Method for estimating the roll angle in a travelling vehicle
US8824741B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2010 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Aug 18, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2520/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for estimating the roll angle in a travelling vehicle (7), comprising the following steps. In step a), a camera (8) is used to record a sequence of images of the vehicle's surroundings, in particular of the road (1) ahead. In step b), at least one signature (S1-S6) on the road surface is extracted from the camera images, i.e. said signature is determined and tracked. The changed position of the at least one signature (S1-S6) in one or more subsequent camera image(s) is used in step c) to determine in which direction the camera (8) is turned with regard to the roll angle.The value of the roll angle is estimated in step d).For this purpose, the roll angle is either directly estimated in step d1), taking into account the vehicle speed (v) and an imaging model of the camera (8), or the roll angle is iteratively increased or decreased by a defined correction angle in step d2) until the roll angle sufficiently compensates for the turning of the camera (8). On this basis, the estimated roll angle is obtained as an overall correction value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.