| 摘要 |
An apparatus for measuring the characteristic parameters of an overhead railway or tramway line, characterised by comprising, on board a railway or tramway vehicle (25): at least one laser source (2) for generating a laser beam, optical means for transforming said laser beam, generated by said source (2), into a flat beam (4), means for orientating the axis of said flat beam (4) at an angle other than 90 DEG to the axis of the overhead line wire (6) and defining with this latter a plane substantially perpendicular to the plane of said beam (4), at least one video camera (8) having its optical axis different form the axis of said flat beam but lying in said perpendicular plane and orientated towards the light-emitting line of intersection of said laser beam (4) with said wire (6), the apparatus also comprising a processing unit for the signals generated by said video camera (8) in order to determine the position of said light-emitting line within the optical field to said video camera (8), and to effect reconstruction of the real profile of said wire (6) and its comparison with the theoretical profile of the wire itself. |
