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    • 3. 发明申请
    • RFID TRANSCEIVER UNIT
    • RFID收发器单元
    • WO2006111528A1
    • 2006-10-26
    • PCT/EP2006/061641
    • 2006-04-18
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.VIRNICH, MichaelLAMESCH, Laurent
    • VIRNICH, MichaelLAMESCH, Laurent
    • G06K7/08B60R21/00
    • B60R21/01556B60R2021/01088G06K7/10336
    • An RFID transceiver unit (10) for detecting an RFID transponder said transceiver unit comprises a transmitter associated with a loop-shaped transmitting antenna (12) for transmitting an electromagnetic excitation field and a receiver associated with a loop-shaped receiving antenna (14). When the RFID transponder (18) is excited by the excitation field (24), the RFID transponder emits an electromagnetic response field, which induces a transponder signal in the receiving antenna. The received signal generated by the receiving antenna in response to an electromagnetic field thus contains the transponder signal. The received signal of the receiving antenna generally contains an interfering signal directly induced by the excitation field in the receiving antenna. The transceiver unit comprises means for attenuating the interfering signal in the received signal.
    • 一种用于检测RFID应答器的RFID收发器单元(10),所述收发器单元包括与用于传输电磁激励场的环形发射天线(12)相关联的发射机和与环形接收天线(14)相关联的接收机。 当RFID应答器(18)被激励场(24)激发时,RFID应答器发射电磁响应场,其在接收天线中引起应答器信号。 由接收天线响应于电磁场产生的接收信号因此包含应答器信号。 接收天线的接收信号通常包含由接收天线中的激励场直接感应的干扰信号。 收发器单元包括用于衰减接收信号中的干扰信号的装置。
    • 4. 发明申请
    • SEAT HEATER AND CAPACITIVE OCCUPANCY SENSOR COMBINATION
    • 座椅加热器和电容式传感器组合
    • WO2011117238A1
    • 2011-09-29
    • PCT/EP2011/054346
    • 2011-03-22
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.LAMESCH, LaurentVIRNICH, MichaelSCHOOS, Aloyse
    • LAMESCH, LaurentVIRNICH, MichaelSCHOOS, Aloyse
    • B60R21/015B60N2/00B60N2/56
    • B60N2/002B60N2/5685B60R21/01532
    • A combined seat heater and capacitive occupancy sensor comprises a heater network and a capacitive sensing network. The heater network includes a heating element (10) connected between a first node (21) and a second node (22) to dissipate heat. The capacitive sensing network is connected to the heating element to apply an oscillating current thereto and to derive a capacitive load of the heating element from the voltage resulting on the heating element. The heater network comprises a common mode choke (16) connecting the first and the second node to a third (23) and a fourth (24) node, respectively. The capacitive sensing network further comprises means to sustain the oscillating current in or to drive the oscillating current into the heating element as well as a high - impedance amplifier (32) having an input node operatively connected to the heating element to probe the resulting voltage, and an output node (44) to provide an output signal indicative of the voltage.
    • 组合座椅加热器和电容占用传感器包括加热器网络和电容感测网络。 加热器网络包括连接在第一节点(21)和第二节点(22)之间以散热的加热元件(10)。 电容感测网络连接到加热元件以向其施加振荡电流并且从产生加热元件的电压导出加热元件的电容性负载。 加热器网络包括分别将第一和第二节点连接到第三(23)和第四(24)节点的共模扼流圈(16)。 电容感测网络还包括在振荡电流中保持振荡电流或驱动振荡电流进入加热元件的装置以及具有可操作地连接到加热元件的输入节点以探测所得到的电压的高阻抗放大器(32) 以及输出节点(44),用于提供指示电压的输出信号。
    • 5. 发明申请
    • ROBUST CAPACITIVE MEASUREMENT SYSTEM
    • 可靠的电容式测量系统
    • WO2011154468A1
    • 2011-12-15
    • PCT/EP2011/059540
    • 2011-06-08
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.LAMESCH, Laurent
    • LAMESCH, Laurent
    • H03K17/955
    • G01R27/2605H03K17/955H03K2217/960705H03K2217/960775
    • A capacitive sensing circuit is disclosed, wherein the transimpedance amplifier in front of the mixer in prior art is removed respectively replaced by an amplifier with low gain and consequently high dynamic range. The mixer DC offset voltage or current together with the large amplification factor required after the mixer now would result in an inacceptable DC offset at the output of the signal chain. In order to eliminate the effect of the mixer offset, the amplifying stages after the mixer are AC coupled to the mixer output and one of the signals entering the mixer is phase modulated or amplitude modulated with a known low frequency signal. An additional mixer after the AC coupled amplifying stages is driven with the same low frequency modulating signal, resulting in the wanted DC output signal responsive to the capacitance to be measured.
    • 公开了一种电容式感测电路,其中现有技术中混频器前面的跨阻抗放大器分别由具有低增益和因此高动态范围的放大器取代。 混频器直流偏移电压或电流以及混频器之后所需的大放大因子将导致信号链输出端的不可接受的直流偏移。 为了消除混频器偏移的影响,混频器之后的放大级AC耦合到混频器输出,并且进入混频器的信号之一用已知的低频信号进行相位调制或幅度调制。 在AC耦合放大级之后的附加混频器用相同的低频调制信号驱动,导致有用的DC输出信号响应于要测量的电容。
    • 6. 发明申请
    • METHOD AND SYSTEM FOR DETECTING AN OCCUPANT IN A VEHICLE SEAT
    • 用于检测车辆座椅的方法和系统
    • WO2009034070A1
    • 2009-03-19
    • PCT/EP2008/061908
    • 2008-09-09
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.BIECK, WernerBOUR, ChristianDECOSTER, YvesGOEDERT, GuenterLAMESCH, LaurentORLEWSKI, Pierre
    • BIECK, WernerBOUR, ChristianDECOSTER, YvesGOEDERT, GuenterLAMESCH, LaurentORLEWSKI, Pierre
    • B60R21/015B60N2/00
    • B60R21/01532B60N2/002B60R21/0152
    • An occupant detection system comprises an electrode arrangement for placement into a seat of an automotive vehicle and an evaluation circuit operatively connected to the electrode arrangement. The latter includes a first electrode for emitting an electric field into a detection region above the vehicle seat, a second electrode and an electric insulator layer sandwiched between the first and second electrodes. When the electrode arrangement is in place in the seat, the first electrode forms with vehicle ground a first capacitor having a first capacitance, which is influenceable by an occupying item in the detection region through interaction of the occupying item with the electric field, the first electrode forms with the second electrode a second capacitor having a second capacitance and the second electrode forms with at least one of vehicle ground and a third electrode a third capacitor having a third capacitance. As a first indicator of the seat occupancy state, a measure of the first capacitance is determined while the first electrode is caused to emit an electric field into said detection region and the second electrode is operated as a driven shield for the first electrode. The fluctuations of at least one of the first, second and third capacitances are measured and the frequency spectrum of the measured fluctuations is analysed, which yields a second indicator of the occupancy state. The derivation of the occupancy state of the seat is then based on both the first indicator and the second indicator.
    • 乘员检测系统包括用于放置在机动车辆的座椅中的电极装置和可操作地连接到电极装置的评估电路。 后者包括用于将电场发射到车辆座椅上方的检测区域中的第一电极,夹在第一和第二电极之间的第二电极和电绝缘体层。 当电极布置在座位中时,第一电极形成具有第一电容的第一电容器,该第一电容器通过占用物体与电场的相互作用而被检测区域中的占用物品影响,第一电容器 电极与第二电极形成具有第二电容的第二电容器,并且第二电极与车辆接地和第三电极中的至少一个形成具有第三电容的第三电容器。 作为座椅占有状态的第一指标,在使第一电极向所述检测区域发射电场并且第二电极作为第一电极的驱动屏蔽来确定第一电容的测量。 测量第一,第二和第三电容中的至少一个的波动,并且分析所测量的波动的频谱,其产生占用状态的第二指示符。 然后,基于第一指示符和第二指示符,导出座位的占用状态。
    • 8. 发明申请
    • HEATING ELEMENT OPERATED AS CAPACITIVE SENSING ELECTRODE
    • 加热元件作为电容式感应电极操作
    • WO2012113795A1
    • 2012-08-30
    • PCT/EP2012/052940
    • 2012-02-21
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.LAMESCH, LaurentMEYERS, Thomas
    • LAMESCH, LaurentMEYERS, Thomas
    • B60R21/015
    • B60N2/002B60N2/5685B60R21/01532
    • A combined seat heater and capacitive occupancy sensor comprises a heater network including a heating element (11) and a capacitive sensing circuit connected to the heating element to sense a capacitive load. A first and a second interface are provided for connecting the heating element to a first and a second terminal of a power source, respectively. Each interface comprises electronically controlled switches (3, 5; 4, 6) arranged in series and defining an intermediate node (20; 21). An oscillator (8) is AC-coupled to the intermediate nodes to apply an oscillating voltage thereto. A current measuring means (9), AC-coupled between the oscillator and the heating element, keeps the AC-potential of the heating element at least substantially equal, in amplitude and phase, to the oscillating voltage on the intermediate nodes and to derive the capacitive load from a thus resulting current flowing into the heating element.
    • 组合座椅加热器和电容占用传感器包括加热器网络,其包括加热元件(11)和连接到加热元件以感测电容性负载的电容感测电路。 提供了第一和第二接口,用于将加热元件分别连接到电源的第一和第二端子。 每个接口包括串联布置并限定中间节点(20; 21)的电子控制开关(3,5; 4,6)。 振荡器(8)与中间节点交流耦合以向其施加振荡电压。 交流耦合在振荡器和加热元件之间的电流测量装置(9)使加热元件的交流电势在振幅和相位上至少基本上等于中间节点上的振荡电压,并导出 由此产生的电流流入加热元件的电容性负载。
    • 9. 发明申请
    • COMBINED SEAT HEATER AND CAPACITIVE OCCUPANCY SENSOR
    • 组合式座椅加热器和电容式传感器
    • WO2011117237A1
    • 2011-09-29
    • PCT/EP2011/054343
    • 2011-03-22
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.LAMESCH, LaurentSCHOOS, Aloyse
    • LAMESCH, LaurentSCHOOS, Aloyse
    • B60R21/015B60N2/00B60N2/56
    • B60N2/002B60N2/5685B60R21/01532
    • A combined seat heater and capacitive occupancy sensor comprises a heating element (10) connected between a first (21) and a second (22) node, and a capacitive sensing network connected to the heating element to apply an oscillating voltage thereto and to derive the capacitive load of the heating element. A common mode choke (16) connects the first and second node to a third (23) and fourth (24) node, respectively. The capacitive sensing network comprises an oscillator (28), AC-coupled to the third and/or the fourth node to drive oscillating voltage into that node, and a transimpedance amplifier (32), which has a first input to receive the oscillating voltage as reference voltage and a second input operatively connected to the heating element. The transimpedance amplifier maintains a voltage on its second input equal to the reference voltage by driving a current into the second input. An output signal (44) indicates the AC component of the current driven into the second input.
    • 组合座椅加热器和电容占用传感器包括连接在第一(21)和第二(22)节点之间的加热元件(10)和连接到加热元件的电容感测网络,以向其施加振荡电压并导出 加热元件的容性负载。 共模扼流圈(16)分别将第一和第二节点连接到第三(23)和第四(24)节点。 电容感测网络包括一个与第三和/或第四节点交流耦合的振荡器(28),以驱动振荡电压进入该节点;以及跨阻抗放大器(32),其具有接收振荡电压的第一输入 参考电压和可操作地连接到加热元件的第二输入。 跨阻放大器通过将电流驱动到第二输入端来保持其第二输入端的电压等于参考电压。 输出信号(44)表示驱动到第二输入端的电流的交流分量。