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    Methods, Devices and Systems for Determining the Zero Rate Output of a Sensor
    4.
    发明申请
    Methods, Devices and Systems for Determining the Zero Rate Output of a Sensor 审中-公开
    用于确定传感器零速率输出的方法，装置和系统

    公开(公告)号：US20140222361A1

    公开(公告)日：2014-08-07

    申请号：US14176464

    申请日：2014-02-10

    Applicant: Hillcrest Laboratories, Inc.

    Inventor： Hua SHENG ,  Bryan C. COOK ,  Matthew G. LIBERTY

    IPC: G01P21/00 ,  G01P21/02

    CPC classification number: G01P21/00 ,  G01P21/02 ,  G06F3/0346 ,  G06F3/038 ,  H04N21/42222

    Abstract: A bias value associated with a sensor, e.g., a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using a ZRO-tracking filter which is a combination of a moving-average filter and a Kalman filter having at least one constraint enforced against at least one operating parameter of the Kalman filter. It achieves faster convergence on an estimated bias value and produces less estimate error after convergence. A resultant bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.

    Abstract translation: 与传感器相关联的偏置值，例如，当传感器静止时从传感器输出的时变非零值使用ZRO跟踪滤波器来估计，该ZRO跟踪滤波器是移动平均滤波器和 具有对卡尔曼滤波器的至少一个操作参数强制执行的至少一个约束的卡尔曼滤波器。 它在估计的偏差值上实现更快的收敛，并且在收敛后产生较少的估计误差。 然后可以使用合成的偏差估计来补偿例如3D定位装置中的传感器的偏置输出。

    GYROSCOPE STABILIZER FILTER
    6.
    发明申请
    GYROSCOPE STABILIZER FILTER 有权
    GYROSCOPE稳定器过滤器

    公开(公告)号：US20150226578A1

    公开(公告)日：2015-08-13

    申请号：US14266134

    申请日：2014-04-30

    Applicant: HILLCREST LABORATORIES, INC.

    Inventor： Bryan A. COOK ,  Yun LI ,  Matthew G. LIBERTY

    IPC: G01C25/00

    CPC classification number: G01C25/005 ,  A63F13/25 ,  G01C19/5776

    Abstract: A method, a filtering module, and a computer-readable medium are configured to filter measurements acquired in a sensor reference system. Filtered measurements of motion sensors and a magnetometer attached to the device may then be used to determine orientation of a device in a non-inertial reference system. The measurements are filtered in a reference system, whose position relative to the sensor system can be calculated, and in which gravity and Earth's magnetic field have substantially constant direction and magnitude during the filtering window.

    Abstract translation: 配置方法，过滤模块和计算机可读介质来过滤在传感器参考系统中获取的测量结果。 可以使用运动传感器和连接到设备的磁力计的滤波测量来确定非惯性参考系统中的设备的方位。 在参考系统中过滤测量值，该参考系统可以计算其相对于传感器系统的位置，并且其中重力和地球的磁场在滤波窗口中具有基本恒定的方向和幅度。

    GYROSCOPE STABILIZER FILTER
    9.
    发明申请
    GYROSCOPE STABILIZER FILTER 审中-公开

    公开(公告)号：US20160349078A1

    公开(公告)日：2016-12-01

    申请号：US15185461

    申请日：2016-06-17

    Applicant: HILLCREST LABORATORIES, INC.

    Inventor： Bryan A. COOK ,  Yun LI ,  Matthew G. LIBERTY

    IPC: G01C25/00 ,  A63F13/25 ,  G01C19/5776

    CPC classification number: G01C25/005 ,  A63F13/25 ,  G01C19/5776

    Abstract: A method, a filtering module, and a computer-readable medium are configured to filter measurements acquired in a sensor reference system. Filtered measurements of motion sensors and a magnetometer attached to the device may then be used to determine orientation of a device in a non-inertial reference system. The measurements are filtered in a reference system, whose position relative to the sensor system can be calculated, and in which gravity and Earth's magnetic field have substantially constant direction and magnitude during the filtering window.

    3D POINTING DEVICES WITH ORIENTATION COMPENSATION AND IMPROVED USABILITY
    10.
    发明申请
    3D POINTING DEVICES WITH ORIENTATION COMPENSATION AND IMPROVED USABILITY 有权
    具有方位补偿和改进的可用性的3D点对点设备

    公开(公告)号：US20150091800A1

    公开(公告)日：2015-04-02

    申请号：US14563314

    申请日：2014-12-08

    Applicant: Hillcrest Laboratories, Inc.

    Inventor： Matthew G. LIBERTY

    IPC: G06F3/0346

    CPC classification number: G06F3/017 ,  G06F3/033 ,  G06F3/0346 ,  G06F3/0383 ,  H04N5/4403 ,  H04N21/42222 ,  H04N2005/4432

    Abstract: Systems and methods according to the present invention describe 3D pointing devices which enhance usability by transforming sensed motion data from a first frame of reference (e.g., the body of the 3D pointing device) into a second frame of reference (e.g., a user's frame of reference). One exemplary embodiment of the present invention removes effects associated with a tilt orientation in which the 3D pointing device is held by a user.

    Abstract translation: 根据本发明的系统和方法描述了通过将来自第一参考系（例如，3D定位设备的主体）的感测的运动数据变换为第二参考帧（例如，用户的帧的用户的帧 参考）。 本发明的一个示例性实施例除去与用户保持3D定位设备的倾斜取向相关联的效果。

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