Measuring method for determining the position and the orientation of a moving assembly, and apparatus for implementing said method
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United States of America Patent
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Oct 28, 2003
Grant Date -
Oct 24, 2002
app pub date -
Apr 24, 2002
filing date -
Apr 24, 2001
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Abstract
The invention relates to a measurement method for determining the position and the orientation of a moving assembly in a base frame of reference. According to the invention, the method comprises the steps of: taking an image of an optical reference mark associated with the moving assembly by means of a first camera having a focal axis lying in a direction that is known in the base frame of reference; taking an image of an optical reference mark associated with the first camera by means of a second camera associated with the moving assembly; measuring the distance between a point associated with the first camera and a point associated with the second camera by using self-contained measurement means that are independent of said first and second cameras; and computing the position and the orientation of the moving assembly in the base frame of reference on the basis of the images taken and of the measured distance.
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