Reader arrangement for an electronic identification system having a plurality of reader heads for energizing transponders
First Claim
1. A reader arrangement for an electronic identification system, the reader arrangement comprising a plurality of reader heads for energizing transponders to be read;
- and control means for time multiplexing activation of the reader heads, the activation being multiplexed by switching activation of the reader heads in a multi-phase sequential pattern including a first phase for activating a first set of the reader heads and at least one further phase for activating at least one further set of said reader heads, so that a complete cycle plus at least the first phase of a subsequent cycle is completed within a time period not longer than a reset period of the transponders, the reset period being the period between removal of an energizing signal from a transponder and the transponder re-entering a normal operational mode.
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Accused Products
Abstract
A reader arrangement 22 for an electronic identification system includes a plurality of reader heads 22.1 to 22.4 for energizing transponders 28.1 to 28.n to be read, and a controller 29 therefor. The controller 29 switches activation of the reader heads in a multi-phase sequential pattern including a first phase for activating a first set 22.1 and 22.3 of the reader heads and at least one further phase for activating a further set 22.2 and 22.4 of the reader heads. The switching is such that a complete cycle plus at least the first phase of a subsequent cycle is completed within a time period not longer than a reset period of the transponders. The reset period is the period between removal of an energizing signal from a transponder and the transponder re-entering a normal operational mode.
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Citations
11 Claims
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1. A reader arrangement for an electronic identification system, the reader arrangement comprising a plurality of reader heads for energizing transponders to be read;
- and control means for time multiplexing activation of the reader heads, the activation being multiplexed by switching activation of the reader heads in a multi-phase sequential pattern including a first phase for activating a first set of the reader heads and at least one further phase for activating at least one further set of said reader heads, so that a complete cycle plus at least the first phase of a subsequent cycle is completed within a time period not longer than a reset period of the transponders, the reset period being the period between removal of an energizing signal from a transponder and the transponder re-entering a normal operational mode.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification