Vehicular tilt-sensing method and automatic headlight leveling system using the same
US8600111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2009 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Sep 3, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/324
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a vehicular tilt-sensing method and an automatic headlight leveling system using the same. The method of the present invention comprises steps: using an image capture device to capture an image of the road and obtain at least one instantaneous lane marking line from the image; extending the instantaneous lane marking lines afar to obtain an instantaneous vanishing point; establishing an instantaneous horizontal line passing through the instantaneous vanishing point; calculating from the image the displacement between a datum horizontal line and the instantaneous horizontal line; and calculating the tilt angle with the displacement and the focal length of the image; using the tilt angle to generate a control signal to control level adjusting controllers to adjust headlights, whereby the headlights can provide optimized illumination to enhance night driving safety on a rugged road or in the case that the vehicle is unevenly loaded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.