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Systems and methods for displaying location information for RFID tags

  • US 9,872,135 B2
  • Filed: 12/31/2014
  • Issued: 01/16/2018
  • Est. Priority Date: 12/31/2014
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a radio frequency identifier (RFID) reader comprising at least one antenna;

    an imager configured to acquire images in a scanning area having an RFID tag;

    a controller configured to operate the at least one antenna to transmit interrogation signals while the RFID reader is moved to scan portions of the scanning area and, concurrently at each of a plurality of points during such movement, acquire;

    (1) location information indicating the portion within the scanning area being scanned, (2) a response, including phase, from any RFID tags within the portion of the scanning area being scanned, and (3) an image in the scanning area corresponding to the portion within the scanning area being scanned;

    a processor configured to determine a location of the RFID tag within the scanning area based on the phase of the RFID tag response and the acquired location information at each position of the RFID reader during scanning; and

    a display configured to display an image being only a portion of the scanning area corresponding to the location of the RFID tag within the scanning area.

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