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SYSTEM AND METHOD FOR INHIBITING DETECTION OF DEACTIVATED LABELS USING DETECTION FILTERS HAVING AN ADAPTIVE THRESHOLD

  • US 20080303671A1
  • Filed: 10/31/2007
  • Published: 12/11/2008
  • Est. Priority Date: 06/08/2007
  • Status: Active Grant
First Claim
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1. A method for inhibiting detection of deactivated electronic article surveillance tags, the method comprising:

  • receiving a signal from at least one tag, the signal including environment noise;

    extracting signal detection information from the received signal, the received signal information including a signal detection energy value;

    extracting signal deactivation information from the received signal, the received signal information including a signal deactivation energy value;

    determining a failure to deactivate ratio, the failure to deactivate ratio corresponding to the signal detection energy value divided by the signal deactivation energy value; and

    inhibiting generation of an alarm event conditioned upon the failure to deactivate ratio being less than a selectable threshold.

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