PROBLEM TO BE SOLVED: To improve blood pressure measurement accuracy by performing the suppression of the occurrence of noise, the reduction of the influence of pulsation, and high-accuracy pressurization control when performing the pressurization control by use of a piezoelectric pump in a pressurization process for blood pressure measurement.SOLUTION: In this blood pressure measurement device, the control amplitude and the control frequency of a voltage applied to the piezoelectric pump are determined (steps S111-S114). Control is performed such that the voltage having the determined control amplitude and control frequency is applied to the piezoelectric pump (steps S121, S122), and a blood pressure value is calculated based on a cuff pressure detected by a pressure detection part in the pressurization process of pressurizing the cuff pressure by the piezoelectric pump (step S123). The amplitude of the voltage can be controlled in a prescribed stage, the voltages having the amplitude of a value in at least one stage above the control amplitude and the amplitude of a value in at least one stage below it are applied in prescribed order such that the piezoelectric pump becomes nearly equivalent to when the voltage having the determined control amplitude is applied (steps S111, S112, S121, S122).COPYRIGHT: (C)2013,JPO&INPIT【課題】血圧測定のための加圧過程において圧電ポンプを用いて加圧制御する場合に、騒音の発生を抑制させること、脈動の影響の低減および精度の高い加圧制御により血圧測定精度を向上させること。【解決手段】圧電ポンプに印加する電圧の制御振幅と制御周波数とが決定され(ステップS111~S114)決定された制御振幅および制御周波数の電圧を圧電ポンプに印加するよう制御され(ステップS121,S122)圧電ポンプによってカフ圧を加圧する加圧過程において圧力検出部によって検出されるカフ圧に基づいて血圧値が算出される(ステップS123)。電圧の振幅は所定段階で制御可能であり、決定された制御振幅の電圧が印加された場合と略等価になるように、制御振幅の上の少なくとも1つの段階の値および下の少なくとも1つの段階の値の振幅の電圧が、所定の順番で印加される(ステップS111,S112,S121,S122)。【選択図】図7
