System and method for detecting driver drowsiness of a vehicle
US4581607A · kind A · utility
15Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1984 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Feb 15, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2540/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for detecting driver drowsiness on the basis of steering pulses, each steering pulse being produced whenever a steering wheel is rotated through a predetermined angle and indicating the direction of rotation of the steering wheel, comprising means for detecting the roughness of the road surface on which the vehicle is travelling and interrupting the detection of driver drowsiness for a fixed interval of time when the road surface roughness exceeds an acceptable level, i.e. a level conductive to accurate drowsiness detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.