Abstract
Keywords: Automobile Safety, Drive dozing prevention, Sensor, Chaos analysis, Man-machine interaction
In this study, we have developed a system of sensor and a software program that could detect driver's dozing symptom before he actually starts sleeping. Car seat equipped with an air pressure sensor and a magnetic sensor monitors driver's vein pulse wave. Shape transformation of the measured vein pulse wave is evaluated by two parameters, Lyapunov exponent which is based on Chaos analysis and power which could be obtained by FFT. Anti phase motion of time derivatives of these two parameters indicates driver's dozing symptom.