Real time contactless sensor for helicopter blade angle measurement

7.4 - Optical Rotor-Blade Deformation Measurements using a Rotating Camera

“…These attempts have been done with measurement devices out of the rotating frame observing either only small rotors or the blade passing within the field of view. Former recordings with rotating camera devices on helicopter rotors have been performed just to visualize the flow over the blades [9] or to determine the motion of the rotor blade [10].…”