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Fiber optic shape sensing

  • US 8,116,601 B2
  • Filed: 04/21/2010
  • Issued: 02/14/2012
  • Est. Priority Date: 06/30/2008
  • Status: Active Grant
First Claim
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1. A shape sensing method, comprising:

  • defining a lengthwise first segment in an optical fiber;

    defining a first three-dimensional reference frame at a start location of the first segment;

    interrogating the optical fiber for data associated with strain in the optical fiber;

    outputting first bend information associated with the first segment, wherein the first bend information comprises a Cartesian position at an end location of the first segment with respect to the first reference frame and a Cartesian orientation of the end location with respect to the first reference frame;

    defining a lengthwise second segment in the optical fiber;

    defining a second three-dimensional reference frame at a start location of the second segment; and

    outputting second bend information associated with the second segment, wherein the second bend information comprises a Cartesian position of an end location of the second segment with respect to the second reference frame and a Cartesian orientation of the end location with respect to the second reference frame.

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