Abstract
This paper described a signal processing method for the car-mounted vital sign monitoring system to prevent the drowsy driving. Recently, drowsy driving accidents of highway express bus address a serious social problem. We had developed the pneumatic vital signs monitor and launched them onto the care facility and at-home care market. Usual vital signs monitor is not practical for the vehicle use because of the artifact noise. We developed the adaptive filter preventing the interference from the artifact noise, and improved the ECM (Electric Condenser Microphone) sensor to be de-saturated for the artifact noise. By comparison between medical pulse oximeter and the developed monitor system, our proposing vital signs monitor system proved to be useful in a warning against the drowsy driving and the physical exhaustion of the driver and the crew.
