Abstract
Recently, a system which can monitor a car driver's biological condition and warn the driver of drowsiness is being proposed. Many researchers have presented evidence that biological signals like brain waves, pulsation waves, and cardiac beat, are different between a normal state and a drinking state of a person beforehand. However, current systems to measure those signals are assumed to be used in a laboratory or with invasive monitoring. A basic theory of the system that prevents drunken driving beforehand is constructed by establishing a new algorithm that distinguishes the person's state and ordinary drinking.
