking mechanism. A stationary optical scanning head located between the feed and stacking mechanisms scans of least a preselected segment of each bill transported between the feed and stacking mechanisms by the transport mechanism, and produces an output signal representing the scanned image. Signal-processing means receives the output signal and determines the denomination of each scanned bill.
Bauch Aaron M.
Csulits Frank M.
Graves Bradford T.
Jones John E.
Jones William J.
Cummins-Allison Corp.
Marks & Clerk
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