Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Railway vehicle
Reexamination Certificate
2005-04-28
2009-06-02
Jeanglaud, Gertrude Arthur (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Railway vehicle
C246S033000
Reexamination Certificate
active
07542830
ABSTRACT:
This invention includes a method for estimating the shape of a section of railroad track from so-called chord offsets measured along it without prior assumptions about the locations and orientations of arcs and tangents that together could define a shape to which the track might be made to conform. This invention also includes a method for finding a configuration of tangents, arcs, and spirals that are as close as practical to a set of existing points along a section of track and that can define a desired shape for calculating instructions to a track lining machine.
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