PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of measuring a blood pressure value with a high degree of precision by reducing an impact of a transient response of a filter with a low-cost configuration.SOLUTION: A blood pressure measuring device includes a pressure sensor 11 to detect a pressure in a cuff and output a cuff pressure signal and a pulse wave detecting part 23 to detect a pulse wave from the cuff pressure signal. The pulse wave detecting part 23 includes an analog HPF 232 to extract a high frequency component from the cuff pressure signal, an A/D conversion part 233, a signal holding part 234 to hold a signal after the A/D conversion of the cuff pressure signal detected at a time point when a compression pressure turns from increasing to decreasing, a subtraction part 235 to subtract the signal held by the signal holding part 234 from an output signal of the A/D conversion part 233, and a digital HPF 236 to extract a high frequency component from an output signal of the subtraction part 235.COPYRIGHT: (C)2014,JPO&INPIT【課題】フィルタの過渡応答の影響を安価な構成により軽減して血圧値の測定を高精度に行うことが可能な血圧測定装置を提供する。【解決手段】血圧測定装置は、カフ内の圧力を検出してカフ圧信号を出力する圧力センサ11と、カフ圧信号から脈波を検出する脈波検出部23とを備える。脈波検出部23は、カフ圧信号から高周波成分を抽出するアナログHPF232と、A/D変換部233と、圧迫圧力が増加から減少に転じた時点で検出されたカフ圧信号のA/D変換後の信号を保持する信号保持部234と、A/D変換部233の出力信号から信号保持部234により保持された信号を減算する減算部235と、減算部235の出力信号から高周波成分を抽出するデジタルHPF236とを含む。【選択図】図3
