Rotating optical flow vision method for vibration measurement of rotating blade structure

The invention discloses a rotating optical flow vision method for vibration measurement of a rotating blade structure. The method comprises the following steps: acquiring a vibration video of the rotating blade structure; introducing a rotation frame speed to establish a relation between a pixel point optical flow in a window and a measuring point optical flow; establishing a rotating optical flow equation set of the measuring point by adopting a circular window, and solving the rotating optical flow equation set to obtain a measuring point optical flow and a window rotating frame speed; setting the size of a follow-up frame circular window according to the measuring point optical flow of the previous frame to realize self-adaptive window size updating; and selecting an auxiliary point on the blade disc, removing the blade rigid body rotation motion by combining the auxiliary point optical flow and the window rotation frame speed, and calculating the vibration information of the rotating blade structure. Sens