Optical device for measuring moving speed of an object relative to a surface
US7948613B2 · kind B2 · utility
13Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jul 2, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2250/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to sensors of the speed of movement of a vehicle over the ground. The sensor comprises illumination means for illuminating the surface and at least one optical sensor able to detect the radiation returned by the surface. The illumination means and the optical sensor have one and the same optical axis, oblique in relation to the surface. This arrangement eliminates the risks of specular reflection dazzling the sensor while avoiding disturbance of the measurement by variations in the height of the sensor relative to the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.