Wind Power

3D metrology for rotor blades and plant construction

Wind Power

Efficient inspection of rotor blades, mounting surfaces and plants

Modern wind farms play an important role in our electricity supply. Here, turbines must be inspected with maximum efficiency. With 3D measurement technology, mounting surfaces, e.g. for offshore wind farms, can be inspected quickly and easily. 3D data are also used to inspect the production and wear of rotor blades to optimize production and repair.

Inspection of mounting surfaces on wind turbines

The individual construction segments of wind turbines sometimes only meet for the first time during assembly at the final site. Using the portable TRITOP photogrammetry system, mounting bolts and surfaces can be measured and inspected in less than one hour. This is also possible for off-shore foundations or structural parts. Thus, mounting bolts that are not in the correct position can be identified and adjusted before the actual setup. This ensures smooth assembly of wind turbines without the risk of additional costs or delays.

3D inspection of rotor blades

Having information about the form of the effective surfaces of rotor blades and turbines is vital to control and optimize production processes. Using GOM's optical metrology, the shapes and dimensions of rotor blades can be checked against CAD or a master data set either full-field or point-based. The measuring data is also used via reverse engineering for a surface reconstruction and to copy an optimal rotor.

Bending fatigue testing of rotor blades

Rotor blades are exposed to high stresses on account of their own weight and the impact of irregular wind loads. For this reason, they are subjected to extensive bench tests to verify their operational stability and strength. Their behavior is analyzed under normal and shear stress up to the point of bending fracture. For the precise analysis of strain and deformation on rotor blade surfaces, the mobile and flexible optical measuring systems from GOM can be integrated quickly and easily in rotor blade test benches. This provides valuable information on the behavior of rotor blade structures in terms of strength and local tensile and strain properties. The optical measuring data can also be used to verify simulation computation and enable the continuous optimization of wind turbines.

Dynamic deformation analysis of wind turbines during running operation

GOM’s dynamic online deformation measuring systems are standard tools for measuring and visualizing deformations on aerodynamically loaded structures. This technology is also used to analyze the overall structure of wind energy converters (WEC) to perform modal analyses and to monitor the vibration behavior during operation. Acceleration, deformation (torsion, bending etc.) and the angular position of the rotor blades as well as vibrations of the entire plant and the deflection of the tower under wind load and emergency braking are analyzed.