Research on the rapid 3D measurement of satellite antenna reflectors using stereo tracking technique

Abstract

Surface accuracy measurement and analysis are crucial steps in the manufacturing process of satellite antenna reflectors. The conventional close-range photogrammetry requires attaching target points on the surface, which is time-consuming and may damage the surface quality. To overcome these drawbacks, a non-contact three-dimensional (3D) shape rapid measurement technique was proposed, which is based on the integration of a stereo tracking method and a structured light measurement method. This paper focuses on addressing the issue of obtaining pose transformation matrices for measurement devices in motion within this method. Initially, a plane tracking scheme and tracking plate pattern was designed. Furthermore, the feature points of the tracking board were extracted from the target area of image processing. Moreover, the pose transformation matrix of the tracking plate relative to the fixed world coordinate system at different positions was obtained using the triangulation method. Finally, a measurement experiment was conducted, resulting in a stereo tracking scheme error within 0.5%.