公开(公告)号：US10704929B1

公开(公告)日：2020-07-07

申请号：US16202300

申请日：2018-11-28

申请人： OMMO Technologies, Inc.

发明人： Fathollah Memarzanjany ,  Minjie Zheng

IPC分类号： G01D5/12 ,  G01D5/14 ,  G01D5/20 ,  G01B7/14 ,  G01B7/30 ,  G01V3/08 ,  G01V3/10 ,  A61B34/20

摘要： In a general aspect, a position tracking system includes a sphere magnet that produces a magnetic field in a space. A magnetic field control system is configured to change the magnetic field by rotating the sphere magnet through a time-series of rotations over a time period. A position marker includes a magnetic field sensor that is configured to measure the magnetic field in the space during the time period. A data processing apparatus is configured to determine the position of the position marker based on magnetic field measurements obtained by the magnetic field sensor in the space during the time period.

公开(公告)号：US10276289B1

公开(公告)日：2019-04-30

申请号：US15996055

申请日：2018-06-01

申请人： OMMO Technologies, Inc.

发明人： Jonah William Kirby ,  Matthew Pickett ,  Minjie Zheng ,  Jonathan Feldkamp

IPC分类号： G01D5/16 ,  H01F7/02 ,  H01F13/00 ,  G01B7/00 ,  G01D5/14

摘要： In a general aspect, a position detection system includes a magnetic field generator configured to generate a time-varying magnetic field. The magnetic field generator includes a carrier assembly that defines a first axis of rotation and comprises a permanent magnet having a center of mass. The magnetic field generator also includes a drive assembly that is coupled to the carrier assembly and configured to act on the carrier assembly to rotate the permanent magnet simultaneously about the first axis of rotation and a second axis of rotation. The second axis of rotation intersects the first axis of rotation at an intersection that is offset from the center of mass of the permanent magnet. The position detection system additionally includes a computer device configured to determine a position of a sensor based on magnetic field measurements obtained by the sensor in the time-varying magnetic field.

公开(公告)号：US10151606B1

公开(公告)日：2018-12-11

申请号：US15436967

申请日：2017-02-20

申请人： Ommo Technologies, Inc.

发明人： Fathollah Memarzanjany ,  Minjie Zheng

IPC分类号： G01D5/12 ,  G01D5/14 ,  G01D5/20 ,  G01B7/14 ,  G01B7/30 ,  G01V3/08 ,  G01V3/10

摘要： In a general aspect, a position tracking system includes a sphere magnet that produces a magnetic field in a space. A magnetic field control system is configured to change the magnetic field by rotating the sphere magnet through a time-series of rotations over a time period. A position marker includes a magnetic field sensor that is configured to measure the magnetic field in the space during the time period. A data processing apparatus is configured to determine the position of the position marker based on magnetic field measurements obtained by the magnetic field sensor in the space during the time period.