Stress tests in the rotor test bench

Rotor blades for wind turbines are inspected in test rigs that simulate real loads caused by wind and weather. The tip of the rotor blade can be distorted by up to 10m due to mechanical loads. Several draw-wire sensors are used on the test rig to monitor the deformation. Two sensors per traction point measure the deflection and torsion of the rotor blade. In this measurement task, the draw-wire sensors operate with measuring ranges between 3 and 10 m. The output digital signal is used for further simulations.