Driver assistance system and driver assistance method

A driver assistance system comprising:

• a controller configured to receive gripping information including at least one of a contact area, a contact position, and a contact pressure from a gripping detection sensor provided on a steering wheel of a vehicle and configured to detect a driver gripping the steering wheel by measuring any one of capacitance, a change in resistance, and a change in temperature to acquire the gripping information, receive driver identification information from a driver identification device of the vehicle, receive behavior information of the vehicle including any one of a vehicle speed, a steering angle, a yaw rate, a lateral acceleration, and a longitudinal acceleration, and determine whether the driver is dozing,
• wherein the controller is configured to:
• match the gripping information received from the gripping detection sensor with the behavior information of the vehicle for the identified driver, and separately store a result of the matching for the identified driver;
• generate gripping prediction information by predicting gripping information according to current behavior information of the vehicle based on the separately stored result of the matching to represent a learned gripping pattern of the identified driver corresponding to the current behavior information;
• and
• determine whether the driver is dozing by determining an error between current gripping information, detected by the gripping detection sensor, and the gripping prediction information generated based on the current behavior information of the vehicle including at least one of the vehicle speed, the steering angle, the yaw rate, the lateral acceleration, and the longitudinal acceleration of the vehicle, and by determining that the driver is dozing when the determined error is out of a predetermined range.

A driver assistance method comprising:

• matching gripping information on a driver gripping a steering wheel according to behavior information of a vehicle;
• and
• generating gripping prediction information based on a result of the matching, and determining an error between current gripping information and the gripping prediction information according to current behavior information of the vehicle and determining whether the driver is dozing,
• wherein the matching includes receiving driver identification information from a driver identification device of the vehicle, detecting the driver gripping the steering wheel by measuring any one of capacitance, a change in resistance, and a change in temperature to acquire the gripping information including at least one of a contact area, a contact position, and a contact pressure,
• acquiring the behavior information of the vehicle including any one of a vehicle speed, a steering angle, a yaw rate, a lateral acceleration, and a longitudinal acceleration,
• matching the gripping information with the behavior information of the vehicle simultaneously acquired for the identified driver, and
• separately storing a result of the matching for the identified driver, and
• the determining of whether the driver is dozing includes acquiring the current gripping information,
• acquiring the current behavior information of the vehicle,
• generating gripping prediction information by predicting gripping information according to the current behavior information of the vehicle based on the separately stored result of the matching to represent a learned gripping pattern of the identified driver corresponding to the current behavior information, and
• determining whether the driver is dozing by determining an error between the current gripping information, detected by the gripping detection sensor, and the gripping prediction information generated based on the current behavior information of the vehicle including at least one of the vehicle speed, the steering angle, the yaw rate, the lateral acceleration, and the longitudinal acceleration of the vehicle, and by determining that the driver is dozing when the determined error is out of a predetermined range.