Driver monitoring system and driver monitoring method

1. A driver monitoring system comprising:

an automated driving controller that allows hands-off operation in which a driver releases hands from a steering wheel of a vehicle, and controls an automated steering driving in which the vehicle is automatically steered; and

a request notification controller that notifies a hands-on request for prompting the driver of the vehicle to perform a hands-on operation to hold the steering wheel, or a surrounding confirmation request for prompting the driver to perform a surrounding confirmation operation to confirm a surrounding condition,

wherein during the automated steering driving, the request notification controller is configured to notify the hands-on request or the surrounding confirmation request again when an elapsed time from notification of the hands-on request or the surrounding confirmation request exceeds a criterion time;

further comprising information acquisition equipment to acquire vehicle surrounding information of the vehicle,

wherein during the automated steering driving, the request notification controller is configured to execute criterion time setting control for setting the criterion time in accordance with the vehicle surrounding information detected by the information acquisition equipment;

wherein the vehicle surrounding information includes information about a preceding vehicle of the vehicle, and

wherein, in the determination reference time setting control, the request notification controller is configured to set the criterion time longer when the preceding vehicle exists than when the preceding vehicle does not exist.

2. The driver monitoring system according to claim 1 , further comprising a steering touch sensor for detecting a steering information of the steering wheel,

wherein during the automated steering driving, the request notification controller is configured to reset the elapsed time when an execution of the hands-on operation is determined based on the steering information.

3. The driver monitoring system according to claim 1 , further comprising a driver monitor for monitoring a status of the driver of the vehicle,

wherein during the automated steering driving, the request notification controller is configured to reset the elapsed time when an execution of the surrounding confirmation operation is determined based on the driver monitor information obtained from the driver monitor.

4. The driver monitoring system according to claim 1 ,

wherein the vehicle surrounding information includes surrounding environment information transmitted from a road-side machine, and

wherein in the criterion time setting control, the request notification controller is configured to set the criterion time to be longer when the surrounding environment information includes alert information to urge the driver to pay attention.

5. The driver monitoring system according to claim 1 ,

wherein the vehicle surrounding information includes map information,

wherein the map information includes information relating to an alert section to urge the driver to pay attention, and

wherein in the criterion time setting control, the request notification controller is configured to set the criterion time to be longer when the current position of the vehicle belongs to the alert section than when the current position does not belong to the alert section.

6. The driver monitoring system according to claim 1 ,

wherein the automated driving controller is configured to execute a driver warning control for providing a warning to the driver when an indication related to a decrease in a driver's attention is detected, and

wherein in the criterion time setting control, when the warning is performed by the driver warning control, the request notification controller is configured to set the criterion time to be shorter than before the warning is performed.

7. The driver monitoring system according to claim 1 ,

wherein in the criterion time setting control, the request notification controller is configured to notify the driver of a reason for change when the criterion time is changed.

8. A driver monitoring method applied to a vehicle, the vehicle comprising an automated driving controller that allows hands-off operation in which a driver releases hands from a steering wheel of the vehicle, and controls an automated steering driving in which the vehicle is automatically steered, and a request notification controller that notifies a hands-on request for prompting the driver of the vehicle to perform a hands-on operation to hold the steering wheel, or a surrounding confirmation request for prompting the driver to perform a surrounding confirmation operation to confirm a surrounding condition,

the driver monitoring method comprising a process of, during the automated steering driving, notifying the hands-on request or the surrounding confirmation request again when an elapsed time from notification of the hands-on request or the surrounding confirmation request exceeds a criterion time;

acquiring vehicle surrounding information of the vehicle,

during the automated steering driving, executing criterion time setting control for setting the criterion time in accordance with the vehicle surrounding information;

wherein the vehicle surrounding information includes information about a preceding vehicle of the vehicle, and

setting the criterion time longer when the preceding vehicle exists than when the preceding vehicle does not exist.