Method and system for simultaneous measurement of strain and temperature
AssigneeOZ Optics Ltd.
InventorsLufan Zou, Omur M. Sezerman
Life of this patent
Estimating the term…
Abstract
A method and system for simultaneously measuring strain and temperature characteristics of an object involves the attachment to the object of a pair of optical fibers having different refractive indices, the fibers being connected together at least one end thereof, and directing laser light into at least one end of the fibers. The Brillouin frequency of each of the fibers is measure and the strain and temperature characteristics are calculated based on the coefficients of strain and temperature and the measured Brillouin frequencies of the fibers.
Claims13
A method of simultaneously determining strain and temperature characteristics of an object comprising the steps of:
- providing first and second optical fibers having different refractive indices;
- determining coefficients of strain and temperature for each of said fibers;
- connecting said fibers together at at least one end thereof;
- securing said fibers to said object along a length thereof;
- inputting laser light into at least one of said fibers at the other ends thereof;
- measuring the Brillouin frequency for each of said fibers;
- and
- calculating strain and temperature characteristics based on the coefficients of strain and temperature and the measured Brillouin frequencies for said fibers.
A system for simultaneously determining strain and temperature characteristics of an object comprising:
- first and second optical fibers having different refractive indices;
- means connecting said first and second fibers together at at least one end thereof;
- means securing said fibers to the object to be monitored;
- laser means for inputting laser light into at least one of said fibers at the other ends thereof;
- means for measuring the Brillouin frequency for each of said fibers;
- and
- means for calculating strain and temperature characteristics based on the coefficients of strain and temperature as well as the measured Brillouin frequencies for said fibers.
Dependencies are inferred from the claim text.