AN OPTICAL TRACK GAGE MEASURING DEVICE
The invention is a system for measuring the gage of railroad tracks and includes a pair of sensor probes mounted a fixed distance apart on a wheeled vehicle traveling along two rails and each located in positions horizontally adjacent to one of the rails. Each of the probes retains spaced apart first and second collimated light sources that direct first and second light beams at incident angles against the inner surface of the adjacent rail head at points five-eights of an inch from the top surface thereof. After reflection from the rail head the first and second beams produce images in an optical receiver also retained by the probe. A detector produces an output dependent upon the spacing between the first and second beam image centers which is in turn dependent upon the distance between the probe and the adjacent rail head. Thus, the measured distances provided by the two probes in addition to the fixed spacing therebetween establishes rail gage in a plane five-eights of an inch below the top surfaces of the rails.
- This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of application available NTIS.
Department of Transportation1200 New Jersey Avenue, SE
Washington, DC United States 20590
- Poirier, P J
- Publication Date: 1978-11-20
- Pagination: 13 p.
- TRT Terms: Gage (Rails); Light; Measuring instruments; Optical instruments; Optical measurement; Optics; Patent applications; Patents; Railroad tracks; Railroad trains; Signal processing
- Uncontrolled Terms: Light sources
- Old TRIS Terms: Track gauge
- Subject Areas: Railroads; Vehicles and Equipment;
- Accession Number: 00191266
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: PAT-APPL-962 239
- Files: TRIS, USDOT
- Created Date: May 11 1979 12:00AM