| 摘要 |
The present invention relates to a system comprised of two laser optical sensing devices (8) for sensing rail (1) head arranged in the spring-loaded manner on a frame (2) of a rail vehicle undercarriage, or direct on the rail vehicle undercarriage. One of the two laser optical sensing devices (8) is arranged in front of the first wheel set (3) wheel in the direction of the rail vehicle movement, while the other of the two laser optical sensing devices (8) is arranged behind the second wheel set (4) wheel in the direction of the rail vehicle movement on the same lateral side of the undercarriage. After the rail (1) profiles are measured, a computer program evaluates transversal shift dy relative to each other. The shift dy and a known distance of both the laser optical sensing devices (8) in the rail (1) longitudinal direction dx serve for evaluation of the undercarriage frame (2) angle of approach according to the relationship {alpha} = arctan(dy/dx). The system is supplemented by a motion sensor (14) for measuring longitudinal movements dx1, dx2 in the guide of the first wheel set (3), situated on the outside of each wheel of the first wheel set (3), on the wheel set axis or similarly on the other wheel set (4). The distance of both the sensors (14) from each other is given by a transversal pitch 2w. From longitudinal movements dx1 and dx2 and the transversal pitch 2w, there is evaluated the angle of the wheel set relative to the undercarriage frame (2) according to the relationship {alpha} = arctan[(dx1+dx2)/(2w)]. The wheel set angle of approach is then evaluated as a sum of the determined angles of approach of the undercarriage frame (2) in the track and of the wheel set relative to the undercarriage frame (2) according to the relationship {beta} = {alpha} + {gamma} + arcsin (a/R), wherein a is the half of the undercarriage wheelbase and R denotes the radius of the negotiated curve. Each laser optical sensing device (8) is arranged within a spring-loaded cover (7), which is spring-loadedly mounted onto the undercarriage frame (2) in a holder (6) that is attached by means of a bracket (5) to the undercarriage frame (2) being spring-loaded relative to the wheel set (3) or the wheel set (4). The spring loading of the cover (7) relative to the holder (6) is made by means of at least one spring-loading assembly (11) that is formed by spring mounting bodies (10), a coupling element (12), and connecting elements (13). |
