Abstract
Death due to drowning accounts for about 30 % of unintentional injuries of 1 to 4 year infants in Japan. Development of an infant drowning prevention system is strongly required. This paper describes a newly developed system for preventing infant drowning at home. The developed system can measure the wave motion of water in the bathtub using an accelerometer, detect the abnormal wave motion, and give a warning to guardians with a radio communication. This paper discusses the optimum shape and size of the floating body of the preventive system and also presents a system for collecting motion data of bathtub water for long time in an ordinary home in order to conduct science of bathtub water in everyday life.
