Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-05-27
1997-02-18
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 34082544, 34082554, 3408253, 340505, G08B 1314
Patent
active
056044860
ABSTRACT:
An RF tagging system includes an RF tag (10, 30) and an RF tag reader 80. The RF tag includes a plurality of RF resonant circuits. Each RF resonant circuit is resonant at a given RF frequency. A group of decoder RF resonant circuits (12, 32) have resonant frequencies defining one of a plurality of predetermined decoding modalities. A group of data RF resonant circuits (14, 34) have resonant frequencies corresponding to a predetermined identification code when the resonant frequencies of the data RF resonant circuits are decoded in accordance with the one decoding modality. The RF tag reader detects the resonant frequencies of the decoder RF resonant circuits and determines the one decoding modality. The RF tag reader is operative in each of the plurality of predetermined decoding modalities, detects the resonant frequencies of the group of data RF resonant circuits, and decodes the resonant frequencies of the group of data RF resonant circuits in accordance with the one decoding modality to provide the identification code. The decoder RF resonant circuits may also indicate the number of data RF resonant circuits on the RF tag. The RF tag reader determines the predetermined number from the decoder RF resonant circuits to confirm the accurate detection of the data RF resonant circuits. The RF tag reader, when selecting a decoding modality in accordance with the detected resonant frequencies of the decoder RF resonant circuits, determines various frequency bands and alters the RF tag reader frequency detection operation for accurate detection of the data RF resonant circuits.
REFERENCES:
patent: 3671721 (1972-06-01), Hunn et al.
patent: 4023167 (1977-05-01), Wahlstrom
patent: 4114140 (1978-09-01), Kubina
patent: 4679154 (1987-07-01), Blanford
patent: 4940116 (1990-07-01), O'Connor
patent: 4959530 (1990-09-01), O'Connor
patent: 5036308 (1991-07-01), Fockens
patent: 5119070 (1992-06-01), Matsumoto et al.
patent: 5151684 (1992-09-01), Johnsen
patent: 5179270 (1993-01-01), Taussig
patent: 5237620 (1993-08-01), Deaton
patent: 5239167 (1993-08-01), Kipp
patent: 5393965 (1995-02-01), Bravman
Ghaem Sanjar
Istvan Rudyard L.
Lauro George L.
Hofsass Jeffery
Melamed Phillip H.
Motorola Inc.
Wong Albert K.
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