Dozing warning device for a vehicle
US4518954A · kind A · utility
14Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | May 6, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2540/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A warning device detects abrupt steering when the driver is dozing at the wheel and recognizes dozing of the driver to give a warning. The warning device comprises a sensor 20 for detecting steering variation angle, circuit 120, 130 for detecting abrupt steering based on detected right- and left-hand steering angle variations, and circuits 142, 146 for operating a warning means 30 when abrupt steering to the left and abrupt steering to the right are consecutively detected within a given period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.