Patent ID: 11858419
Assignee: TIANJIN CHENGJIAN UNIVERSITY
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 4:
5. The fatigue driving monitoring, reminding and early-warning system according to claim 4, wherein the fatigue level is one of four levels including: normal state, mild fatigue, moderate fatigue and severe fatigue;
wherein the normal state is that:
the driving time is less than or equal to 3 hours since the vehicle is started, and during which none of the fatigue characteristic postures of the driver has been detected;

wherein the mild fatigue is selected from the group consisting of that:
(1) the driving time is more than 3 hours and less than 3.5 hours since the vehicle is started, and during which none of the fatigue characteristic postures of the driver has been detected;
(2) the driving time is less than 3 hours since the vehicle is started, and during which the first-level fatigue characteristic posture of the driver has been detected once; and
(3) the driving time is less than 2 hours since the vehicle is started, and during which the second-level fatigue characteristic posture of the driver has been detected once;

wherein the moderate fatigue is selected from the group consisting of that:
(1) the driving time is more than 3.5 hours and less than 4 hours since the vehicle is started, and during which none of the fatigue characteristic postures of the driver has been detected;
(2) the driving time is more than 3 hours and less than 4 hours since the vehicle is started, and during which the first-level fatigue characteristic posture of the driver has been detected once;
(3) the driving time is more than 2 hours and less than 3.5 hours since the vehicle is started, and during which the second-level fatigue characteristic posture of the driver has been detected once;
(4) the driving time is less than 3 hours since the vehicle is started, and during which another first-level fatigue characteristic posture of the driver occurs within 10 minutes after one first-level fatigue characteristic posture of the driver has been detected;
(5) the driving time is less than 2.5 hours since the vehicle is started, and during which one second-level fatigue characteristic posture of the driver occurs within 10 minutes after one first-level fatigue characteristic posture of the driver has been detected;
(6) the driving time is less than 2.5 hours since the vehicle is started, and during which one first-level fatigue characteristic posture of the driver occurs within 10 minutes after one second-level fatigue characteristic posture of the driver has been detected; and
(7) the driving time is less than 2 hours since the vehicle is started, and during which another second-level fatigue characteristic posture of the driver within 10 minutes after one second-level fatigue characteristic posture of the driver has been detected;

wherein the severe fatigue is selected from the group consisting of that:
(1) in any case where the driving time is greater than or equal to 4 hours;
(2) the third-level fatigue characteristic posture of the driver has been detected once or more than once in any driving time since the vehicle is started;
(3) the driving time is more than 3.5 hours since the vehicle is started, and during which the second-level fatigue characteristic posture of the driver has been detected once;
(4) the driving time is more than 3 hours since the vehicle is started, and during which another first-level fatigue characteristic posture of the driver occurs within 10 minutes after one first-level fatigue characteristic posture of the driver has been detected;
(5) the driving time is more than 2.5 hours since the vehicle is started, and during which one second-level fatigue characteristic posture of the driver occurs within 10 minutes after one first-level fatigue characteristic posture of the driver has been detected;
(6) the driving time is more than 2.5 hours since the vehicle is started, and during which one first-level fatigue characteristic posture of the driver occurs within 10 minutes after one second-level fatigue characteristic posture of the driver has been detected; and
(7) the driving time is more than 2 hours since the vehicle is started, and during which another second-level fatigue characteristic posture of the driver within 10 minutes after one second-level fatigue characteristic posture of the driver has been detected.