| 摘要 |
A system (3) arranged in an aerial vehicle (1) for determining the position of the aerial vehicle (1) relative to the centre of a remote predetermined landing area (14) arranged on a surface (2), comprising beam emitting means (4,5) arranged to emit beams towards the surface (2), detector means (8) arranged to detect the beams reflected from said surface (2). According to the invention the system control means (6,7) arranged to control said beam emitting means (4,5) to emit beams onto said surface (2) to form a plurality of lines thereon, and processing means (9) arranged to detect at least one edge (13) providing a difference in height relative to the surface (2), on basis of the detected reflected line forming beams, wherein said edge (13) substantially surrounds the predetermined landing area (14), and wherein the processing means (9) further are arranged to determine the position of the aerial vehicle (1) relative to the centre of the remote predetermined landing area (14), on basis of the detected at least one edge (13). |
