Method and apparatus for track geometry measurement
US6634112B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2002 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Apr 4, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the geometry of a rail for a railroad track which includes mounting first and second cameras in back to back relationship to create a single camera axis passing through the camera lenses and to define a coordinate system with an origin centered between the cameras on the camera axis. First and second targets are placed on the rail to be measured and spaced an equal distance from the origin between first and second cameras respectively. The first and second cameras record the position of the first and second targets and provide position signals from which the mid-chord value of a chord extending between the first and second targets is computed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.