A local area UAS detection system from an elevated observation position

摘要

We present a new approach to an optical UAS detection system that confirms several requirements specified by theauthorities. Our UAS detection system consists of a ground unit and a convex mirror located in the air. The ground basedunit contains high resolution camera system mounted on a pan tilt unit. Therefore, the lens of the camera system can beactively aligned to a convex mirror which is located in vertical distance over the ground unit on the lower side of a raisedcaptive balloon. The focal length of the ground based lens, the altitude of the balloon and the curvature of the mirrordefine the field of view towards the ground. The recorded video streams are processed in a vision system using changedetection and other algorithms to alert a UAS intrusion. We will outline the design parameters of the optical system, therequirements and the implementation of the mechanical system as well as the active alignment system and show firstresults of outdoor operation.