Rotational Operating Deflection Shapes Analysis with High-Speed Camera

By using high-speed cameras, non-contact and high-resolution measurements of vibrations are possible for beginners and experts with little configuration effort. This makes surface measurements feasible, where each image pixel can be used as a vibration sensor. By using optical flow algorithms, measurements are possible without pretreatment of the target. This also applies to color homogeneous structures. This technique is very well suited for vibration analysis and online condition monitoring of buildings, such as bridges and wind turbines. Within the scope of this chapter, this technique is used for the first time to investigate the model of a wind turbine in terms of an order-based operating deflection shapes analysis. In addition to the deformation data, the speed signal will also be generated from the video to perform an order analysis, so that the operating deflection shape analysis can be visualized depending on the order or speed.