Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-01-28
2000-08-01
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
382117, G08B 2300
Patent
active
060972955
ABSTRACT:
An apparatus for determining the alertness of a person, especially a vehicle or machine operator, comprises an image pickup system for recording images of the area of at least one eye of the person, and an image evaluating system which evaluates the images detected by the image pickup system and contains means for detecting the shutting of an eye. The image evaluating system has means for determining pupil size and an evaluating apparatus which determines the alertness according to the eye closing state information obtained by the closed-eye detection means, and according to the pupil size information obtained by the pupil size determining means, with classification into one of at least three stages. The apparatus is used, for example, for determining the alertness of drivers of motor vehicles.
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Griesinger Manfred
Renner Goetz
Ziegler Walter
Daimler-Chrysler AG
Hofsass Jeffery A.
La Anh V.
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