Radio frequency identification device
First Claim
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1. A radio frequency identification (RFID) device, comprising:
- a detector transmitting a time slot cycle signal, wherein each of said time slot cycle signal is divided into several time slots; and
a plurality of tags receiving said time slot cycle signal, and responding to said detector in different time slot in each of said time slot cycle signal.
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Abstract
The present invention provides a radio frequency identification (RFID) device including a detector and several identification tags. The detector transmits time slot cycle signals, and each of the cycle signals is divided into several slots. The identification tags receive the time slot cycle signal, and each of the tags respectively contains a random generator to generate a random number. Individual identification tag responds to the detector in an assigned time slot corresponding to a random number generated by the random generator in each single time slot cycle.
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Citations
15 Claims
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1. A radio frequency identification (RFID) device, comprising:
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a detector transmitting a time slot cycle signal, wherein each of said time slot cycle signal is divided into several time slots; and
a plurality of tags receiving said time slot cycle signal, and responding to said detector in different time slot in each of said time slot cycle signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radio frequency identification (RFID) device, comprising:
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a detector transmitting a time slot cycle signal, wherein each of said time slot cycle signal is divided into several time slots; and
a plurality of tags receiving said time slot cycle signal, and each of said plurality of tags respectively containing a random generator to generate a random number, wherein individual of said plurality of tags responds to said detector in assigned time slot corresponding to said random number in each of said time slot cycle signal, and said tag generates different random number in different time slot cycle. - View Dependent Claims (8, 9, 10)
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11. A method for a detector identifying tags with the same identification code in a radio frequency identification (RFID) device, comprising:
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transmitting a continuous time slot cycle signal, wherein each of said time slot cycle is divided into several time slots;
detecting all responses form tags in the detection range, wherein said responses are in different time slots; and
counting the number of responses from said tags and comparing with a predetermined threshold to confirm the existence of said tags. - View Dependent Claims (12, 13, 14, 15)
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Specification