Transit zone monitor circuit

Details Transit zone monitor circuit Transit zone monitor circuit

G - Physics

08

G

340/31

G08G 1/01 (2006.01) G08G 1/065 (2006.01)

Patent

CA 1061430

TRANSIT ZONE MONITOR CIRCUIT Abstract of the Disclosure A zone monitor circuit for a transit zone having plural entry-exit ports each equipped with a sensor that generates an arrival pulse signal when a vehicle or other movable object passes through the port into the zone and that generates a departure pulse signal whenever an object passes through the port out of the zone, comprising a synchroniza- tion circuit which develops time-segregated arrival and departure signals, an occupancy counter that maintains a continuous count of the total number of arrival signals minus departure signals to afford an occupancy count representative of the number of objects within the zone and a vacancy signal indicative of an empty zone, a departure anticipation counter for developing an impending vacancy signal upon occurrence of a predetermined number of departure signals with no intervening arrival signals, and a path indicator circuit which generates binary coded path indication signals identifying traffic ports of entry and exit.

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