Title:
眠気推定装置及び眠気推定方法
Document Type and Number:
Japanese Patent JP5666383
Kind Code:
B2
Abstract:
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.
Inventors:
久保谷 寛行
北島 洋樹
北島 洋樹
Application Number:
JP2011117834A
Publication Date:
February 12, 2015
Filing Date:
May 26, 2011
Export Citation:
Assignee:
パナソニック株式会社
International Classes:
A61B5/18; G08B21/06; G08G1/16
Attorney, Agent or Firm:
Koichi Washida