Apparatus mounted on vehicles for detecting road surface conditions
US4653316A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1986 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Mar 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A road surface is scanned with a laser beam in a direction transverse to the road surface to pick up the scanning locus of the laser beam on the road surface in a direction inclined to a beam scanning surface so as to obtain transverse profile data. The laser light reflected from the road surface is received in a direction inclined to the beam scanning surface for obtaining crack data. The distances to the road at three points in the longitudinal direction of a measuring car are measured. The running distance of the car is measured and the measured distance data are recorded in a recording device together with crack data, transverse profile data and longitudinal profile data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.