Personal identification system
First Claim
Patent Images
1. A user interface node for a personal identification system comprising:
- an enclosure having an open end, an exterior and an interior;
first RF attenuation material affixed to said interior of said enclosure;
second RF attenuation material affixed to said open end of said enclosure, said second RF attenuation material being in a strip curtain form to allow insertion of an object into said enclosure;
an antenna mounted in said interior of said enclosure for receiving a radio frequency signal from said object inside said enclosure;
a user of said personal identification system, said user having a personal detector unit for transmitting a coded radio frequency signal, said personal detector unit attached to said user, said personal detector unit being inserted through said second RF attenuation material into said interior of said enclosure; and
a receiver for receiving said coded radio frequency signal of said user'"'"'s personal detector unit, said receiver coupled to said antenna and to said personal detector unit by said radio frequency signal.
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Abstract
A personal identification system includes a number of antenna preamplifier nodes coupled to collection nodes which are in turn coupled to a central computer. A personal detector unit attached to a user is inserted into an enclosure of the antenna preamplifier node. The antenna preamplifier node is electrically isolated by RF attenuation material. An antenna of the antenna preamplifier node is a low gain antenna. The antenna preamplifier node reads a coded radio frequency signal of a personal detector unit inserted into an enclosure and rejects signals of other various personal detector units in the vicinity.
285 Citations
20 Claims
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1. A user interface node for a personal identification system comprising:
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an enclosure having an open end, an exterior and an interior; first RF attenuation material affixed to said interior of said enclosure; second RF attenuation material affixed to said open end of said enclosure, said second RF attenuation material being in a strip curtain form to allow insertion of an object into said enclosure; an antenna mounted in said interior of said enclosure for receiving a radio frequency signal from said object inside said enclosure; a user of said personal identification system, said user having a personal detector unit for transmitting a coded radio frequency signal, said personal detector unit attached to said user, said personal detector unit being inserted through said second RF attenuation material into said interior of said enclosure; and a receiver for receiving said coded radio frequency signal of said user'"'"'s personal detector unit, said receiver coupled to said antenna and to said personal detector unit by said radio frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A personal identification system for uniquely detecting the identity and location of a user comprising:
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a computer; at least one collection node for receiving a plurality of coded radio frequency signals, said at least one collection node coupled to said computer; at least one antenna preamplifier node for receiving said coded radio frequency signals from said user and transmitting said coded radio frequency signals to said at least one collection node, said at least one antenna preamplifier node coupled to said at least one collection node; and said at least one antenna preamplifier node including; an enclosure having an open end, an exterior and an interior; first RF attenuation material affixed to said interior of said enclosure; second RF attenuation material affixed to said open end of said enclosure, said second RF attenuation material being in a strip curtain form to allow insertion of an object into said enclosure; an antenna mounted in said interior of said enclosure for receiving a radio frequency signal from said object inside said enclosure; a user of said personal identification system, said user having a personal detector unit for transmitting a coded radio frequency signal, said personal detector unit attached to said user, said personal detector unit being inserted through said second RF attenuation material into said interior of said enclosure; and a receiver for receiving said coded radio frequency signal of said user'"'"'s personal detector unit, said receiver coupled to said antenna and to said personal detector unit by said radio frequency signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An enclosure for a personal identification system comprising:
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said enclosure having an interior and an open end; RF attenuation means attached to said interior and to said open end of said enclosure; a receiver for receiving coded radio frequency signals, said receiver mounted in said interior of said enclosure; and a personal detector unit attached to a user said personal detector unit for transmitting coded radio frequency signals to identify said user to said receiver when said personal detector unit is inserted into said interior of said enclosure.
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Specification