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公开(公告)号：US09430924B2
公开(公告)日：2016-08-30
申请号：US14400439
申请日：2012-05-18
申请人： Thomas Frederick
发明人： Thomas Frederick
CPC分类号： G08B13/2488 , G06K7/10009 , G06K7/10019 , G08B13/248 , H04B5/0062
摘要： An AC-coupled RFID system is disclosed. Embodiments of the invention statistically correlate the transmit data from a baseband transmit signal and the receive data in a receive signal after the signal has passed through a baseband receive filter. By using a receive bandpass or high-pass filter at baseband, the receiver can be AC-coupled in the baseband. This AC coupling significantly reduces cost and complexity by eliminating high-power reflected signals at and near DC. The high-pass corner frequency of the receive filter passes enough of the receive signal to still be measurable. The correlation is used to estimate the reflected carrier, which in turn enables cancellation of the carrier, improving RFID reader sensitivity.
摘要翻译： 公开了一种AC耦合RFID系统。 在信号通过基带接收滤波器之后，本发明的实施例将来自基带发射信号的发射数据和接收信号中的接收数据统一地相关。 通过在基带使用接收带通或高通滤波器，接收机可以在基带中交流耦合。 这种AC耦合通过消除DC附近和附近的大功率反射信号，显着降低了成本和复杂性。 接收滤波器的高通角频率足够接收信号仍然可测量。 相关性用于估计反射载波，从而使载波消除，从而提高RFID阅读器灵敏度。
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2.发明申请公开(公告)号：US20070026895A1
公开(公告)日：2007-02-01
申请号：US11194854
申请日：2005-08-01
申请人： Christopher Capece , Michael Crocker , Vincent DeRossi , Thomas Frederick , Michael Garyantes , Elizabeth Kujan , Behzad Mottahed , Max Solondz , Krishnamurthy Sreenath
发明人： Christopher Capece , Michael Crocker , Vincent DeRossi , Thomas Frederick , Michael Garyantes , Elizabeth Kujan , Behzad Mottahed , Max Solondz , Krishnamurthy Sreenath
CPC分类号： H04W88/08
摘要： A wireless communication system (20) includes a base station (22) that is capable of communicating with a plurality of mobile stations (24). The base station includes a modular device (50) that allows flexibility in locating the various operative electronic components (52, 54, 56, 58) of the base station. Disclosed examples include a radio frequency head module (55) that packages components traditionally associated and located with a radio in a manner that allows them to be located with the Tx and Rx portions of the radio or at a remote location. One example includes a radio frequency coupling for communications between the radio (54) and the radio frequency head module (55). Other examples include intermediate frequency couplings (70, 74).
摘要翻译： 无线通信系统（20）包括能够与多个移动台（24）进行通信的基站（22）。 基站包括模块化设备（50），其允许灵活地定位基站的各种可操作的电子部件（52,54,56,58）。 公开的示例包括射频头模块（55），其以传统上与无线电相关联并且以允许它们与无线电的Tx和Rx部分位于远程位置的方式封装组件。 一个示例包括用于无线电（54）和射频头模块（55）之间的通信的射频耦合。 其他示例包括中频耦合（70,74）。
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公开(公告)号：US20060220792A1
公开(公告)日：2006-10-05
申请号：US11370591
申请日：2006-03-07
申请人： Jeffrey Oakes , Thomas Frederick
发明人： Jeffrey Oakes , Thomas Frederick
IPC分类号： H04Q5/22
摘要： Adaptive transmission of a tag activation signal and detection of a tag. By monitoring the effects of a load on a tag activation signal, a signal analyzer adjusts the transmission waveform from which the signal is generated so that the next tag activation signal transmitted into the load more closely corresponds to a desired activation signal.
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公开(公告)号：US20050253721A1
公开(公告)日：2005-11-17
申请号：US11121899
申请日：2005-05-04
申请人： Richard Herring , Jeffrey Oakes , Thomas Frederick
发明人： Richard Herring , Jeffrey Oakes , Thomas Frederick
CPC分类号： G08B13/2408 , G08B13/2471 , G08B13/2477
摘要： A method for controlling signal decay of a transmitted signal within a transmitter is described. The method includes measuring an amount of current induced back into the transmitter by the decaying signal, and using the current measurement to control the decay of the signal after the signal is transmitted from the load. A transmitter for an electronic article surveillance (EAS) system is also described which includes a current sensing circuit configured to at least sense an amount of current induced back into the transmitter by the load after transmission of the signal, and a transmitter control circuit configured to utilize the sensed current to determine an amount and a polarity of current to be applied to the load to reduce the induced current to a desired value.
摘要翻译： 描述了用于控制发射机内的发射信号的信号衰减的方法。 该方法包括测量由衰减信号引回到发射机中的电流量，并且使用电流测量来控制在从负载发送信号之后信号的衰减。 还描述了一种用于电子物品监视（EAS）系统的发射机，其包括电流感测电路，其被配置为至少感测在传输信号之后由负载引回到发射机的电流量;以及发射机控制电路，被配置为 利用感测的电流来确定要施加到负载的电流的量和极性，以将感应电流减小到期望值。
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5.发明申请Methods and apparatus for arbitrary antenna phasing in an electronic article surveillance system 有权电子物品监控系统中任意天线定相的方法和装置公开(公告)号：US20050253720A1
公开(公告)日：2005-11-17
申请号：US11121898
申请日：2005-05-04
申请人： Jeffrey Oakes , Thomas Frederick , Richard Herring
发明人： Jeffrey Oakes , Thomas Frederick , Richard Herring
CPC分类号： G08B13/2477 , G08B13/2471 , G08B13/2474
摘要： A method for controlling electronic article surveillance (EAS) transmissions is described. The method includes calculating system parameters associated with one or more of a desired frequency, a desired duty cycle, and a desired phase difference between antennas for a transmitter, and initializing a counter with a value based on the system parameters. The method also includes comparing a count from the counter to the system parameters, and modulating EAS transmission signals based on the comparison between the count and the system parameters. An EAS transmitter and an EAS system are also described.
摘要翻译： 描述了一种用于控制电子物品监视（EAS）传输的方法。 该方法包括计算与发射机的天线之间的期望频率，期望占空比和期望相位差中的一个或多个相关联的系统参数，以及基于系统参数用值初始化计数器。 该方法还包括将来自计数器的计数与系统参数进行比较，以及基于计数和系统参数之间的比较来调制EAS传输信号。 还描述了EAS发射机和EAS系统。
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6.发明申请公开(公告)号：US20050253719A1
公开(公告)日：2005-11-17
申请号：US11121897
申请日：2005-05-04
申请人： Thomas Frederick , Richard Herring , Jeffrey Oakes
发明人： Thomas Frederick , Richard Herring , Jeffrey Oakes
CPC分类号： G08B13/2477 , G08B13/2408 , G08B13/2471
摘要： A method for controlling operation of a transmitter in an electronic article surveillance (EAS) system is described that includes coupling each of a plurality of transmit channels to a corresponding antenna, configuring a modulator within each transmit channel to output a modulated signal to the corresponding antenna, providing feedback of each modulated signal, and adjusting operation of each modulator based on the feedback. An EAS transmitter and an EAS system are also described.
摘要翻译： 描述了一种用于控制电子物品监视（EAS）系统中的发射机的操作的方法，其包括将多个发射信道中的每一个耦合到对应的天线，在每个发射信道内配置调制器以将调制信号输出到相应的天线 ，提供每个调制信号的反馈，以及基于反馈来调整每个调制器的操作。 还描述了EAS发射机和EAS系统。
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7.发明授权Intelligent power pack assisted pedestal tuning for electronic article surveillance 有权用于电子物品监控的智能电源组辅助基座调谐公开(公告)号：US06862719B2
公开(公告)日：2005-03-01
申请号：US10108205
申请日：2002-03-26
申请人： Steven Embling , Michael A. Zampini , William Jeffreys , Thomas Frederick , Ronald Alterio , Fadi E. Ayoub
发明人： Steven Embling , Michael A. Zampini , William Jeffreys , Thomas Frederick , Ronald Alterio , Fadi E. Ayoub
CPC分类号： H01Q1/2208 , G08B13/2471 , H01Q1/22 , H01Q7/005
摘要： Automatic tuning of an EAS antenna pedestal without the use of special tools or advanced training is provided. The capacitance of the antenna circuit is adjusted to tune the resonant frequency to the desired frequency. Measurement of the current level is used to validate that the antenna is resonant at the desired frequency. If the current level indicates that the antenna is not resonant at the specified frequency, LEDs located on a capacitor tuning board light to indicate where jumpers should be placed to add or remove capacitance from the circuit. Alternately, the capacitance values can be electronically added or removed from the circuit.
摘要翻译： 提供了不使用专用工具或高级培训的EAS天线底座的自动调谐。 调整天线电路的电容以将谐振频率调谐到期望的频率。 电流电平的测量用于验证天线是否以所需的频率谐振。 如果当前电平表示天线没有以指定频率谐振，则位于电容调谐板上的LED指示灯将亮起，以指示哪些跳线应放置在电路中添加或移除电容。 或者，可以从电路中电子地添加或去除电容值。
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公开(公告)号：US20050079038A1
公开(公告)日：2005-04-14
申请号：US10684792
申请日：2003-10-14
申请人： James Vlaanderen , Thomas Frederick
发明人： James Vlaanderen , Thomas Frederick
摘要： A transporter and storage and lift unit, particular suited for tires includes an elongated vehicle frame capable of traveling over the underlying terrain includes a plurality of elongated object supports. Pairs of parallelogram linkages are provided for each of the object supports so as to mount them for movement between transport and/or storage positions overlying the frame and positions substantially engaging the underlying terrain for the addition of or removal of tire to or from the supports.
摘要翻译： 特别适用于轮胎的运输机和存储和提升单元包括能够在下面的地面上行进的细长车辆框架，其包括多个细长的物体支撑件。 为每个物体支撑件提供一对平行四边形连杆，以便安装它们以便在覆盖框架的运输和/或存储位置之间移动，并且基本上与下面的地形接合，以便将轮胎添加到或从支架移除。
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公开(公告)号：US20150130594A1
公开(公告)日：2015-05-14
申请号：US14400439
申请日：2012-05-18
申请人： Thomas Frederick
发明人： Thomas Frederick
CPC分类号： G08B13/2488 , G06K7/10009 , G06K7/10019 , G08B13/248 , H04B5/0062
摘要： An AC-coupled RFID system is disclosed. Embodiments of the invention statistically correlate the transmit data from a baseband transmit signal and the receive data in a receive signal after the signal has passed through a baseband receive filter. By using a receive bandpass or high-pass filter at baseband, the receiver can be AC-coupled in the baseband. This AC coupling significantly reduces cost and complexity by eliminating high-power reflected signals at and near DC. The high-pass corner frequency of the receive filter passes enough of the receive signal to still be measureable. The correlation is used to estimate the reflected carrier, which in turn enables cancellation of the carrier, improving RFID reader sensitivity.
摘要翻译： 公开了一种AC耦合RFID系统。 在信号通过基带接收滤波器之后，本发明的实施例将来自基带发射信号的发射数据和接收信号中的接收数据统一地相关。 通过在基带使用接收带通或高通滤波器，接收机可以在基带中交流耦合。 这种AC耦合通过消除DC附近和附近的大功率反射信号，显着降低了成本和复杂性。 接收滤波器的高通转角频率通过足够的接收信号仍然是可测量的。 相关性用于估计反射载波，从而使载波消除，从而提高RFID阅读器灵敏度。
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公开(公告)号：US20140130983A1
公开(公告)日：2014-05-15
申请号：US13858326
申请日：2013-04-08
申请人： Thomas Frederick
发明人： Thomas Frederick
IPC分类号： B65H35/00
CPC分类号： B65H35/004 , B65H2601/326 , Y10T156/12
摘要： The various embodiments disclosed here relate to tape dispensers with components that can apply tape, including applying tape over an object such as, for example, a cord, thereby securing it on a flat surface, while simultaneously centering the object underneath the tape.
摘要翻译： 这里公开的各种实施例涉及具有可以施加带子的部件的带式分配器，包括将带施加在诸如线缆的物体上，从而将其固定在平坦表面上，同时使物体在带的下方对中。
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