Patent ID: 7528721
Filing Date: 2009-05-05
Classification: G01S,G06K

Abstract:
1. A method of identification and location of articles provided with RFID tags located in a plurality of interrogation zones with a reader, comprising: selecting location and coordinates of a first interrogation zone of said plurality of interrogation zones by said reader; selecting dimensions of said first interrogation zone; dividing said first interrogation zone into a plurality of tag interrogation zones: transmitting tag activation signals from a plurality of transmission antennas from a selected groups of said antennas and a number of antennas in each group of said groups of said antennas to tags located in a selected tag interrogation zone; selecting a sequence of continuing activation of said tags in said selected tag interrogation zones; selecting a start point of scanning of said selected tag interrogation zone by said reader; calculating signal parameters for activation of said tags for each tag interrogation zone in said tag interrogation zones by each group of antennas of said groups of antennas depending on location of said selected tan interrogation zone, activation signal power and width of said tag activation signals required to activate said tans in each one of said plurality of tag interrogation zones; calculating time required for scanning said each one of said tag interrogation zones by said reader; creating signals for activating selected RFID tags in accordance with calculated signal parameters for said tag interrogation zone and each one of said antennas; transmitting sequence of activation signals by transmitting separate signal by each one of said antennas and said each group of antennas for activating said selected RFID tags in said tag interrogation zone; calculating time lapse between beginning of signal transmission for activating said selected RFID tags from a first group of said antennas and a selected present time coinciding with an end of signal transmission from a last antenna of said group of antennas assigned for activation of said selected REID tars; comparing said time lapse with time of scanning in said tag interrogation zone; shifting to another selected tau interrogation zone location when said time lapse is more tan said time of scanning of said tag interrogation zone; receiving said activation signals for said selected RFID tags in said tag interrogation zone; processing said activation signals for activating said selected RFID tags in said tag interrogation zone and making a selected tag to be activated; transmitting a signal information from a transponder of an activated tag, receiving said signal information including tag information by said reader; processing said signal information by said reader and reading said tag information; creating a tag data consisting of tag coordinates, an electronic code, description of product whereon said tag is provided, and tag information data; entering said tag information data in a RFID reader memory; repeating above steps until scanning of each said tag interrogation zone has been completely accomplished; organizing, storing and monitoring tag data including coordinates, electronic codes, description of articles bearing said tags, graphic view of said articles, security and service information data.