System and method for detecting driver drowsiness including dete

Details System and method for detecting driver drowsiness including dete System and method for detecting driver drowsiness including dete

1984-02-15

1986-08-05

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

180272, 340575, G08B 2300

Patent

active

046046119

ABSTRACT:
A system and method for detecting driver drowsiness in an automotive vehicle employs means for detecting changes in steering direction of a steering wheel on the basis of steering pulses, each steering pulse being produced whenever the steering wheel is rotated through a predetermined angle, and determines that the vehicle driver is drowsy when the number of steering pulses within a fixed interval of time exceeds a first reference value and the number of steering reversals within the fixed interval of time is below a second preset reference value.

REFERENCES:
patent: 3222640 (1965-12-01), Wurst
patent: 3654599 (1972-04-01), Sepper
patent: 3794969 (1974-02-01), Klopfenstein et al.
patent: 4005398 (1977-01-01), Inoue et al.
patent: 4058796 (1977-11-01), Oishi et al.
patent: 4104621 (1978-08-01), Yanagishima et al.
patent: 4224609 (1980-09-01), Yanagishima et al.
patent: 4450438 (1984-05-01), Seko et al.

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