PROBLEM TO BE SOLVED: To enhance the accuracy of estimation of the fatigue level of a vehicle driver.SOLUTION: Biological information of the vehicle driver is acquired, and the fatigue level of the driver is estimated based on a stabilization time that is the time for the biological information which has changed within a braking period from deceleration start of the vehicle to stoppage thereof to be stabilized after the braking period. According to the estimation of fatigue level based on the stabilization time, an estimate value is never affected by road environments, traffic environments, changes in operation load caused thereby, and the like, and the fatigue level can be estimated with high accuracy.COPYRIGHT: (C)2013,JPO&INPIT【課題】車両の運転者疲労度推定の精度を高める。【解決手段】車両の運転者の生体情報を取得し、車両の減速開始から停車までの制動期間内に変化した生体情報が、制動期間後に安定化するまでの時間である安定化時間に基づいて、運転者疲労度を推定する。安定化時間に基づいて疲労度を推定すれば、道路環境、交通環境、それらによる運転負荷の変化などによって推定値が影響されることはなく、疲労度を高い精度で推定することができる。【選択図】図2
