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    • 2. 发明授权
    • Electronic identification system with improved sensitivity
    • 灵敏度提高的电子识别系统
    • US06472975B1
    • 2002-10-29
    • US08262157
    • 1994-06-20
    • Michael L. BeigelNathaniel PolishSteven R. FrankRobert E. Malm
    • Michael L. BeigelNathaniel PolishSteven R. FrankRobert E. Malm
    • H04Q100
    • G06K19/0726G06K7/0008G06K19/0723
    • The coil in the reader that is used to establish an alternating magnetic field is transformer-coupled through capacitors to a push-pull driving circuit consisting of four field-effect transistors connected in a bridge arrangement. The coil, capacitors, and coupling circuitry are maintained in a tuned condition by continually adjusting either the driving frequency, the coil inductance, or the capacitor capacitance during communications. A tag utilizes a coil to couple with the reader's alternating magnetic field and a capacitor to resonate the coil, thereby extracting power from the field more efficiently. Transformer coupling of the coil and capacitor is utilized for improved impedance matching. The coil, capacitor, and coupling circuitry can be maintained in a tuned condition by continually adjusting either the coil inductance, or the capacitor capacitance during communications. Certain configurations of the system may require that tuning maintenance be discontinued during the transmission of data.
    • 用于建立交变磁场的读取器中的线圈通过电容器被变压耦合到由以桥式布置连接的四个场效应晶体管组成的推挽驱动电路。 通过在通信期间连续调节驱动频率,线圈电感或电容器电容,将线圈,电容器和耦合电路保持在调谐状态。 标签利用线圈与读取器的交变磁场耦合,并且电容器使线圈谐振,从而更有效地从场提取功率。 线圈和电容器的变压器耦合用于改进阻抗匹配。 线圈,电容器和耦合电路可以通过连续调节线圈电感或通信期间的电容器电容来保持调谐状态。 系统的某些配置可能需要在传输数据期间停止调谐维护。
    • 3. 发明申请
    • ELECTRONIC IDENTIFICATION SYSTEM WITH IMPROVED SENSITIVITY
    • 具有提高灵敏度的电子识别系统
    • US20100182127A1
    • 2010-07-22
    • US12748428
    • 2010-03-28
    • MICHAEL L. BEIGELNathaniel PolishSteven R. FrankRobert E. Malm
    • MICHAEL L. BEIGELNathaniel PolishSteven R. FrankRobert E. Malm
    • H04Q5/22
    • G06K19/0726G06K7/0008G06K19/0723
    • The electronic identification system provides two-way communications between reader and tags using alternating magnetic fields established by the reader and tag. Communication is accomplished by utilizing either a one-step or a two-step modulation process in which the information to be communicated either modulates an alternating magnetic field directly or modulates a periodic signal which modulates an alternating magnetic field. The coil in the reader that is used to establish an alternating magnetic field is transformer-coupled through capacitors to a push-pull driving circuit consisting of four field-effect transistors connected in a bridge arrangement. The coil, capacitors, and coupling circuitry are maintained in a tuned condition by continually adjusting either the driving frequency, the coil inductance, or the capacitor capacitance during communications. A tag utilizes a coil to couple with the reader's alternating magnetic field and a capacitor to resonate the coil, thereby extracting power from the field more efficiently. Transformer coupling of the coil and capacitor is utilized for improved impedance matching. The coil, capacitor, and coupling circuitry can be maintained in a tuned condition by continually adjusting either the coil inductance, or the capacitor capacitance during communications. Certain configurations of the system may require that tuning maintenance be discontinued during the transmission of data.
    • 电子识别系统使用读取器和标签建立的交变磁场,提供阅读器和标签之间的双向通信。 通过利用一步或两步调制过程来完成通信,其中要传送的信息直接调制交变磁场或调制调制交变磁场的周期信号。 用于建立交变磁场的读取器中的线圈通过电容器被变压耦合到由以桥式布置连接的四个场效应晶体管组成的推挽驱动电路。 通过在通信期间连续调节驱动频率,线圈电感或电容器电容,将线圈,电容器和耦合电路保持在调谐状态。 标签利用线圈与读取器的交变磁场耦合,并且电容器使线圈谐振,从而更有效地从场提取功率。 线圈和电容器的变压器耦合用于改进阻抗匹配。 线圈,电容器和耦合电路可以通过连续调节线圈电感或通信期间的电容器电容来保持调谐状态。 系统的某些配置可能需要在传输数据期间停止调谐维护。
    • 5. 发明授权
    • Automatic force generating and control system
    • 自动生成和控制系统
    • US5058888A
    • 1991-10-22
    • US436191
    • 1989-11-13
    • Christopher W. WalkerMichael M. SzafranskiSung H. KimHowell F. HsiaoSteven R. Frank
    • Christopher W. WalkerMichael M. SzafranskiSung H. KimHowell F. HsiaoSteven R. Frank
    • A63B21/008A63B23/00
    • A63B23/00A63B21/4031A63B21/4047A63B23/03525A63B21/0083A63B2208/12
    • An automatic force generating and control system including a lever pivotally attached to a monolith and a lower body exerciser pivotally attached to a bench, with both the bench and monolith attached to a platform. The rotation of the lower body exerciser is translated into linear movement by a series of sprockets and timing belts. The electrical output from load cells and potentiometers are processed by the electronic controls to determine the speed, direction and position and the amount and direction of force being exerted on the lever and lower body exerciser. Resistance to movement is provided by a lever hydraulics assembly and a lower body hydraulics assembly. The lever has arms and handles which articulate to the physique of the user and the exercise to be performed. The arms pivot in mirror relationship and the lower body exerciser may be lengthened or shortened. Electric solenoid clutches or hydraulics may engage the handles to the arms and the arms to the head of the lever. In an alternate embodiment, a mechanical linkage may transmit rotation between the arm and the lower body exerciser negating the need for one of the hydraulics assemblies.
    • 一种自动力产生和控制系统,包括可枢转地连接到整料的杠杆和可枢转地附接到工作台的下身练习器,台架和整体件连接到平台。 下身锻炼者的旋转通过一系列链轮和同步皮带转换为直线运动。 称重传感器和电位器的电气输出由电子控制器进行处理,以确定速度,方向和位置以及施加在杠杆和下身锻炼者上的力的量和方向。 杠杆液压组件和下体液压组件提供抵抗运动的能力。 杠杆具有与使用者的身体相关的手臂和手柄以及要执行的运动。 镜子关系的手臂枢轴和下身锻炼者可以延长或缩短。 电动螺线管离合器或液压装置可以将手柄和手臂接合到杆的头部。 在替代实施例中,机械联动装置可以在臂和下体锻炼者之间传递旋转,从而不需要一个液压组件。