Awakening level estimation apparatus for a vehicle and method thereof
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United States of America Patent
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Apr 25, 2006
Grant Date -
Apr 29, 2004
app pub date -
Oct 22, 2003
filing date -
Oct 23, 2002
priority date (Note) -
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Abstract
An awakening level estimation apparatus for vehicle has: a signal processing part; a frequency component amount calculation part for calculating an average value of the frequency component powers and calculating a maximum value of the frequency component powers; a correction factor calculation part for calculating a high frequency percentile value and calculating a low frequency percentile value and calculating a correction factor; an evaluation value calculation part for calculating an evaluation value; and a decision part for deciding an awakening level of a driver.
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