Alarm system and method for sensing a stand-by state in a driver drowsiness detection system
US4611199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1984 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Feb 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drowsiness alarm system and method for use in automotive vehicles is set to a stand-by state in response to a specific sequence of steering wheel maneuvers which may reflect driver drowsiness, for example, a relatively long period during which the steering wheel is not turned followed by an abrupt steering adjustment. From the standby state, an alarm or display alerting the driver will be generated in response to another sequence of steering maneuver confirming driver drowsiness. The second sequence of maneuvers may be selected from among a number of conventional steering behavior criteria. If driver drowsiness is not confirmed within a predetermined period of time after initiation of the stand-by state, the system is reset to its initial state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.