-
公开(公告)号：US10274318B1
公开(公告)日：2019-04-30
申请号：US14502174
申请日：2014-09-30
Applicant: Amazon Technologies, Inc.
Inventor： Jung Bae Sohn
Abstract: A system for determining and correcting a calculated orientation of a computing device based on data from an accelerometer and a gyroscope. The system utilizes a modified Kalman filter that updates covariance to reduce decay over time based on a residual of the filter. Gyroscope bias is tracked and offset based on the updated covariance and the residual. The residual is based on an observational orientation determined from an angle between a measured acceleration vector and an expected acceleration vector, rotating a predicted frame based on the angle.
-
公开(公告)号：US09068843B1
公开(公告)日：2015-06-30
申请号：US14497512
申请日：2014-09-26
Applicant: Amazon Technologies, Inc.
Inventor： Jung Bae Sohn , David William Devries
IPC: A63F13/00 , G01C21/18 , H04W4/02 , G06F3/03 , G06F3/0346
CPC classification number: G01C21/18 , G06F1/1694 , G06F3/03 , G06F3/0346 , G06F3/038 , H04W4/027
Abstract: A system for determining and correcting a calculated orientation of a computing device based on data from an accelerometer and a gyroscope. The system compares a predicted direction of gravity in a predicted frame of the device with a measured direction of gravity in a sensor frame of the device, and determines an angle of the difference between the directions. A correction is calculated to rotate the predicted frame around an axis by the angle relative to a sensor frame, the axis being perpendicular to both the predicted and measured directions of gravity. A predicted orientation of a reference “Earth” frame relative to the predicted frame is calculated based on the gyroscope data. A corrected orientation is determined by applying the correction to the predicted orientation, providing an orientation of the Earth reference frame relative to the sensor frame.
Abstract translation: 一种用于基于来自加速度计和陀螺仪的数据来确定和校正计算装置的计算取向的系统。 该系统将装置的预测帧中的预测重力方向与装置的传感器框架中的测量重力方向进行比较，并且确定方向之间的差异的角度。 计算校正以使围绕轴的预测框架相对于传感器框架旋转角度，该轴线与预测和测量的重力方向垂直。 基于陀螺仪数据计算参考“地球”帧相对于预测帧的预测取向。 通过将校正应用于预测取向来确定校正的取向，提供地球参考系相对于传感器框架的取向。
-
公开(公告)号：US10009531B1
公开(公告)日：2018-06-26
申请号：US14855279
申请日：2015-09-15
Applicant: Amazon Technologies, Inc.
Inventor： Jung Bae Sohn , Leo Benedict Baldwin
CPC classification number: H04N5/2259 , G02B5/045 , H04N5/2254 , H04N5/23238
Abstract: A field of view (FOV) extender may include prisms that direct light from an angle outside of an angle of view associated with a lens of camera, onto the image sensor of the camera, thereby piecewise extending the field of view of the camera beyond the unaltered angle of view of the camera. The prisms may be oriented to direct light around an outer region of the image sensor, which may generate signals use for motion detection purposes. Each prism may be spaced apart from an adjacent prism by a gap, which may create an alternating sequence of prisms and gaps. An inner region of the image sensor may capture imagery that may be suitable for output to a user.
-
-
Search Results
3
records
(took 0.014 seconds)
