Wind energy installation comprising a wind speed measuring system

摘要

The invention relates to a wind energy installation (1) including a rotor (4) comprising at least one rotor blade (5) wherein the wind energy installation (1) comprises at least one wind speed measuring system which optically measures the vibrations of an optical fiber (7) due to vortex shedding.
Optionally, several Bragg grid grating sensors may be arranged on a single optical fiber, with wavelength multiplexing to distinguish their signals.