Proximity identification system with lateral flux magnetic rod c

Details Proximity identification system with lateral flux magnetic rod c Proximity identification system with lateral flux magnetic rod c

1988-06-08

1989-12-19

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235380, G06K 768

Patent

active

048884740

ABSTRACT:
A reader section has an oscillator for providing a power signal to a reader antenna. The reader antenna is constructed of a ferromagentic rod having primary and secondary windings. The primary windings are concentrated near the end of the ferromagnetic rod. A transformer is connected to the oscillator and the reader antenna and separates the power signal from an identifier signal. An identifier section has an identifier antenna which is constructed of a ferromagnetic rod having wire windings. An identifier circuit is connected to the identifier antenna for receiving the power signal and for transmitting a unique identifier signal.

REFERENCES:
patent: 4630044 (1986-12-01), Polzer
patent: 4729449 (1988-03-01), Holmquist

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