Lane-following system by detection of lane marking
US6580986B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jul 27, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2201/087
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A CCD camera or equivalent sensor is mounted on a vehicle and used to detect lane markings (usually the white or yellow painted lines) on a roadway. An electric motor coupled to a steering system is used to provide a torque input to the steering, which may either assist or oppose the steering torque from a driver. A steering controller is designed to assist the driver to maintain the vehicle lane position by holding the vehicle at a target point using a biasing torque. The controller resumes application of the biasing torque upon expiration of a predetermined period of delay time since a change from the absence of detection of lane marking to the presence of detection of lane marking after the presence of detection of lane marking that continues for a period of time less than a predetermined period of time has occurred a predetermined number of times within a predetermined period of monitoring time or the absence of detection of lane marking continues for a predetermined period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.