Registers – Coded record sensors – Particular sensor structure
Patent
1988-06-17
1989-08-08
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
235463, G06K 710
Patent
active
048555819
ABSTRACT:
Scanned barcodes represented by an electrical signal are preprocessed in a PLA and delivered to a microprocessor in a form that permits efficient final processing of the data. High speed edge detection produce edge markers for the control logic and counting circuits coupled with a Johnson state counter to logically sequence the processor. Logarithmic conversion compresses the counted time interval to a single data word that can most efficiently be processed by the host microprocessor. Logic between the preprocessor and the microprocessor transfer digital representations of each bar and space to preassigned respective areas in the microprocessor memory. Bar/space margin detection performs a ratiometric comparison of each bar and space to determine every occurrence of 10:1 ratios and both bar/space and space/bar. Pointer signal information is transferred to the microprocessor indicating precisely where in memory each 10:1 margin ratio is located. A digital filter excludes spurious bar/space width in the preprocessor.
REFERENCES:
patent: 3806706 (1974-04-01), Hasslinger et al.
patent: 3866024 (1975-02-01), Williams
patent: 3887792 (1975-06-01), Williams
patent: 3909787 (1975-09-01), Laurer et al.
patent: 3916154 (1975-10-01), Hare
patent: 3986000 (1976-10-01), McJohnson
patent: 4014514 (1978-08-01), Sherer et al.
patent: 4074852 (1978-02-01), Wescott et al.
patent: 4175693 (1979-11-01), Nakanishi
patent: 4282426 (1981-08-01), Neseem et al.
patent: 4323772 (1982-04-01), Serge
patent: 4329574 (1982-05-01), Jordan, Jr.
patent: 4354101 (1982-10-01), Hester et al.
patent: 4438327 (1984-03-01), Smith
patent: 4602152 (1986-07-01), Dittakavi
Mertel Michael E.
Thomas James E.
Jackson Larry A.
Microscan Systems Incorporated
Pitts Harold I.
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