Method and apparatus for controlling transponder signaling

Details Method and apparatus for controlling transponder signaling Method and apparatus for controlling transponder signaling

1996-03-25

1998-05-05

Hofsass, Jeffery

Communications: electrical

Traffic control indicator

Combined

3403111, 455 384, 379 76, G08G 100

Patent

active

057481067

ABSTRACT:
A battery powered transponder in a vehicle for communicating with a toll station or weigh station lights one of a few LEDs to indicate whether a bypass of the station is authorized or denied. A transmit/receive circuit sends data to an IC which signals the instruction to a microprocessor which is programmed to activate the proper LED when so instructed for a short period and then maintains a recall state for a long period. A pushbutton switch connected to the microprocessor, if operated within the long period, triggers a replay of the proper LED to verify the instruction while minimizing power consumption.

REFERENCES:
patent: 4975694 (1990-12-01), McLaughlin
patent: 5012219 (1991-04-01), Henry
patent: 5192947 (1993-03-01), Neustein
patent: 5235327 (1993-08-01), Igarashi et al.
patent: 5239679 (1993-08-01), Murai
patent: 5602538 (1997-02-01), Orthmann et al.

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