公开(公告)号：US10155154B2

公开(公告)日：2018-12-18

申请号：US15402539

申请日：2017-01-10

Applicant: Sony Interactive Entertainment Inc.

Inventor： Sergey Bashkirov ,  Takeo Matsukawa ,  Jeffrey R. Stafford

IPC: A63F13/211 ,  A63F13/21 ,  A63F13/428

Abstract: To derive three dimensional (3D) position and orientation of a 3-axis (or more) magnetometer/accelerometer device (such as may be implemented in VR or AR headset or computer game controller) without line of sight constraints, a spinning magnetic field is used to discriminate and remove the external (Earth's) magnetic field from the spinning magnetic field. This reduces the problem to finding the distance to the source of the magnetic field using a calibration table (or formula), finding two angles describing the deviation of the magnetic sensor from the axis of rotation of the spinning magnetic field and the phase around this axis, and from these values deriving the orientation of the sensor.