DRIVER CONDITION DETECTING DEVICE AND DRIVER CONDITION INFORMING DEVICE

• US 20150109429A1
• Filed: 12/29/2014
• Published: 04/23/2015
• Est. Priority Date: 07/06/2012
• Status: Abandoned Application

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: INOUE, Keisuke, ONO, Hiroshi
• Application Number:
  US14/583,972
• Publication Number:
  US 20150109429A1
• Time in Patent Office: Days
• US Class Current: 348/78
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/163 by tracking eye movement, gaze, or pupil change
• CPC Class Codes: A61B 5/18 for vehicle drivers or machine operators
• CPC Class Codes: G06V 20/597 Recognising the driver's state or behaviour, e.g. attention or drowsiness
• CPC Class Codes: G06V 40/161 Detection; Localisation; Normalisation
• CPC Class Codes: G06V 40/18 Eye characteristics, e.g. of the iris
• CPC Class Codes: G06V 40/193 Preprocessing; Feature extraction
• CPC Class Codes: G08B 21/06 indicating a condition of sleep, e.g. anti-dozing alarms

Abstract

Disclosed is a driver condition detecting device and a driver condition informing device detecting inattentive or incursive driving by movements of a head and eyeball of a driver during driving. The CPU, when the head and the eyeball of the driver are determined as not facing forward, and neither the vestibule oculogyral reflex movement nor the semicircular carnal cervix reflex movement is detected, determines and informs the inattentive driving. The CPU, even though the head and the eyeball of the driver are determined as facing forward, detects an angle-of-convergence, and determines and informs the inattentive driving when the angle-of-convergence lies above a threshold.

Claims

1. A driver condition detecting device, comprising:

a camera unit photographing a face of a driver;

a head detector detecting a movement of a head of the driver from an image photographed by the camera unit;

an eyeball detector detecting a movement of an eyeball of the driver from the image photographed by the camera unit;

a vestibule oculogyral reflex movement detector detecting a vestibule oculogyral reflex movement based on the movement of the head detected by the head detector and the movement of the eyeball detected by the eyeball detector;

a semicircular carnal cervix reflex movement detector detecting a semicircular carnal cervix reflex movement based on the movement of the head detected by the head detector and the movement of the eyeball detected by the eyeball detector;

a front face determining unit determining whether or not the head and the eyeball of the driver face forward based on the movement of the head detected by the head detector and the movement of the eyeball detected by the eyeball detector; and

an inattentive driving determining unit determining an inattentive driving,

wherein said inattentive driving determining unit actuates the vestibule oculogyral reflex movement detector and the semicircular carnal cervix reflex movement detector upon the front face determining unit determining the head and the eyeball of the driver as not facing forward, and determines as the inattentive driving upon neither the vestibule oculogyral reflex movement nor the semicircular carnal cervix reflex movement being detected.

2. The driver condition detecting device as claimed in claim 1, further comprising an angle-of-convergence detector detecting an angle of convergence of the eyeball from the image photographed by the camera unit,

wherein the inattentive driving determining unit determines the inattentive driving by the angle of convergence detected by the angle-of-convergence detector lying above a threshold upon the front face determining unit determining the head and the eyeball of the driver as not facing forward.

4. The driver condition detecting device as claimed in claim 1, further comprising a discursive condition determining unit determining a discursive condition upon an angular velocity distribution of the eyeball per unit time lying within a predetermined range.

5. The driver condition detecting device as claimed in claim 2, further comprising a discursive condition determining unit determining a discursive condition upon an angular velocity distribution of the eyeball per unit time lying within a predetermined range.

7. The driver condition detecting device as claimed in claim 1, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

8. The driver condition detecting device as claimed in claim 2, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

10. The driver condition detecting device as claimed in claim 4, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

11. The driver condition detecting device as claimed in claim 5, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

13. The driver condition detecting device as claimed in claim 7, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.

14. The driver condition detecting device as claimed in claim 8, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.

16. The driver condition detecting device as claimed in claim 10, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.

17. The driver condition detecting device as claimed in claim 11, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.

3. A driver condition detecting device, comprising:

a camera unit photographing a face of a driver;

a head detector detecting a movement of a head of the driver from an image photographed by the camera unit;

an eyeball detector detecting a movement of an eyeball of the driver from the image photographed by the camera unit;

an angle-of-convergence detector detecting an angle of convergence of the eyeball from the image photographed by the camera unit;

a front face determining unit determining whether or not the head and the eyeball of the driver face forward based on the movement of the head detected by the head detector and the movement of the eyeball detected by the eyeball detector; and

an inattentive driving determining unit determining an inattentive driving by the angle of convergence detected by the angle-of-convergence detector lying above a threshold upon the front face determining unit determining the head and the eyeball of the driver not facing forward.

6. The driver condition detecting device as claimed in claim 3, further comprising a discursive condition determining unit determining a discursive condition upon an angular velocity distribution of the eyeball per unit time lying within a predetermined range.

9. The driver condition detecting device as claimed in claim 3, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

12. The driver condition detecting device as claimed in claim 6, further comprising an informing unit informing the driver of the inattentive driving when a determination as the inattentive driving by the inattentive driving determining unit continues over an inattentive driving determining period.

15. The driver condition detecting device as claimed in claim 9, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.

18. The driver condition detecting device as claimed in claim 12, further comprising a speed detector detecting a speed of a vehicle,

wherein the informing unit sets the inattentive driving determining period short as the detected speed increases.