Title:
【発明の名称】ひずみ補償を有する電磁式位置及び配向追跡方法及び装置
Document Type and Number:
Japanese Patent JP2003513284
Kind Code:
A
Abstract:
Methods and apparatus for position/orientation tracking within a bounded volume employ at least one stationary sensor, called a "witness sensor," having a fixed position and orientation near or within the volume to account for electromagnetic distortion. One or more probe sensors are placed on an object to be tracked within the volume, and the output of each witness sensor is used to compute the parameters of a non-real effective electromagnetic source. The parameters of the effective source are used as inputs to the computation of position and orientation as measured by each probe sensor, as if the object were in the non-distorted electromagnetic field produced by the effective source or sources. In addition to trackers for helmet-mounted displays in aircraft, tank, and armored-vehicle applications, the invention finds utility in any electromagnetic tracking system which might be subject to electromagnetic distortion or interference. Such application areas include electromagnetic motion capture systems, and medical systems and instruments, among others.
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Inventors:
Carfin Ego
Jones Herbert Earl Jr.
Jones Herbert Earl Jr.
Application Number:
JP2001535065A
Publication Date:
April 08, 2003
Filing Date:
October 31, 2000
Export Citation:
Assignee:
Paul Hemas Incorporated
International Classes:
G01B7/00; G01S1/02; G01S5/02; G01S19/11; G01S19/25; G01S19/48; G01V3/08; G02B27/01; G06F3/01; A61B19/00; (IPC1-7): G01B7/00
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)