Method and device for contactless trasmission of data from a number of data carriers, preferably in the form of RFID-tags
First Claim
1. A method for contactless transmission of data from a number of data or information carriers comprising:
- transmitting a polling signal by a reader via an antenna connected to the reader to one or more information carriers, reading out of information from an individual information carrier by receipt of an information signal transmitted by the one or more information carriers and received by an antenna, switching a read information carrier to “
silent”
or “
inactive”
once its information has been read out, and using at least two antennas to read out the number of information carriers, wherein;
the reader is connected alternately at time intervals in each case with another of the number of antennas, to send polling signals to information carriers and/or to receive information signals from the information carriers concerned, and if the connection between the reader and an antenna initially connected with the reader is broken, then simultaneously said antenna that has been disconnected from the reader is connected with at least one further energy source transmitter, in order to continue to supply the information carriers, which are in the energy field of this antenna and which have already been read out and/or switched to “
silent”
or “
inactive”
, with energy to maintain said state.
1 Assignment
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Accused Products
Abstract
Contactless transmission of data for a number of information carriers uses a reader connected alternately at time intervals with a number of antennas, to send polling signals to information carriers and/or to receive information signals from the information carriers. If the connection between the reader and an antenna initially connected with the reader is broken, then simultaneously this antenna that has been disconnected from the reader is connected with at least one further energy source transmitter, in order to continue to supply the information carriers that are in the energy field of this antenna and which have already been read out and/or switched to “silent” or “inactive” with energy to maintain this state.
20 Citations
26 Claims
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1. A method for contactless transmission of data from a number of data or information carriers comprising:
-
transmitting a polling signal by a reader via an antenna connected to the reader to one or more information carriers, reading out of information from an individual information carrier by receipt of an information signal transmitted by the one or more information carriers and received by an antenna, switching a read information carrier to “
silent”
or “
inactive”
once its information has been read out, andusing at least two antennas to read out the number of information carriers, wherein;
the reader is connected alternately at time intervals in each case with another of the number of antennas, to send polling signals to information carriers and/or to receive information signals from the information carriers concerned, and if the connection between the reader and an antenna initially connected with the reader is broken, then simultaneously said antenna that has been disconnected from the reader is connected with at least one further energy source transmitter, in order to continue to supply the information carriers, which are in the energy field of this antenna and which have already been read out and/or switched to “
silent”
or “
inactive”
, with energy to maintain said state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19, 20, 21, 22)
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12. A device for contactless transmission of data from a number of data or information carriers, preferably in the form of RFID tags, comprising:
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plural antennas, a reader connected or connectable to said antenna, via which polling signals can be sent to at least one information carrier, the information carrier, containing information, and which following receipt of an electromagnetic signal that serves as the power source, reads out corresponding information and sends this to an antenna for evaluation at the connected reader, a switch that switches said information carrier that has been read out to “
silent”
or “
inactive”
,a signal distribution device, the signal distribution device comprising at least two switching devices, the switching device connecting the reader for a specific, preferably cyclically repeating time phase with one of the plural antennas, the switching device connecting the reader with another of the plural antennas, an energy source transmitter, and the antenna, which following the switching of the reader to another antenna was last connected with the reader, is connected with the energy source transmitter, in order to maintain the information carriers located in the energy field of this antenna or these antennas and switched to the “
silent”
or “
inactive”
state in this state. - View Dependent Claims (13, 14, 15, 16, 17, 18, 23, 24, 25, 26)
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Specification