Title:
METHOD AND SYSTEM FOR DETERMINING THE POSITION AND/OR ORIENTATION OF AN OBJECT
Document Type and Number:
WIPO Patent Application WO/2009/033552
Kind Code:
A3
Abstract:
The invention relates to a method and system for determining the position and/or orientation of an object, wherein the magnetic field generated by at least one emitter is measured by at least one field sensor on/in the object and the object position and/or object orientation in the generated magnetic field is determined, characterised in that in order to compensate for disturbances in the generated magnetic field in particular in the vicinity of the object, a reference object (1) with at least two field sensors (2a, 2b, 2c, 2d) is provided the relative spatial set positions (01, 02, 03, 04) of which are known, in particular are fixed and known, wherein the electromagnetic field is measured by means of the field sensors (2a, 2b, 2c, 2d) of the reference object (1) and from the measured value(s) erroneous actual positions (V1, V2, V3, V4) of the field sensors (2a, 2b, 2c, 2d) of the reference object (1 ) are determined, and a correction determined by means of the deviations between actual and set positions by means of which the measured object position (P1', P2') and/or object orientation is corrected especially in real time.
Inventors:
ELFRING ROBERT (DE)
DE LA FUENTE KLEIN MATIAS (DE)
RADERMACHER KLAUS (DE)
DE LA FUENTE KLEIN MATIAS (DE)
RADERMACHER KLAUS (DE)
Application Number:
PCT/EP2008/006830
Publication Date:
July 15, 2010
Filing Date:
August 20, 2008
Export Citation:
Assignee:
RWTH AACHEN (DE)
ELFRING ROBERT (DE)
DE LA FUENTE KLEIN MATIAS (DE)
RADERMACHER KLAUS (DE)
ELFRING ROBERT (DE)
DE LA FUENTE KLEIN MATIAS (DE)
RADERMACHER KLAUS (DE)
International Classes:
G01B7/00; A61B5/06
Domestic Patent References:
| WO1996032059A1 | 1996-10-17 | |||
| WO2006054295A1 | 2006-05-26 |
Foreign References:
| US20070150195A1 | 2007-06-28 | |||
| US6516213B1 | 2003-02-04 | |||
| US20030201767A1 | 2003-10-30 | |||
| US20070085027A1 | 2007-04-19 | |||
| US20070165779A1 | 2007-07-19 | |||
| US20070124076A1 | 2007-05-31 | |||
| US7060075B2 | 2006-06-13 | |||
| US6129668A | 2000-10-10 | |||
| US20050107808A1 | 2005-05-19 |
Attorney, Agent or Firm:
COHAUSZ DAWIDOWICZ HANNIG & SOZIEN (Düsseldorf, DE)
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