Abstract
We have developed a sleepiness notice system during driving by measuring RR interval in order to prevent traffic accidents when drivers get to feel sleepy. A wireless small size electrocardiograph is used and it can measure RR interval. We have found that sleepiness is related to the continuous increase of RR interval, and as long as RR interval increases over the specific times and over the specific range continuously, drivers get to feel sleepy. At this time, this system notifies the driver who would meet to a risk with an alarm. This algorithm is incorporated into the sleepiness notice system. We examined the detective accuracy of sleepiness with 60 drivers in the field test, and could good results that sleepiness was detected with a high probability.
