PROBLEM TO BE SOLVED: To correctly and instantly detect submergence of a bather by monitoring a positional relation between the water level of a bathtub and the bather.SOLUTION: A bathroom monitoring device has: a transmitter part 2 for transmitting ultrasonic waves which continue only for a prescribed period of time to a bathtub a receiver part 3 for receiving reflection waves of the ultrasonic waves a distance measurement means 633 for calculating a distance between the water surface of the bathtub and the body upper end part of the bather on the basis of the reflection wave received by the receiver part 3 and a state determination means 634 for determining the submergence state of the bather in the bathtub on the basis of the distance measured by the distance measurement means 633.COPYRIGHT: (C)2012,JPO&INPIT【課題】浴槽内の水位と入浴者との位置関係を監視して、入浴者の沈水を正確かつ即座に検知する。【解決手段】予め定めた時間だけ継続する超音波を浴槽に向けて発信するトランスミッタ部2と、その超音波の反射波を受信するレシーバ部3と、レシーバ部3により受信した反射波に基づいて、浴槽の水面と入浴者の身体上端部との間の距離を算出する距離測定手段633と、距離測定手段633が測定した距離に基づいて、浴槽内の入浴者の沈水状態を判断する状態判断手段634とを有する。【選択図】 図1
