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    • 5. 发明授权
    • Micropower differential sensor measurement
    • 微功率差动传感器测量
    • US06714763B2
    • 2004-03-30
    • US10215752
    • 2002-08-09
    • Michael John HamelChristopher P. TownsendSteven W. Arms
    • Michael John HamelChristopher P. TownsendSteven W. Arms
    • H04B500
    • G06K19/0701G06K19/0723
    • A sensing device includes a Wheatstone bridge and a source of a stimulation configured to apply the stimulation across two electrodes of the Wheatstone bridge. The device also includes a timing sensitive circuit configured to detect timing of a signal appearing across one of the other electrodes of the bridge as a result of the stimulation being applied. The timing provides a way to read the sensor. The device can be powered remotely and data so read can be transmitted using the remote power. The timing sensitive circuit includes a comparator. The comparator provides a high logic signal for a time related to the reactance of one leg of the Wheatstone bridge, and that provides a reading of a differential sensor having elements in each leg of the bridge.
    • 感测装置包括惠斯通电桥和被配置为在惠斯通电桥的两个电极上施加刺激的刺激源。 该装置还包括定时敏感电路,其被配置为作为施加刺激的结果来检测出现在桥的另一个电极之间的信号的定时。 时序提供了读取传感器的方法。 该设备可以远程供电,并且可以使用远程电源传输所读取的数据。 时序敏感电路包括比较器。 该比较器提供了一个与逻辑信号相关的时间,与惠斯通电桥的一条电抗相关,并提供了一个差分传感器的读数,该差分传感器在桥的每条支路中都有元件。