Loop data link

Details Loop data link Loop data link

1985-12-20

1987-12-22

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082554, 235384, H04Q 700, G07B 1502

Patent

active

047149256

ABSTRACT:
Data stored in a logger is transmitted from a vehicle by a responder. The data is received by a transceiver and stored in a device. Data can also be transferred in the reverse direction. An inductive loop is used to sense the presence of the vehicle and, when the vehicle is sensed, to initiate an interrogation of the vehicle. Data transfer takes place only if the vehicle is identified.

REFERENCES:
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patent: 3964024 (1976-06-01), Hutton et al.
patent: 4121102 (1978-10-01), Wilson
patent: 4209783 (1980-06-01), Ohyama et al.
patent: 4251797 (1981-02-01), Bragas et al.
patent: 4303904 (1981-12-01), Chasek
patent: 4398172 (1983-08-01), Carroll et al.
patent: 4463353 (1984-07-01), Kuzara
patent: 4473825 (1984-09-01), Walton
patent: 4510495 (1985-04-01), Sigrimis et al.

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