Driver's arousal level estimating apparatus for vehicle and method of estimating arousal level

Abstract

A lateral displacement of a vehicle is detected consecutively and the displacement is subjected to a frequency conversion to obtain a frequency component power. Then, a first integral of the frequency component power is obtained with respect to frequency of a low frequency domain and a second integral of the power is obtained with respect to frequency of a high frequency domain. An evaluation value is calculated from thus obtained first and second integrals and a driver's arousal level is judged based on the evaluation value.

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