Wireless tag reading apparatus
    1.
    发明授权

    公开(公告)号:US10776590B2

    公开(公告)日:2020-09-15

    申请号:US16575727

    申请日:2019-09-19

    发明人: Seiya Kishimoto

    IPC分类号: G06K7/08 G06K7/10

    摘要: A wireless tag reading apparatus includes an antenna, an actuator, a phase detector, and a processor. The actuator is configured to move the antenna along a predetermined effective detection region. The processor is configured to calculate a first phase difference based on a phase of a response wave signal received by the antenna at a first plurality of antenna positions, and a second phase difference based on the phase of the response wave signal received by the antenna at a second plurality of antenna positions. The processor is configured to calculate first and second incident angles of the response wave signal for the antenna at the first and second plurality of antenna positions, respectively, based on the first and second phase differences, respectively. The processor is configured to determine whether or not the wireless tag is in the predetermined effective detection region based on the first and second incident angles.