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Distributed sensing system

  • US 6,285,446 B1
  • Filed: 11/16/1999
  • Issued: 09/04/2001
  • Est. Priority Date: 05/19/1997
  • Status: Expired due to Term
First Claim
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1. A method for measuring strain and temperature at a location in a structure comprising:

  • providing a structure including optical fibre, providing interferometer means positioned at a location along a length of the optical fibre where strain is to be measured, transmitting a pulse of light along the optical fibre and reflecting the light with the interferometer means wherein the reflected light includes scattered Raman Scatter Spectrum light, measuring the scattered Raman Scatter Spectrum light, and determining temperature from the measured Raman Scatter Spectrum light.

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