发明名称 |
DROWSY STATE DETERMINATION DEVICE AND METHOD |
摘要 |
A blink detection section generates an eye-closure signal indicating the duration of a period for which the driver closes his/her eyes. An eye-closure count section calculates the respective occurrence frequencies of single eye closures in a prescribed measurement period for a first eye-closure period threshold and a second eye-closure period threshold, based on the eye-closure signal and the respective eye-closure period thresholds. A drowsy state determination section compares the respective occurrence frequencies with the first eye-closure frequency threshold and the second eye-closure frequency threshold to determine which of the drowsiness levels corresponding to the respective thresholds the drowsiness level of the driver is at.
|
申请公布号 |
US2009027212(A1) |
申请公布日期 |
2009.01.29 |
申请号 |
US20080178988 |
申请日期 |
2008.07.24 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
NAKAGOSHI AKIRA;KIMURA KENJI;OKOMBI-DIBA BERTIN RODOLPHE |
分类号 |
G08B23/00 |
主分类号 |
G08B23/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|