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    • 2. 发明申请
    • ROLLING CODE SECURITY SCHEME FOR TAG DETECTION ROBUSTNESS
    • 标签检测鲁棒性的滚动代码安全策略
    • WO2017192757A1
    • 2017-11-09
    • PCT/US2017/030897
    • 2017-05-03
    • TYCO FIRE & SECURITY GMBHSOTO, Manuel, A.PADULA, Guillermo, H.
    • SOTO, Manuel, A.PADULA, Guillermo, H.
    • G08B13/24
    • G08B13/246G08B13/2471G08B13/2488
    • System (100) and method (900) for detecting the presence of a security tag. The method involves performing operations by a master pedestal of an EAS system to determine a first Tx/Rx scheme to be used during a first iteration of an EAS tag detection process based on (A) a first total number of time windows randomly selected from a plurality of total number of time windows in which an EAS exciter signal should be transmitted from at least one pedestal, and (B) first time windows randomly selected from a plurality of time windows in which the EAS exciter signal can be sent during the EAS tag detection process. Information specifying the first Tx/Rx scheme is communicated from the master pedestal to at least one slave pedestal. Transmit and receive operations are performed by the master and slave pedestals in accordance with the first Tx/Rx scheme.
    • 用于检测安全标签的存在的系统(100)和方法(900)。 该方法包括由EAS系统的主基架执行操作,以基于(A)从EAS系统中随机选择的第一总时间窗口来确定在EAS标签检测过程的第一次迭代期间要使用的第一Tx / Rx方案 其中EAS激励信号应该从至少一个基座发送的多个时间窗总数,以及(B)从EAS激励信号可以在EAS标记期间发送的多个时间窗中随机选择的第一时间窗 检测过程。 指定第一Tx / Rx方案的信息从主基座传送到至少一个从基座。 发送和接收操作由主机和从机底座根据第一个Tx / Rx方案执行。
    • 5. 发明申请
    • RADIO FREQUENCY DETECTION AND IDENTIFICATION SYSTEM
    • 无线电频率检测和识别系统
    • WO01086967A2
    • 2001-11-15
    • PCT/US2001/014463
    • 2001-05-04
    • H04B5/02G08B13/24H04B1/59H04Q
    • G08B13/2414G08B13/2417G08B13/2431G08B13/2448G08B13/2482G08B13/2488
    • A system (10) is disclosed for detecting the presence of an article. The system (10) includes a transmitter (12) for radiating a first electromagnetic signal at a predetermined primary frequency and a resonant tag (20) secured to the article. The resonant tag generates a second electromagnetic signal in response to receiving the first electromagnetic signal. The second electromagnetic signal has components at the primary frequency and at a predetermined secondary frequency different from the primary frequency. The system also includes a receiver (14) for receiving the second electromagnetic signal and a computer (46) connected to an output (48) of the receiver (14). The computer (46) processes the received second electromagnetic signal and generates an output signal when the secondary frequency is detected in the second electromagnetic signal.
    • 公开了用于检测物品的存在的系统(10)。 系统(10)包括用于以预定主频率辐射第一电磁信号的发射器(12)和固定到物品的谐振标签(20)。 响应于接收到第一电磁信号,谐振标签产生第二电磁信号。 第二电磁信号具有主频率和与主频率不同的预定次频的分量。 该系统还包括用于接收第二电磁信号的接收器(14)和连接到接收器(14)的输出端(48)的计算机(46)。 当在第二电磁信号中检测到次频时,计算机(46)处理所接收的第二电磁信号并产生输出信号。
    • 7. 发明申请
    • WIRELESS SYNCHRONIZATION OF PULSED MAGNETIC EAS SYSTEMS
    • 脉冲电磁系统的无线同步
    • WO00048148A2
    • 2000-08-17
    • PCT/US2000/000356
    • 2000-01-07
    • G08B13/24G08B
    • G08B13/2488
    • A method for wireless synchronization of first and second magnetic electronic article surveillance (EAS) systems arranged for operation in close proximity to one another, comprising the steps of: programming each of the first and second EAS systems for transmitting at least one unique signal into respective and partially overlapping interrogation zones of the first and second EAS systems and for receiving any signals from the interrogation zones at respective and predetermined transmit and receive phases relative to a common reference; transmitting a unique signal from the first EAS system; receiving and identifying the at least one unique signal at the second EAS system during one of the receiver phases; and, transmitting from the second EAS system synchronously with the transmitting from the first EAS system, responsive to the conveyed phase information.
    • 一种用于彼此靠近操作的第一和第二磁性电子物品监视(EAS)系统的无线同步的方法,包括以下步骤:对所述第一和第二EAS系统中的每一个进行编程,以将至少一个唯一信号发送到相应的 以及第一和第二EAS系统的部分重叠的询问区,并且用于在相对于公共参考的相应和预定的发射和接收阶段从所述询问区接收任何信号; 从第一EAS系统发送唯一信号; 在所述接收机阶段期间在所述第二EAS系统处接收和识别所述至少一个唯一信号; 并且响应于传送的相位信息,从第一EAS系统与第一EAS系统的发送同步发送。
    • 8. 发明申请
    • ELECTRONIC ARTICLE SURVEILLANCE SYSTEM WITH CANCELLATION OF INTERFERENCE SIGNALS
    • 电子文章监测系统消除干扰信号
    • WO1997046989A1
    • 1997-12-11
    • PCT/US1997/007959
    • 1997-05-09
    • SENSORMATIC ELECTRONICS CORPORATION
    • FREDERICK, Thomas, J.GOODRICH, StevenBETTINE, Dale, R.
    • G08B13/187
    • G08B13/2488G08B13/2471
    • An electronic article surveillance system (100) includes a signal generator (22, 24, 26) for generating an interrogation signal (28) in an interrogation zone (30), an antenna (36) which receives a signal (34) present in the interrogation zone (30), and circuitry for cancelling interference. A hybrid interference component cancelling loop forms a digital interference estimate signal (108) which is converted (106) into an analog estimate signal, which is subtracted (102) from an input analog signal (40). The difference signal is digitized and subjected to additional digital interference cancellation processes (108). Each of the signal processing operations (108) entails performing a polyphase decomposition of a digital input signal, estimating a mean value of each of the resulting subsequences, and combining the estimated mean values to form an interference component estimate signal. An input sample window for a comb-filtering stage is phase adjusted relative to the interrogation signal to compensate for changes in phase of the marker signal (34).
    • 电子物品监视系统(100)包括用于在询问区(30)中产生询问信号(28)的信号发生器(22,24,26),接收存在于所述询问区(30)中的信号(34)的天线 询问区(30)和消除干扰的电路。 混合干扰分量消除环形成数字干扰估计信号(108),其被转换(106)为模拟估计信号,其从输入模拟信号(40)中减去(102)。 差分信号被数字化并经受附加的数字干扰消除处理(108)。 每个信号处理操作(108)需要执行数字输入信号的多相分解,估计所得到的每个子序列的平均值,并组合估计的平均值以形成干扰分量估计信号。 用于梳状滤波级的输入采样窗口相对于询问信号进行相位调整,以补偿标记信号(34)的相位变化。
    • 9. 发明申请
    • BURGLARPROOF SYSTEM
    • BURGLARPROOF系统
    • WO1997008672A1
    • 1997-03-06
    • PCT/JP1996002397
    • 1996-08-27
    • MASPRO DENKOH CO., LTD.HAYASHI, Michinari
    • MASPRO DENKOH CO., LTD.
    • G08B13/24
    • G08B13/2488G08B13/2471
    • A burglarproof system improving a tagged article detecting accuracy. A signal of a predetermined amplitude obtained by sine-wave sweeping a range of 7.4 MHz-8.9 MHz by 140 Hz is sent out from a transmitting antenna (1). At a signal reception side, a signal analysis unit (9) is provided which is adapted to predict the time of generation of a signal, which is to be received in the second half cycle in one cycle of the sweeping, on the basis of the time of generation of the signal received in the first half cycle in the same one cycle, compare the predicted time with the reception signal, and recognize the passage of an article when the predicted time and reception signal have reverse-phase relation with each other.
    • 防盗系统提高了标签物品的检测精度。 从发射天线(1)发出通过扫描7.4MHz-8.9MHz×140Hz的范围的正弦波获得的预定振幅的信号。 在信号接收侧,提供信号分析单元(9),该信号分析单元(9)基于在扫描的一个周期中预测将在下一个半周期中接收的信号的生成时间 在相同的一个周期中生成在前半个周期中接收的信号的时间,将预测时间与接收信号进行比较,并且当预测的时间和接收信号彼此具有反相关系时,识别物品的通过。