A physiological status and environmental conditions monitoring system for aged-people living-alone

A physiological status and environmental condition monitoring system has been proposed to guard the aged-people who always live alone in this paper. The system includes sensor modules that can acquire the status of people living alone or empty nesters; the wireless transmission module passes the processed data from sensors which are space-distribution to the central unit. When the aged is under unusual condition, GSM alarm module timely acts on the basis of various alarm categories, and sends the alarm message which contains positioning information to the relatives of the aged or the health care. An interface which consists of LCD screen and keypad has been designed and programmed for the aged to use conveniently. In addition, a tumble decision algorithm based on acceleration sensor has also been present by experiments, which can improve the identification successity of the aged peoples' status, especially who is in danger.