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118 条记录 (耗时 0.044 秒)

    Time-domain estimator for image reconstruction
    3.
    发明授权
    Time-domain estimator for image reconstruction 有权
    图像重构的时域估计器

    公开(公告)号：US08818064B2

    公开(公告)日：2014-08-26

    申请号：US13380224

    申请日：2010-06-25

    申请人： William F. Walker ,  Michael Ellis

    发明人： William F. Walker ,  Michael Ellis

    IPC分类号： G06K9/00 ,  A61B8/00

    CPC分类号： A61B8/00 ,  G01S7/52077 ,  G01S15/8977

    摘要： One or more systems, methods, or computer program products can include receiving an echo data set including information representative of an echo sensed by a transducer, provided at least in part by one or more actual targets included in a region of interest. The region of interest can be modeled, including selecting or generating an array manifold matrix including information corresponding to any one or more candidate targets. The weights of the candidate targets can be determined using the array manifold matrix and the echo data set, including minimizing an argument of a function modeling the weights of the candidate targets. In an example, the echo data set can be dithered, such as by adding a specified dithering signal.

    摘要翻译： 一个或多个系统，方法或计算机程序产品可以包括接收包括表示由换能器感测的回波的信息的回波数据集，所述回波至少部分地由包括在感兴趣区域中的一个或多个实际目标提供。 可以对兴趣区域进行建模，包括选择或生成包括对应于任何一个或多个候选目标的信息的阵列歧管矩阵。 可以使用阵列歧管矩阵和回波数据集来确定候选目标的权重，包括最小化建模候选目标的权重的函数的参数。 在一个示例中，回波数据集可以被抖动，例如通过添加指定的抖动信号。

    Communicating with an implanted wireless sensor
    6.
    发明授权
    Communicating with an implanted wireless sensor 有权
    与植入式无线传感器进行通信

    公开(公告)号：US08237451B2

    公开(公告)日：2012-08-07

    申请号：US13078091

    申请日：2011-04-01

    申请人： James Joy ,  Jason Kroh ,  Michael Ellis ,  Mark Allen ,  Wilton Pyle

    发明人： James Joy ,  Jason Kroh ,  Michael Ellis ,  Mark Allen ,  Wilton Pyle

    IPC分类号： G01R27/32 ,  G01R35/00 ,  G01R23/12

    CPC分类号： G01R23/12 ,  A61B5/0002 ,  A61B5/0031 ,  A61B5/05 ,  A61B5/076 ,  A61B2560/0219 ,  A61B2560/0223 ,  G01D21/00 ,  G01F15/066 ,  G01R23/145

    摘要： The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.

    摘要翻译： 本发明通过调节激励信号的相位和频率直到激励信号的频率与传感器的谐振频率相匹配来确定传感器的谐振频率。 该系统以低占空比激励传感器，具有预定频率或一组频率和预定幅度的RF能量门控突发。 激励信号通过磁耦合耦合到传感器，并且感应传感器中的电流，其以传感器的谐振频率振荡。 系统通过磁耦合接收传感器的响铃响应，并确定传感器的谐振频率，用于计算测量的物理参数。 该系统使用一对锁相环来调节激励信号的相位和频率。