Abstract
In order to reduce the increasing rate of accidents concerning elderly people at the age of 75 years or older, this paper discusses a tendency of accidents, its main factors, and the triggers of the factors by analyzing statistical data of the accidents. This study proposes a new method to reduce the risks of the accidents by introducing a mobile robot to detect the associated changing factors. We set a hypothesis of a law for the occurrence of accidents. The hypothesis is "An accidents occurs under changing factors.". As an example, the paper desrcibes a consideration of a mobile robot for an assist in preventing the elderly from slipping to fall. It is realized by detecting liquid on the floor as one of the changing factors, and assess the feasibility toward verification of the hypothesis.
