Mass transit inductive data communication system

Details Mass transit inductive data communication system Mass transit inductive data communication system

1994-11-28

1997-03-18

Hofsass, Jeffery

Communications: electrical

Continuously variable indicating

With particular transmitter

34087007, 34087032, 235384, 232 7, 232 12, G08C 1906

Patent

active

056126840

ABSTRACT:
A transmitter circuit and a receiver circuit couple inductively to allow data communication between a mass transit vehicle farebox and an external computer. Data communication may be performed simultaneously with removal of coins from the farebox via a vacuum hose. Two mating connectors each carry a wire coil; one coil is connected to the transmitter circuit and the other is connected to the receiver circuit. Furthermore, the same connectors that carry the coils may be used to form the vacuum hose connection. A modulated signal representing encoded binary data is applied to the transmitter coil to cause corresponding flux changes. When placed in close proximity to one another, the magnetic flux changes across the gap induce a corresponding modulated signal in the receiver coil. The induced signal in the receiver coil is then decoded to recover the original binary data. The coils thus function as halves of a transformer.

REFERENCES:
patent: 4372478 (1983-02-01), Gomez et al.
patent: 4758836 (1988-07-01), Scuilli

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