Sudden death in bathrooms is an important social problem in Japan. This paper proposes a bathroom watching system with the aim of detecting bathing people who are drowning. This system employs a fiber grating vision system and a color camera to detect breathing and the position of a bather, as well as to perform a self-diagnosis of the system operational state. The effectiveness of these functions was verified through experiments.
Recently, domestic accidents have been increasing in Japan. These kinds of accidents occur in private areas such as bedrooms, toilets and bathrooms, and tend to be found too late. Accidents, particularly those occurring in the bathroom, can often result in death. Many systems which have been proposed or which are in use are designed to detect body motion in the bathroom, and determine that a bather has suddenly taken ill when movement ceases. However, the relaxed posture of a person bathing is actually very similar to that of a person who has passed out. It is therefore very difficult to differentiate between the two postures. We have developed a watching system for bathrooms. The new feature of this system lies in its ability to detect a person’s breathing by using an FG vision sensor. From the experiment, it was found that the false alarm rate is expected to reach less than 0.0001% when waiting time is set to 36.8 seconds.