公开(公告)号：US20130169539A1

公开(公告)日：2013-07-04

申请号：US13780600

申请日：2013-02-28

Applicant: Hillcrest Laboratories, Inc.

Inventor： Hua SHENG ,  Matthew G. LIBERTY ,  Christopher D. ROLLER ,  Charles W.K. GRITTON

IPC: G06F3/033

CPC classification number: G06F3/0346 ,  G01D3/028 ,  G01R29/00 ,  G06F3/033 ,  G06F19/00 ,  H04N5/4403 ,  H04N21/42222 ,  H04N2005/4428

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 at least two, different bias estimating techniques. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.

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。

公开(公告)号：US20140267036A1

公开(公告)日：2014-09-18

申请号：US14218009

申请日：2014-03-18

Applicant: Hillcrest Laboratories, Inc.

Inventor： Hua SHENG ,  Matthew G. LIBERTY ,  Christopher D. ROLLER ,  Charles W.K. GRITTON

IPC: G06F3/0346

CPC classification number: G06F3/0346 ,  G01D3/028 ,  G01R29/00 ,  G06F3/033 ,  G06F19/00 ,  H04N5/4403 ,  H04N21/42222 ,  H04N2005/4428

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 at least two, different bias estimating techniques. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.

Abstract translation: 使用至少两种不同的偏差估计技术来估计与传感器相关联的偏置值，例如当传感器不动时从传感器输出的时变非零值。 然后可以使用所得到的组合或选择的偏差估计来补偿例如3D定位设备中的传感器的偏置输出。