Abstract
We have developed a portable digital biosignal memory unit that uses microprocessor technology, and have used this device to monitor subject's physical activities and behavior in daily life. In this paper we discuss the technologies and results regarding monitoring physical activities and behavior in daily life : 1) a motion counter with a mercury switch, 2) measurement of foot pressure distribution by micro pressure sensors, 3) monitoring of posture change and physical activity in daily life by an accelerometer, 4) behavior map monitoring by a GPS sensor, 5) estimation of mental stress by simultaneous monitoring of physical activities and heart rate, and 6) joint motion monitoring in daily life by two accelerometers set on both sides near the joint.
