Fiber Bragg Grating strain sensors for monitoring both wind turbine blades and offshore platforms

The use of Fiber Bragg Grating (FBG) sensors is widespread due to its small diameter, light weight, high strength, high sensitivity, being non-electrical and their corrosive resistance. A broadband light is emitted from a source and the FBG reflects one narrow wavelength. Measuring the wavelength shift, it is possible to determine the deformation the fiber has undergone. This system is suitable for long-term monitoring as it does not need any extra maintenance.