Abstract
Aging is rapidly advanced in our country. Therefore, the number of senior citizens increases, too. In the senior citizen's nursing, the movement confirmation is the most important. A lot of s movement confirmation systems for the senior citizens have been proposed so far. However, because a lot of systems are complex and expensive, the introduction was difficult in small scale facilities for senior citizens and an individual house. In this paper, we propose the movement confirmation system, which is safe, cheap, and maintenance free for senior citizens. This system combines an ultrasonic radar (USR) and a power line communication (PLC). USR is composed of the ultrasonic sensor, the ultrasonic transmitter and receiver, and the ultrasonic sensor control unit. USR detects the senior citizens entering a specific range of detection, and transmits the detection signal. PLC receives the detection signal from USR, and informs the signal to the alarm device by using the power line. The alarm device informs the care person and the family who exists in another room of the senior citizen's behavior. The effectiveness of the system is confirmed by field experiment.
