Detecting rail defects
US7516662B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Nov 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting defects in a railway track rail, the rail (101) having a longitudinal centre plane and a surface, the surface including a running surface (102), the method comprising directing an excitation laser beam (106) to an excitation position (103) on the surface of the rail (101) to induce an ultrasonic wave in the rail (101); and directing a detection laser beam (108) to a detection position (104) on the surface of the rail (101) to detect at least one predetermined property of the induced ultrasonic wave; wherein the excitation position (103) and the detection position (104) are located on the running surface (102) and displaced from the longitudinal centre plane of the rail (101).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.