Proposal of Leaving the Bed Motion Detection Method Corresponded at Night using Obrid-Sensor

Abstract

Recently, due to the aging of population (1) , the increasing of dementia patients has become social problem. The dementia patients are feared to go wander, and some of them may be gone missing after going out and have a risk to encounter accident (2) . However, watching over them all the time is difficult. Especially watching over at midnight or after sleeping is mental burden for helpers. In order to solve the problem, watching by camera is given, but it is difficult to use cameras in daily life from the viewpoint of privacy violation.As the solution for this problem, we have developed one-dimensional brightness distribution sensor (Obrid-Sensor) that can detect the subject's position, motion and condition without violating their privacy. In this paper, the method of leaving the bed detection that detect the leaving the bed motion day and night by installing the sensor in the edge of in the bed and irradiating infrared light is proposed.