ALARM SYSTEMS, WIRELESS ALARM DEVICES, AND ARTICLE SECURITY METHODS
First Claim
1. An electronic article surveillance (EAS) device for preventing theft comprising:
- an (EAS) tag configured to detect a resonance frequency received from a base station;
receive logic configured to receive a radio frequency (RF) input signal from the EAS tag and to create a modified signal with resonant pulses, wherein the resonant pulses indicate when the input signal is at the resonant frequency of the EAS tag;
compare logic configured to compare at least the resonant pulses of the modified signal with a predetermined signal pattern to determine when the modified signal corresponds to a signal transmitted by the base station; and
an alarm circuit configured to generate at least an audible alarm based, at least in part, on when the modified signal corresponds to the signal transmitted by the base station as determined by the compare logic.
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Accused Products
Abstract
Alarm systems, wireless alarm devices, and article security methods are described according to some aspects of the disclosure. In one aspect, an alarm system includes a base communication device, a remote communication device configured to communicate with the base communication device, wherein the remote communication device is adapted to be associated with an article to be secured and wherein the remote communication device comprises alarm circuitry, and wherein the remote communication device is configured to generate a reference signal comprising a plurality of identifiable components corresponding to communications intermediate the base communication device and the remote communication device and to control the alarm circuitry to generate a human perceptible alarm responsive to detection of the presence of the plurality of identifiable components in the reference signal.
68 Citations
20 Claims
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1. An electronic article surveillance (EAS) device for preventing theft comprising:
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an (EAS) tag configured to detect a resonance frequency received from a base station; receive logic configured to receive a radio frequency (RF) input signal from the EAS tag and to create a modified signal with resonant pulses, wherein the resonant pulses indicate when the input signal is at the resonant frequency of the EAS tag; compare logic configured to compare at least the resonant pulses of the modified signal with a predetermined signal pattern to determine when the modified signal corresponds to a signal transmitted by the base station; and an alarm circuit configured to generate at least an audible alarm based, at least in part, on when the modified signal corresponds to the signal transmitted by the base station as determined by the compare logic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of electronic security comprising:
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determining when an electronic article surveillance (EAS) tag is receiving an input signal at a resonant frequency of the EAS tag; generating a modified signal indicating when the EAS tag is receiving the input signal at the resonant frequency; comparing the modified signal to a predetermined transmission pattern of a base station to detect when the modified signal and predetermined pattern match; and sounding at least an audible alarm when the modified signal and predetermined pattern match. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification