Patent ID: 11907795
Assignee: TOSHIBA TEC KABUSHIKI KAISHA
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A method for controlling a wireless tag communication device by a computer, the wireless tag communication device including an antenna configured to transmit a carrier wave and receive a response wave output from a wireless tag with respect to the carrier wave, and configured to specify a position of the wireless tag to be searched based on a radio wave intensity of the response wave received by the antenna, the method comprising:
switching, by a radio wave controller, the carrier wave between a first carrier wave to be transmitted in a first polarization direction and a second carrier wave to be transmitted in a second polarization direction;
comparing, by a comparator, a radio wave intensity of a first response wave output by the wireless tag with respect to the first carrier wave and a radio wave intensity of a second response wave output by the wireless tag with respect to the second carrier wave; and
switching, by the radio wave controller, the carrier wave between the first carrier wave and the second carrier wave based on a comparison result of the comparator;
setting, by the radio wave controller, an output mode of the carrier wave transmitted from the antenna to a dual polarization mode, in which the first carrier wave and the second carrier wave are alternately transmitted, or to a single polarization mode in which only one of the first carrier wave and the second carrier wave is transmitted;
switching, by the radio wave controller, the output mode to the dual polarization mode when the antenna does not receive the response wave in the single polarization mode;
receiving, by a receiver, identification information that identifies the wireless tag to be searched; and
setting, by the radio wave controller, the output mode to the single polarization mode when a search for the wireless tag identified by the identification information received by the receiver is started.