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    • 3. 发明授权
    • Oscillation maintenance circuit for half duplex transponder
    • 半双工应答器的振荡维护电路
    • US07667548B2
    • 2010-02-23
    • US11831213
    • 2007-07-31
    • Herbert Meier
    • Herbert Meier
    • H03B11/10H03B5/08G01S13/74
    • G06K19/0723
    • An oscillation maintenance circuit for a half-duplex transponder that has an LC resonant circuit, a storage capacitor and a rectifier connected to charge the storage capacitor with a rectified oscillation signal, having an end-of-burst detector providing an end-of-burst signal when the amplitude of the oscillation signal has dropped below a predetermined threshold. A clock regenerator provides a clock signal derived from the oscillation signal. Switching means controlled by the clock signal in the presence of the end-of-burst signal connect the storage capacitor with LC resonant circuit through at least one current limiting resistor during part of the period of the clock signal, in such a manner that energy is fed into the LC resonant circuit.
    • 一种具有LC谐振电路,存储电容器和整流器的半双工转发器的振荡维持电路,其连接到用整流的振荡信号对存储电容器充电,具有提供爆发结束的突发结束检测器 当振荡信号的幅度下降到预定阈值以下时发出信号。 时钟再生器提供从振荡信号导出的时钟信号。 在存在突发信号的情况下由时钟信号控制的开关装置在时钟信号的一部分期间通过至少一个限流电阻器将存储电容器与LC谐振电路连接,使得能量为 馈入LC谐振电路。
    • 6. 发明授权
    • Transponders, Interrogators, systems and methods for elimination of
interrogator synchronization requirement
    • 转发器,询问器,消除询问器同步要求的系统和方法
    • US5541604A
    • 1996-07-30
    • US117258
    • 1993-09-03
    • Herbert Meier
    • Herbert Meier
    • G01S13/75G06K19/07H04L25/49G01S13/74
    • G01S13/758G06K19/0723H04L25/4902
    • A Radio Frequency Identification (RFID) system having an interrogator (12) and a transponder (14). The interrogator has a first tuned circuit (28) of a powering frequency for sending a powering burst to a transponder (14), a filter/demodulator (64) for receiving an wireless, modulated RF response from a transponder (14). The interrogator (12) further has a second tuned circuit (29) in electrical communication with a modulator (48), the second tuned circuit (29) having a selected bandwidth about a communication frequency, the selected bandwidth not substantially overlapping the powering frequency and encompassing the bandwidth of the modulated carrier of the RF response. The interrogator also has a controller (16) in electrical communication with the filter/demodulator (64) and the tuned circuits (28,29) and capable of enabling the first tuned circuit (28) to send the powering burst during a first time period and of enabling the modulator (48) in electrical communication with the second tuned circuit (29) to receive the RF response during a second time period. The transponder has a tuned circuit (34), a tuning circuit (54,56) in electrical communication with the tuned circuit (34) for modifying the frequency characteristics of the tuned circuit (34) such that it is can be tuned during the powering burst to the powering frequency and to be tuned during the RF response to the communication frequency. The transponder (14) also includes a demodulator (66) in electrical communication with the tuned circuit (34) for receiving the RF interrogation therefrom and for demodulating data from the RF interrogation.
    • 一种具有询问器(12)和应答器(14)的射频识别(RFID)系统。 询问器具有用于向应答器(14)发送供电突发的供电频率的第一调谐电路(28),用于从应答器(14)接收无线调制RF响应的滤波器/解调器(64)。 询问器(12)还具有与调制器(48)电连通的第二调谐电路(29),第二调谐电路(29)具有关于通信频率的选定带宽,所选择的带宽基本上不与供电频率重叠, 包括RF响应的调制载波的带宽。 询问器还具有与滤波器/解调器(64)和调谐电路(28,29)电连通并且能够使第一调谐电路(28)在第一时间段期间发送供电脉冲串的控制器(16) 以及使得与第二调谐电路(29)电通信的调制器(48)在第二时间段期间接收RF响应。 转发器具有调谐电路(34),与调谐电路(34)电连通的调谐电路(54,56),用于修改调谐电路(34)的频率特性,从而可以在供电期间进行调谐 突发到供电频率并且在对通信频率的RF响应期间被调谐。 应答器(14)还包括与调谐电路(34)电通信的解调器(66),用于从其接收RF询问,并用于解调来自RF询问的数据。
    • 7. 发明授权
    • Transponder systems for automatic identification purposes
    • 用于自动识别目的的应答器系统
    • US5351052A
    • 1994-09-27
    • US083808
    • 1993-06-28
    • Loek D'HontAnne TipHerbert Meier
    • Loek D'HontAnne TipHerbert Meier
    • H04B1/04G01S13/78G06K7/00G07B15/06G08G1/017H04B1/18H04B1/59H04B7/26G01S13/74
    • G07B15/063G06K7/0008G08G1/017G01S13/78
    • A method of communicating between an interrogator (10) and at least a first and second transponder (12). The transponders (12) are separately located within a first and a second vehicle (20) travelling within a first and a second traffic lane, respectively. The method has the steps of providing a first and a second LF antenna (16) associated with and proximity to a first and a second traffic lane, respectively. From each of the first and second LF antennas (16) a continuous LF subcarrier is transmitted to serve as a clock signal for each antenna's associated transponder (12). Initially, a wake-up signal is sent by each of the LF antennas (16) to its associated transponder (12). Following the wake-up signal, a unique lane code is sent by each of the LF antennas (16) to its associated transponder (12). The transponder (12) stores its unique lane code in its memory (70). The transponder then sends a UHF response in a pre-determined time period depending on the unique lane code stored in each of the transponders (12). The time period in which the transponder (12) sends its UHF response is unique to that transponder (12) so that interference between responding transponders (12)is avoided. Other devices, systems and methods are also disclosed.
    • 一种在询问器(10)和至少第一和第二应答器(12)之间通信的方法。 应答器(12)分别位于在第一和第二行车道内行进的第一和第二车辆(20)内。 该方法具有分别提供与第一和第二行车道相关联并且接近第一和第二行车道的第一和第二LF天线(16)的步骤。 从第一和第二LF天线(16)中的每一个发射连续的LF子载波以用作每个天线相关联的应答器(12)的时钟信号。 最初,每个LF天线(16)向其相关联的转发器(12)发送唤醒信号。 在唤醒信号之后,每个LF天线(16)将其唯一的通道码发送到其相关联的应答器(12)。 应答器(12)将其唯一的车道码存储在其存储器(70)中。 然后,应答器根据存储在每个应答器(12)中的唯一车道码,在预定时间段内发送UHF响应。 应答器(12)发送其UHF响应的时间段对于该应答器(12)是唯一的,从而避免响应应答器(12)之间的干扰。 还公开了其他装置,系统和方法。
    • 9. 发明授权
    • Oscillation maintenance circuit
    • 振荡维护电路
    • US5283529A
    • 1994-02-01
    • US491009
    • 1990-03-09
    • Herbert Meier
    • Herbert Meier
    • G01S13/75G06K7/00H03B11/00H04B1/59H03K3/33H03K3/353
    • G06K7/0008G01S13/758
    • A circuit arrangement is described for generating pulses for maintaining the oscillations of a resonance circuit after termination of an outside stimulation of the oscillations by means of an HF carrier oscillation. The circuit arrangement comprises an energy storage element (28) chargeable by the HF carrier oscillation to a supply voltage value. An amplitude detector circuit (44) serves to generate a trigger circuit when the oscillation amplitude of the resonance circuit (12) drops beneath the supply voltage value. A first switching element (T2) supplies the oscillations of the resonance circuit (12) under the control of the trigger signal to a delay circuit (34, 53, 58, 54, 62, 68) which at its output furnishes switching pulses with a predetermined phase position with respect to the oscillations of the resonance circuit (12). A second switching element (T1), for the duration of each switching pulse, enables the supply of energy from the energy storage element (28) to the resonance circuit (12).
    • 描述了一种电路装置,用于在通过HF载波振荡的振荡的外部刺激终止之后产生用于维持谐振电路的振荡的脉冲。 电路装置包括能够由HF载波振荡充电至电源电压值的能量存储元件(28)。 当谐振电路(12)的振荡幅度下降到电源电压值以下时,振幅检测器电路(44)用于产生触发电路。 第一开关元件(T2)在触发信号的控制下将谐振电路(12)的振荡提供给延迟电路(34,53,58,54,62,68),延迟电路在其输出端提供开关脉冲 相对于谐振电路(12)的振荡的预定相位位置。 在每个开关脉冲期间,第二开关元件(T1)能够从能量存储元件(28)到谐振电路(12)的能量供应。