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    • 55. 发明授权
    • Dual use RFID/EAS device
    • 双重使用RFID / EAS设备
    • US08633821B2
    • 2014-01-21
    • US11949112
    • 2007-12-03
    • Ian J. Forster
    • Ian J. Forster
    • H04Q5/22G08B13/14
    • G06K19/07749G06K19/0723G06K19/07767G08B13/2417G08B13/2431G08B13/2448G08B13/2477
    • A radio frequency identification (RFID) device has multiple modes of operation. One of the modes of operation is an electronic article surveillance (EAS) mode, which is used to allow use of the RFID device as an EAS device. Another mode of operation is an RFID mode, which allows normal function of the RFID device in RFID communications. The EAS mode has greater sensitivity than the RFID mode, requires less power than the RFID mode to operate the device, and requires less current and/or voltage for operation. The EAS mode may achieve these different characteristics by one or more of: switching off some digital blocks in the circuitry of the RFID device; reducing power storage required to respond to incoming signals; reducing the length of response to incoming signals; reducing modulation required for a response; changing chip input impedance; and having multiple chip ports with different impedances.
    • 射频识别(RFID)设备具有多种操作模式。 操作模式之一是电子物品监视(EAS)模式,用于允许使用RFID设备作为EAS设备。 另一种操作模式是RFID模式,其允许RFID设备在RFID通信中的正常功能。 EAS模式具有比RFID模式更高的灵敏度,需要比RFID模式更少的功率来操作设备,并且需要更少的电流和/或电压进行操作。 EAS模式可以通过以下中的一个或多个实现这些不同的特性:关闭RFID设备的电路中的一些数字块; 减少响应输入信号所需的电力存储; 减少对输入信号的响应长度; 减少响应所需的调制; 切换输入阻抗; 并具有多个具有不同阻抗的芯片端口。
    • 58. 发明授权
    • Device and process for magnetic material detection in electronic article surveillance (EAS) electromagnetic systems
    • 电子物品监控(EAS)电磁系统中磁性材料检测的设备和工艺
    • US07969312B2
    • 2011-06-28
    • US12281873
    • 2007-03-06
    • Jorge José Gouveia Abrunhosa
    • Jorge José Gouveia Abrunhosa
    • G08B13/14G08B13/24G08B13/18
    • G08B13/2477G01V3/38G01V15/00G08B13/2408G08B13/248
    • The present invention relates to a device with its related electronic circuit and to a detection process targeted to detect any magnetic material moving around the antennas/sensors used in Electronic Article Surveillance (EAS) electromagnetic systems, which can be internally or externally coupled to these kind of anti-theft systems, significantly decreasing its current vulnerability to fraud since the current EAS electromagnetic systems are vulnerable for not being able to detect magnetic materials. The present process and detector device filter and treat the DC signal generated by the displacement of a magnetic material around one or more EAS electromagnetic system antenna/sensor(s). Magnetic material detection is achieved from a differential signal existing in the antenna/sensor receiver, such signal being forwarded to a control unit wherein there are coupled a device comprising a “n” order filter, a buffer, a sensitivity control circuit, a control logic and an alarm module.
    • 本发明涉及一种具有其相关电子电路和检测过程的设备,该检测过程旨在检测在电子物品监视(EAS)电磁系统中使用的天线/传感器周围移动的任何磁性物质,其可以内部或外部耦合到这些类型 的防盗系统,显着降低其目前的欺诈脆弱性,因为目前的EAS电磁系统由于无法检测到磁性材料而易受攻击。 本发明的过程和检测器装置对由一个或多个EAS电磁系统天线/传感器周围的磁性材料的位移产生的DC信号进行滤波和处理。 通过天线/传感器接收器中存在的差分信号实现磁性材料检测,这种信号被转发到控制单元,其中耦合包括“n”级滤波器,缓冲器,灵敏度控制电路,控制逻辑 和报警模块。