Driver's arousal level estimating apparatus for vehicle and method of estimating arousal level
US6335689B1 · kind B1 · utility
19Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Oct 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A lateral displacement of a vehicle is detected consecutively and the displacement is subjected to a frequency conversion to obtain a frequency component power. Then, a first integral of the frequency component power is obtained with respect to frequency of a low frequency domain and a second integral of the power is obtained with respect to frequency of a high frequency domain. An evaluation value is calculated from thus obtained first and second integrals and a driver's arousal level is judged based on the evaluation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.