PROBLEM TO BE SOLVED: To provide a cuff pressure control device capable of detecting an abnormality of a constitution related to cuff pressure control by a method advantageous in miniaturization of the device and in cost and to provide a control method therefor.SOLUTION: When it is not determined S121 that a signal component caused by operation of a pump supplying air into an air bag is included at a strength level higher than a threshold determined beforehand, into a signal showing an inner pressure of a gas passage connected to an inner part of the air bag, it is determined that a cuff pressure control device is abnormal S123.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】装置の小型化ならびにコスト面において有利な方法で、カフの圧力制御に係る構成の異常を検出可能なカフ圧制御装置およびその制御方法を提供する。【解決手段】エアバッグの内部と連結した気体流路の内圧を表す信号に、エアバッグに給気しているポンプの動作に起因する信号成分が予め定められた閾値以上の強度レベルで含まれていると判定されない場合にはS121、カフ圧制御装置が異常であると判定するS123。【選択図】図2
