Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1984-02-15
1986-04-08
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
180272, G08B 2300
Patent
active
045816077
ABSTRACT:
A system and method for detecting driver drowsiness on the basis of steering pulses, each steering pulse being produced whenever a steering wheel is rotated through a predetermined angle and indicating the direction of rotation of the steering wheel, comprising means for detecting the roughness of the road surface on which the vehicle is travelling and interrupting the detection of driver drowsiness for a fixed interval of time when the road surface roughness exceeds an acceptable level, i.e. a level conductive to accurate drowsiness detection.
REFERENCES:
patent: 4463347 (1984-07-01), Seko et al.
patent: 4496938 (1985-01-01), Seko et al.
patent: 4518954 (1985-05-01), Seko et al.
Copy of Specification corresponding to U.S. patent application Ser. No. 476,519, pending in U.S. Patent Office.
Iizuka Haruhiko
Obara Hideo
Seko Yasutoshi
Yanagishima Takayuki
Hofsass Jeffery A.
Nissan Motor Company Ltd.
Rowland James L.
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