Method for gauging a track position
View Patent ↗A method for gauging a track position uses a track gauging trolley ( 7 ) moved on the track. A gauging run is carried out with the track gauging trolley ( 7 ), a GPS antenna ( 8 ) and an RTK GPS receiver ( 11 ) that communicates with an RTK correction data service (RTK-KD), wherein at least one wheel ( 10 ) of the track gauging trolley ( 7 ) is pressed against a rail ( 4 ). Using boundary conditions such as constraint positions, constraint points and maximum permissible track position corrections, to avoid the disadvantages of the drifts of an inertial gauging system during long gauging runs and the only relative information on the track position, the position of the GPS antenna ( 8 ) with respect to a reference axis of the track ( 4, 10 ) is determined with the aid of a compensation scanner ( 6 ) and a computing unit ( 13 ), and the measured GPS coordinates are converted into Cartesian coordinates (Pi(xi, yi, zi)) recorded with the computing unit ( 13 ) as a spatial curve ( 3 ), from which the location image ( 1 ), from which a desired curvature image (ksoll) is calculated, and the longitudinal image ( 2 ), from which a desired longitudinal inclination image (Nsoll) is calculated, are formed. An inertial system (INS) is set up on the gauging trolley ( 7 ), with which inertial system a correction spatial curve of the same section is created, and recorded using the computing unit ( 13 ) and is used as a correction value for the GPS coordinates converted into Cartesian coordinates (Pi(xi, yi, zi)).
1. A method for gauging a track position using a track gauging trolley supported for movement on a track, said method comprising:
carrying out a gauging run with the track gauging trolley, a GPS antenna, and an RTK-GPS receiver that communicates with an RTK correction data service, wherein at least one wheel of the track gauging trolley is pressed against a rail; including
determining a position of the GPS antenna with respect to a reference axis of the track using a compensation scanner and a computing unit, and
converting measured GPS coordinates into Cartesian coordinates (P i (x i , y i , z i )) and storing the converted GPS coordinates with the computing unit so as to form a spatial curve of a section;
forming from the spatial curve a location image and a longitudinal image;
calculating a nominal curvature image (GPS xysoll ) from the location image; and
calculating a nominal longitudinal inclination image (N soll ) from the longitudinal image; and
wherein an inertial system is set up on the track gauging trolley, and the method further comprises
producing with said inertial system a correction spatial curve of the section;
recording the correction spatial curve using the computing unit; and
using the correction spatial curve to produce a correction value for the converted GPS coordinates.
2. The method according to claim 1 , wherein the correction value is determined from a difference of actual values and nominal values from the location image and the longitudinal image, wherein the actual values are derived from the correction spatial curve determined by the inertial system and the nominal values are derived from the nominal curvature image (GPS xysoll ).
3. The method according to claim 1 , wherein the correction spatial curve generated by the inertial system is used as the spatial curve when the spatial curve has data of the GPS coordinates missing therefrom.
4. The method according to claim 1 , wherein the compensation scanner comprises a laser scanner that determines a relative position of the GPS antenna to the rail.
5. The method according to claim 4 , wherein, the laser determines the relative position of the GPS antenna to the rail determining an inclination of a machine frame and a distance thereof from the track gauging trolley.
6. The method according to claim 2 , wherein the correction spatial curve generated by the inertial system is used as the spatial curve when the spatial curve has data of the GPS coordinates missing therefrom.
7. The method according to claim 6 , wherein the compensation scanner comprises a laser scanner that determines a relative position of the GPS antenna to the rail.
8. The method according to claim 2 , wherein the compensation scanner comprises a laser scanner that determines a relative position of the GPS antenna to the rail.
9. The method according to claim 3 , wherein the compensation scanner comprises a laser scanner that determines a relative position of the GPS antenna to the rail.
10. The method according to claim 7 , wherein, the laser determines the relative position of the GPS antenna to the rail by determining an inclination of a machine frame and a distance thereof from the track gauging trolley.
11. The method according to claim 8 , wherein, the laser determines the relative position of the GPS antenna to the rail by determining an inclination of a machine frame and a distance thereof from the track gauging trolley.
12. The method according to claim 9 , wherein, the laser determines the relative position of the GPS antenna to the rail by determining an inclination of a machine frame and a distance thereof from the track gauging trolley.