Title:
DRIVER STATE ASSESSMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/090045
Kind Code:
A1
Abstract:
[Problem] To provide a driver state determination device that can divide changes in the autonomic nerve state of a driver during driving into a change caused by an intrinsic factor and a change caused by an extrinsic factor to thereby make determination. [Solution] A driver state determination device 1 comprises: a pulse sensor 3 that detects the heartbeat of the driver; an illuminance sensor 2 that detects an ambient illuminance value; and a computational processing unit 4 that determines the autonomic state of the driver on the basis of heartbeat variation obtained from the results of the detection by the heartbeat sensor 3 and a change in ambient brightness obtained from the result of the detection by the illuminance sensor 2. The computational processing unit 4 determines that the sympathetic nerve of the autonomic nerves has been activated by an extrinsic factor when the heartbeat variation of the driver increases, the ambient brightness changes from a bright condition to a dark condition and thereafter does not change from the dark condition, and the heartbeat variation of the driver starts to decrease. Meanwhile, the computational processing unit 4 determines that the parasympathetic of the autonomic nerves has been activated by an intrinsic factor when the ambient brightness does not change from the dark condition and the heartbeat variation of the driver does not start to decrease.
Inventors:
ITO YUSUKE (JP)
Application Number:
PCT/JP2022/039161
Publication Date:
May 25, 2023
Filing Date:
October 20, 2022
Export Citation:
Assignee:
YAZAKI CORP (JP)
International Classes:
G08G1/16; A61B5/16; A61B5/18; A61B5/352
Foreign References:
| JP2009039167A | 2009-02-26 | |||
| JP2016191985A | 2016-11-10 | |||
| JP2018205794A | 2018-12-27 | |||
| JP2016139258A | 2016-08-04 | |||
| JP2006011656A | 2006-01-12 |
Attorney, Agent or Firm:
TORANOMON INTELLECTUAL PROPERTY FIRM (JP)
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