Dozing warning system for a vehicle
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United States of America Patent
Stats
-
Jan 14, 1986
Grant Date -
N/A
app pub date -
Sep 22, 1982
filing date -
Oct 6, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A warning device for a vehicle includes a steering angle detector (10) producing steering angle pulses (S.sub.2, S.sub.3) indicative of the steering angle and the steering direction whenever the variation of the steering angular position exceeds a predetermined angle. A dozing detecting circuit (16) distinguishes that the driver is in a normal condition when excessively frequent steering operations in one direction are performed or when the interval of the steering angle pulse is longer than a predetermined value, and produces a warning signal when steering operations, each of which does not exceed the predetermined angle in one direction, are repeated at a rate greater than a predetermined frequency. A warning device (26) produces a visible or audible warning in response to the warning signal, whereby the warning device can accurately detect dozing of the driver and produce a warning to make the driver wake up.
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Family
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Cited Art Landscape
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