WIRELESS TAG READER/WRITER AND COMMUNICATION METHOD FOR USE IN WIRELESS TAG READER/WRITERS
First Claim
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1. A wireless tag reader/writer comprising:
- a plurality of communication antennas arranged in a direction in which wireless tags pass and configured to transmit and receive signals to and from the wireless tags; and
a wireless tag reader/writer main unit configured to process signals to transmit to the wireless tags and signals received from the wireless tags,wherein the wireless tag reader/writer main unit changes the intensity of the electric waves radiated from the communication antennas which are provided at the entrance or exit of a passage of wireless tags, thereby selecting a wireless tag with which the wireless tag reader/writer is to communicate.
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Abstract
A wireless tag reader/writer comprises a plurality of communication antennas and a wireless tag reader/writer main unit. The communication antennas are arranged in a direction in which wireless tags pass and configured to transmit and receive signals to and from the wireless tags. The wireless tag reader/writer main unit processes signals to transmit to the wireless tags and signals received from the wireless tags. The wireless tag reader/writer unit changes the intensity of the electric waves to be radiated from the communication antennas, thereby selecting a wireless tag with which the wireless tag reader/writer is to communicate.
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Citations
11 Claims
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1. A wireless tag reader/writer comprising:
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a plurality of communication antennas arranged in a direction in which wireless tags pass and configured to transmit and receive signals to and from the wireless tags; and a wireless tag reader/writer main unit configured to process signals to transmit to the wireless tags and signals received from the wireless tags, wherein the wireless tag reader/writer main unit changes the intensity of the electric waves radiated from the communication antennas which are provided at the entrance or exit of a passage of wireless tags, thereby selecting a wireless tag with which the wireless tag reader/writer is to communicate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communication method for use in a wireless tag reader/writer having a plurality of communication antennas arranged in a direction in which wireless tags pass and configured to transmit and receive signals to and from the wireless tags, comprising:
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radiating electric waves of a first intensity from the communication antennas which are provided at the entrance or exit of a passage of wireless tags; radiating electric waves of a second intensity from the communication antennas which are provided at the entrance or exit of a passage of wireless tags, the second intensity being different from the first intensity; and selecting a wireless tag with which the wireless tag reader/writer is to communicate, in accordance with communication results.
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11. A communication method for use in a wireless tag reader/writer having a plurality of communication antennas arranged in a direction in which wireless tags pass and configured to transmit and receive signals to and from the wireless tags, comprising:
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radiating electric waves of a first intensity from the communication antennas which are provided at the entrance or exit of a passage of wireless tags; determining existence of wireless tags; radiating electric waves of a second intensity from the communication antennas which are provided at the entrance or exit of a passage of wireless tags, the second intensity being lower than the first intensity; and selecting a wireless tag with which the wireless tag reader/writer is to communicate, in accordance with communication results.
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Specification