发明名称 |
Drowsiness-estimating device and drowsiness-estimating method |
摘要 |
A drowsiness-estimating device capable of improving the precision of drowsiness estimation by eliminating the effect of individual differences. In the device, a recurrence required time-calculating part (103) calculates the recurrence required time, which is the time needed, after a detection time when an action is detected, for a drowsiness estimation parameter value acquired after the detection time to return to the value of the drowsiness estimation parameter acquired before the detection time. A drowsiness-estimating part (104) estimates the level of drowsiness of the drowsiness-estimation subject on the basis of the calculated recurrence required time. To be specific, the drowsiness-estimating part (104) maintains a drowsiness level-estimating table in which each of multiple time ranges is correlated with a possible drowsiness level, and specifies a possible drowsiness level that corresponds to the time range, among the multiple time ranges, with which the recurrence required time is associated. |
申请公布号 |
US9105172(B2) |
申请公布日期 |
2015.08.11 |
申请号 |
US201214118361 |
申请日期 |
2012.05.25 |
申请人 |
PANASONIC CORPORATION |
发明人 |
Kubotani Hiroyuki;Kitajima Hiroki |
分类号 |
G08B23/00;G08B21/06;A61B5/107;A61B5/11;A61B5/18;G06K9/00 |
主分类号 |
G08B23/00 |
代理机构 |
Pearne & Gordon LLP |
代理人 |
Pearne & Gordon LLP |
主权项 |
1. A drowsiness estimating apparatus for estimating a drowsiness level of a subject of drowsiness estimation from among a plurality of drowsiness level candidates, the drowsiness estimating apparatus comprising:
an acquisition section that acquires a drowsiness estimation parameter at each of a plurality of acquisition timings; a detecting section that detects an action of the subject of drowsiness estimation; a time-calculating section that calculates a recurrence required time which is the time it takes, from a detection timing at which the action is detected, for a value of the drowsiness estimation parameter acquired after the detection timing to return to a value of the drowsiness estimation parameter acquired before the detection timing; and an estimating section that estimates a drowsiness level of the subject of drowsiness estimation based on the calculated recurrence required time. |
地址 |
Osaka JP |