Sensing strain and temperature

Details Sensing strain and temperature Sensing strain and temperature

G - Physics

01

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73/55

G01L 1/24 (2006.01) G01B 11/16 (2006.01) G01K 11/00 (2006.01) G01K 11/32 (2006.01)

Patent

CA 1290589

ABSTRACT SENSING STRAIN AND TEMPERATURE An optical fibre sensor 11 has two monomode cores 13,14 arranged in a common cladding 15 to allow cross- talk of optical signals between the cores as a function of strain, temperature and optical wavelength. Optical signals are generated by a generator 16 at two wavelengths, at one of which cross-talk between the cores 13,14 is temperature independent. The generated optical signals are injected into the element 11 via an optical fibre lead 18 having a single monomode core 19 which is connected to one of the cores 13 of the element 11 at one end thereof and after cross-talk between the cores, optical signals are extracted from the element, for example via the same lead 18, and processed to determine temperature and strain at the element.

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