摘要:
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 at a detection frequency from the received signal, extracting signal deactivation information that includes a signal deactivation energy value at a deactivation frequency 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 a selectable threshold. A noise factor is measured to adjust a selectable threshold.
摘要:
A method and system for generating alarms in a security system that include establishing a detection region, detecting a first event where the first event is one of (a) detecting a tag in the detection region and (b) detecting a person in the detection region, starting a timer upon detecting the first event, detecting a second event where the second event is the other one of (a) detecting a tag in the detection region and (b) detecting a person in the detection region and enabling an alarm output when the second event is detected prior to expiration of the timer. The method and system for generating alarms in a security system can further include setting a first event flag upon detecting the first event where the first event flag corresponds to the first event and setting a second event flag upon detecting the second event where the second event flag corresponds to the second event.
摘要:
Automatic synchronization of electronic article surveillance (EAS) systems operating in proximity to each other is provided. The system and method involves determining the source of a detected signal (1-11), and automatically adjusting the phase of a pulsed EAS transmitter (13-17) by amplitude sampling a received signal to detect the leading edge of an interfering transmit pulse, and calculating a corresponding delay for synchronizing the instant transmitter to the interfering transmitter. Detection of EAS tags placed too close to the EAS transmitter interrogation zone (20) is also provided. An alarm can be implemented to indicate detected EAS tags that are placed too close to the interrogation zone.
摘要:
A method, system and apparatus for managing power use in security systems, which include establishing a detection region, triggering a person detection event, the person detection event based on the detection of a person in the detection region, starting a timer upon triggering the person detection event, and transmitting a tag interrogation signal until the expiration of the timer. The method, system and apparatus can further include determining a relative direction of movement of the person.
摘要:
An antenna assembly is capable of being installed in a structure wherein the structure includes a covering and a substructure and the antenna assembly is configured with thin film materials to have a total thickness such that the antenna assembly can be disposed between the substructure and the covering. The antenna assembly may have a total thickness not greater than about 15 millimeters (mm), and may include at least one of a transmitter antenna, a transceiver antenna, and a receiver antenna. The receiver antenna may be configured as an air core antenna or a non-air core antenna. The receiver antenna may be configured as a non-air core receiver antenna in an internal compartment over or within a base insulating layer. The antenna assembly may be at least partially housed within a housing assembly of thin film materials so that both can be disposed between the substructure and the covering.
摘要:
Automatic synchronization of electronic article surveillance (EAS) systems operating in proximity to each other is provided. The system and method involves determining the source of a detected signal (1-11), and automatically adjusting the phase of a pulsed EAS transmitter (13-17) by amplitude sampling a received signal to detect the leading edge of an interfering transmit pulse, and calculating a corresponding delay for synchronizing the instant transmitter to the interfering transmitter. Detection of EAS tags placed too close to the EAS transmitter interrogation zone (20) is also provided. An alarm can be implemented to indicate detected EAS tags that are placed too close to the interrogation zone.