Wakefulness estimating apparatus and method
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United States of America Patent
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Aug 1, 2006
Grant Date -
Mar 24, 2005
app pub date -
Aug 24, 2004
filing date -
Aug 26, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
When a steering angle dakaku is equal to or smaller than .+-.15.degree. (S22), the steering angle dakaku is integrated to calculate an integrated value dakaku_sum (S24). When the integrated value dakaku_sum is within a set range (S25, S26), a road-shape-based wakefulness correction coefficient R_hosei is set at 0.5 (S28). Any erroneous determination of wakefulness attributable to a road shape is prevented by correcting wakefulness H for evaluating wakefulness by decreasing it using the road-shape-based wakefulness correction coefficient R_hosei.
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