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    • 61. 发明申请
    • SIGNAL CANCELLING TRANSMIT/RECEIVE MULTI-LOOP ANTENNA FOR A RADIO FREQUENCY IDENTIFICATION READER
    • 信号取消发射/接收无线电频率识别读取器的多环天线
    • US20110210824A1
    • 2011-09-01
    • US12939099
    • 2010-11-03
    • Robert Stewart
    • Robert Stewart
    • H04Q5/22
    • H01Q1/00G06K7/0008G06K7/10346H01Q1/2216H01Q7/00
    • In an inductively coupled radio frequency identification (RFID) system deployed in animal and livestock applications, reading system efficacy can be compromised by animal movement on, around, or near metal structures prone to producing sonic frequencies. Such is the case, for example, when a walk-by antenna is mounted at the entry door of a livestock transport trader, and animals transit on a metallic ramp and metallic trader floor. Associated with the observable acoustic noise are subtle disturbances in the magnetic field surrounding the antenna due to vibrating metal altering the reluctance of the antenna's magnetic field. This acoustic noise manifests itself as an electrical noise phenomenon that interferes with the signals of certain types of identification tags which rely on amplitude modulation. The detrimental effects of acoustic noise from metal structures can be mitigated by using a multi-loop antenna that limits the spatial distribution of the transmitted magnetic field and cancels close by magnetic field disturbances.
    • 在动态和家畜应用中的电感耦合射频识别(RFID)系统中,阅读系统的功效可能会受到容易产生声音频率的金属结构,附近或附近的动物运动的影响。 就是这样的情况,例如,当一个步行天线安装在一个牲畜运输商的门口时,动物在金属斜坡和金属商店的地板上过境。 与可观察到的声学噪声相关联是由于振动金属改变天线磁场的磁阻而在天线周围的磁场中的微小干扰。 这种声音噪声本身表现为电噪声现象,其干扰依赖于幅度调制的某些类型的识别标签的信号。 可以通过使用限制发射磁场的空间分布并通过磁场干扰来抵消的多环天线来减轻来自金属结构的声学噪声的有害影响。
    • 63. 发明申请
    • COMBINATION FULL-DUPLEX AND HALF-DUPLEX ELECTRONIC IDENTIFICATION TAG
    • 组合全双工和双工双电子标识
    • US20100052869A1
    • 2010-03-04
    • US12554743
    • 2009-09-04
    • Robert Stewart
    • Robert Stewart
    • G06K7/01H01L23/52G06K19/077
    • G06K19/0723G06K19/0709G06K19/0712G06K19/0726
    • Transponders are disclosed that are configurable to operate in an HDX mode and/or an FDX-B mode and that use a switchable load impedance across the transponders' resonant antenna circuit to induce amplitude and/or frequency modulation. An RF level detection circuit determines when the instantaneous activation signal strength is sufficient to support monoplex, multiplex, and diplex operation. A non-volatile memory stores identification data coded in HDX and FDX-B formats. One embodiment of the invention includes an inductive antenna including two terminals connected to tag circuitry, where the inductive antenna forms a resonant antenna circuit tuned to resonate at the frequency of the activation signal. In addition, the tag circuitry includes a non-volatile memory, the tag circuitry and the resonant antenna circuitry are configurable as an oscillator, the tag circuitry is configured to be powered by electric current induced in the resonant antenna circuit by the activation signal, the tag circuitry includes at least one switchable load impedance connected across the antenna resonant circuit, the tag circuitry is configurable to amplitude modulate the activation signal appearing at the resonant antenna circuit terminals using a switchable load impedance, and the tag circuitry is configurable to frequency shift key modulate the oscillator signal appearing at the resonant antenna circuit terminals using a switchable load impedance.
    • 公开了可配置为以HDX模式和/或FDX-B模式操作并且在转发器的谐振天线电路之间使用可切换负载阻抗以引起幅度和/或频率调制的转发器。 RF电平检测电路确定瞬时激活信号强度何时足以支持单重复用,多路复用和双工操作。 非易失性存储器存储以HDX和FDX-B格式编码的标识数据。 本发明的一个实施例包括感应天线,其包括连接到标签电路的两个终端,其中感应天线形成调谐为以激活信号的频率谐振的谐振天线电路。 此外,标签电路包括非易失性存储器,标签电路和谐振天线电路可配置为振荡器,标签电路被配置为由激励信号在谐振天线电路中感应的电流供电, 标签电路包括连接在天线谐振电路两端的至少一个可切换负载阻抗,标签电路可配置为使用可切换负载阻抗来振幅调制出现在谐振天线电路端子处的激活信号,并且标签电路可配置为频移键 使用可切换的负载阻抗来调制出现在谐振天线电路端子处的振荡器信号。
    • 66. 发明申请
    • Inductively coupled extension antenna for a radio frequency identification reader
    • 用于射频识别读取器的电感耦合扩展天线
    • US20090015383A1
    • 2009-01-15
    • US11825970
    • 2007-07-10
    • Robert Stewart
    • Robert Stewart
    • H04Q5/22H01Q1/38
    • H01Q1/2216G06K7/10178G06K7/10336H01Q7/08H04B5/0075H04B5/02
    • Systems and methods are described for adapting a portable RFID reader to create a portable RFID reader assembly that includes an extension antenna. In many embodiments, the extension antenna can be added to increase the reach of the portable RFID reader. The extension antenna is inductively coupled to the portable RFID reader and in many embodiments, the extension antenna is retrofit to an existing portable RFID reader. In other embodiments, a portable RFID reader and one or more extension antennas are produced as part of a set. One embodiment of the invention includes a reader having reader circuitry configured to generate an activation signal, a first antenna, where the first antenna is electrically connected to the reader circuitry, a reader housing containing the reader circuitry, an extension antenna including an elongated housing, a second antenna located at one end of the housing, and a third antenna located at the opposite end of the housing, where the second antenna is electrically connected to the third antenna. In addition, the first antenna and second antenna are inductively coupled.
    • 描述了用于适配便携式RFID读取器以创建包括扩展天线的便携式RFID读取器组件的系统和方法。 在许多实施例中,可以添加扩展天线以增加便携式RFID阅读器的范围。 扩展天线电感耦合到便携式RFID读取器,并且在许多实施例中,扩展天线被改造成现有的便携式RFID读取器。 在其他实施例中,便携式RFID读取器和一个或多个扩展天线被生成为一组的一部分。 本发明的一个实施例包括具有被配置为产生激活信号的读取器电路的读取器,第一天线,其中第一天线电连接到读取器电路,包含读取器电路的读取器壳体,包括细长壳体的延伸天线, 位于壳体的一端的第二天线和位于壳体的相对端的第三天线,其中第二天线电连接到第三天线。 此外,第一天线和第二天线感应耦合。
    • 67. 发明申请
    • Processing of seismic data using the S-transform
    • 使用S变换处理地震数据
    • US20070299613A1
    • 2007-12-27
    • US11798371
    • 2007-05-14
    • C. PinnegarRobert McGroryRobert Stewart
    • C. PinnegarRobert McGroryRobert Stewart
    • G01V1/00G06F3/14
    • G01V1/28
    • The present invention relates to a method and system for processing seismic data. Seismic data indicative of at least a time-dependent seismic trace are transformed into time-frequency domain using the S-transform. The transformed seismic data are processed for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency. Based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency seismic data indicative of a likelihood of a presence of hydrocarbons are then determined which are then graphically displayed. The method and system for processing seismic data provides a powerful tool for determining the likelihood of a presence of hydrocarbons based on a double peak hydrocarbon signature in the quotient of the instantaneous amplitude to the dominant instantaneous frequency.
    • 本发明涉及用于处理地震数据的方法和系统。 使用S变换将表示至少时间依赖的地震轨迹的地震数据变换成时频域。 经转换的地震数据被处理以在预定时间确定瞬时幅度和主要瞬时频率。 然后确定基于瞬时幅度与表示碳氢化合物存在的可能性的主要瞬时频率地震数据的商,然后以图形方式显示。 用于处理地震数据的方法和系统提供了一个强大的工具,用于确定基于瞬时幅度与主要瞬时频率的商的双峰碳氢化合物特征存在烃的可能性。