Electronic label detecting method for EAS

An electronic label and detection method technology, applied in the direction of electrical alarms, instruments, induction recording carriers, etc., can solve the problems of reducing the operability of the system, difficult to know the working status of the system, etc., so as to reduce the detection blind area and reduce the leakage of the system. The effect of reporting and reducing false positives

Inactive Publication Date: 2009-03-25
SHENZHEN RONGHUA ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional system cannot or is difficult to know the specific working status of the system and the detailed parameters of the alarm, thus reducing the operability of the system

Method used

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  • Electronic label detecting method for EAS
  • Electronic label detecting method for EAS
  • Electronic label detecting method for EAS

Examples

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Embodiment Construction

[0026] In this embodiment, four detection antennas are taken as an example for illustration. In practical applications, one detection antenna, two detection antennas or multiple detection antennas may be set according to the size and number of entrances and exits. Each detection antenna forms a monitoring area. When each detection antenna starts to work, it first emits electromagnetic waves and then receives them. The received signal enters the MCU for processing through the signal receiving channel, so each detection antenna becomes a channel.

[0027] Referring to Fig. 1, the commodity electronic anti-theft system includes a detection system and an electronic label arranged on the commodity, wherein the detection system includes an MCU 101 and a signal transmitting channel connected to the MCU 101, a signal receiving channel, an alarm device 110, a display device 111 and Keyboard 112; also includes several detection antennas 104, detection antennas 104 are arranged at the ent...

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Abstract

The invention discloses a method for detecting electronic tags for an EAS. The method comprises the following steps: setting the electronic tags on commodities and installing detecting antennae of the EAS in a monitoring area which is formed at a passageway, wherein when a commodity with an undeactivated electronic tag passes through the monitoring area at the passageway, the EAS can detect the electronic tag through the detecting antenna and generate an alarm signal, the number of the detection antenna is at least one, and all the antennae work by turns to scan the respective monitoring area. The scanning process of each detecting antenna comprises the following steps: sending out an electromagnetic wave once; receiving the electromagnetic wave twice; calculating out the characteristic values of the two signals and comparing the characteristic values; judging whether the received signal has only one extreme value by a satisfying strip, wherein if the received signal has only one extreme value, the received signal is accounted as a suspected given signal; and performing a plurality of times of detections and judgments on the passageway repeatedly to confirm whether the received signal is the given signal. The method can effectively reduce the misinformation, improve the detection rate and reduce underreports of a system.

Description

technical field [0001] The present invention relates to EAS (Electronic Anti-theft System for Merchandise), specifically an electronic label detection method for 58KHz EAS, and an EAS (Electronic Anti-theft System for Commodity) using the detection method. Background technique [0002] In the traditional article detection and protection system, a number of antennas are installed at the exit (entrance) of the shopping mall. A part of the antenna emits predetermined electromagnetic waves or radio waves, and a part of the antenna receives these energies, thus forming a surveillance area at the exit (entrance). When an unpaid item is taken away, the tag resonance circuit attached to the item senses the electric wave and resonates at the resonance point, causing an instantaneous change in the electric field, which is detected by the system and outputs an alarm. Furthermore, when the tag has been removed from the item, or has been deactivated using a dedicated deactivation device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/08G08B13/24
Inventor 陈新严甫
Owner SHENZHEN RONGHUA ELECTRONICS
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