APPARATUS FOR IDENTIFYING AWAKE STATE, DRIVING SUPPORT DEVICE, AND PROGRAM FOR IDENTIFYING AWAKE STATE

摘要

PROBLEM TO BE SOLVED: To identify an awake state of a driver with high accuracy, even with a small number of data. SOLUTION: A lane detection unit 52 detects a lane specifying a lane of travel on which one's own vehicle travels, based on an image captured by an image capturing apparatus 20. AΔE calculation unit 54 calculates a value (ΔE) obtained when an integrated value of horizontal distances between a lane in the direction of a Y'-axis perpendicular to an X'-axis (direction of travel of the vehicle) and the vehicle about a period of time from the current time to a predetermined time is divided by the predetermined time. Based on a sensor value of a steering angle sensor, an avoidance behavior decision unit 56 determines whether there is avoidance behavior, i.e., a steering operation in a direction opposite to the direction of the vehicle veering from the lane, and setsΔE when there is the avoidance behavior asΔE'. An awake state identifying unit 58 identifies the awake state of the driver depending on whether the ratioΔαof the time during whichΔE exceedsΔEst, the ratioΔβof the number of times thatΔE' exceedsΔEst, and the maximum valueΔγof the timeΔRT from whenΔE exceedsΔEstuntil the avoidance behavior is effected have exceeded their respective thresholds. COPYRIGHT: (C)2011,JPO&INPIT