Track reference targets and method of using same to define left and right top-of-rail elevations
US9784565B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | May 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C5/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dimension measuring system and method are provided. Two track reference target (TRT) assemblies are positioned at spaced-apart locations on a railroad track's rails. Each of the TRT assemblies has two targets at fixed positions in a plane perpendicular to the rails. For each of the TRT assemblies, at least one of the two targets is positioned at a known and fixed height over one of the rails. A laser-based distance measuring device measures vector distances to the two targets associated with each of the TRT assemblies. The vector distances are processed in combination with the fixed positions to determine an elevation of each of the rails in the plane associated with each of the TRT assemblies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.