System and method for inhibiting detection of deactivated labels using detection filters having an adaptive threshold
First Claim
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 signal detection information and signal deactivation information;
extracting the signal detection information from the received signal, the received signal detection information including a signal detection energy value;
extracting the signal deactivation information from the received signal, the received signal deactivation 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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Accused Products
Abstract
A method, system and computer program product for inhibiting detection of deactivated tags. The method, system and computer program product include receiving a signal that includes environment noise from at least one tag, extracting signal detection information that includes a signal detection energy value from the received signal, extracting signal deactivation information that includes a signal deactivation energy value from the received signal, and determining a failure to deactivate ratio that corresponds to the signal detection energy value divided by the signal deactivation energy value. Generation of an alarm event is inhibited upon the failure to deactivate ratio being less than the selectable threshold and generating a noise factor to adjust a selectable threshold.
22 Citations
20 Claims
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1. A method for inhibiting detection of deactivated electronic article surveillance tags, the method comprising:
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receiving a signal from at least one tag, the signal including signal detection information and signal deactivation information; extracting the signal detection information from the received signal, the received signal detection information including a signal detection energy value; extracting the signal deactivation information from the received signal, the received signal deactivation 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for inhibiting detection of deactivated tags, the system comprising:
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a receiver, the receiver receiving a signal from at least one tag, the received signal including signal detection information and signal deactivation information; a detection frequency filter, the detection frequency filter extracting the signal detection information from the received signal, the received signal detection information including a signal detection energy value; a deactivation frequency filter, the deactivation frequency filter extracting signal deactivation information from the received signal, the received signal deactivation information including a signal deactivation energy value; and a processor, the processor operating to; determine 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 inhibit generation of an alarm event conditioned upon the failure to deactivate ratio being less than a selectable threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer program product comprising a non-transitory computer usable medium having a computer readable program for a security system which when executed on a computer causes the computer to perform a method comprising:
receiving a signal from at least one tag, the signal including signal detection information and signal deactivation information;
extracting the 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 deactivation 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.- View Dependent Claims (20)
Specification