Gamesa Innovation & Technology, S.l.

Airbus Espana, S.l.

Alfredo Güemes Gordo

José Manuel Menéndez Martin

Miguel Riezu Corpas

Alfredo Criado Abad

Antonio Fernandez Lopez

A current transformer () having a plurality of primary and secondary windings, comprising a top Strain measuring system of wind turbine blades () during the performance of static tests that comprises an equipment for measuring the strain at multiple locations in mono-mode optical fibers () using Rayleigh scattered light, that includes an OBR interrogator (), an interface device () and an Acquisition System (), said mono-mode optical fibers () being attached to the blade () subjected to said tests for obtaining high spatial resolution measurements of the blade strain during said tests. Said optical fibers () may be placed whether in a longitudinal direction or in a non-longitudinal direction or in a non-linear shape in given blade sections and may be bonded whether to the outer skin () of the blade (), or into grooves () in the outer skin () of the blade () or embedded between two structural laminates () of the blade ().

Wind turbine blades strain measuring system during static tests

A method of monitoring structural damage in a composite structure manufactured by co-curing, co-bonding or secondary bonding of several sub-components (), using fibre optic Bragg grating sensors attached or embedded to or between (in the bonding line) said sub-components, comprising a first step of measuring the wavelength spectra () of said Bragg grating sensors at the end of the manufacturing of the part, and in a known load condition, considered as reference and a second step of identifying the occurrence of a failure of the structure and the progress of said failure detecting the release of the residual stresses/strains stored during the curing process by measuring changes (tototo) with respect to said reference wavelength spectra.

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Madrid, Spain

Alfredo Güemes Gordo