System and method for detecting driver drowsiness including detection of steering rotation and reversal
US4604611A · kind A · utility
33Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Feb 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for detecting driver drowsiness in an automotive vehicle employs means for detecting changes in steering direction of a steering wheel on the basis of steering pulses, each steering pulse being produced whenever the steering wheel is rotated through a predetermined angle, and determines that the vehicle driver is drowsy when the number of steering pulses within a fixed interval of time exceeds a first reference value and the number of steering reversals within the fixed interval of time is below a second preset reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.