PROBLEM TO BE SOLVED: To provide a fluid pulsation pressure measuring device capable of being always mounted and having a simple calibration without using a separate and special measuring device when the pressure of the liquid which flows in a conduit.SOLUTION: The fluid pulsation pressure measuring device includes at least two conduit diameter sensors 1, 2 mutually and separately placed. Reflection arrival time is measured by sending and receiving wave motion to the conduit arranged inside a measurement object part using signal operation parts 11, 21 by one or the other sensor, a water head difference is derived by a height position decision parts 24, 28 based on the distance between the respective sensors, and an amount of variation of the conduit and a diametrical difference of the conduit are derived by a pulse pressure signal operation part 31 so that pressure difference between the maximum value and the minimum value by conducting calibration using the water head difference is obtained.COPYRIGHT: (C)2012,JPO&INPIT【課題】導管内を流動する液体の圧力を常時計測する場合に、別途特別な計測機器を用いずに簡易に校正ができる常時装着可能な流体脈動圧計測装置を提供する。【解決手段】互いに離間して配置された少なくとも2つの導管径センサー1,2を備えた流体脈動圧計測装置は、一方及び他方のセンサーによって、計測対象部に内在する導管に波動を送受信することで反射到達時間を信号演算部11,21で計測し、各センサー間の距離に基づいて高さ位置決定部24,28により水頭差を導き出し、脈圧信号演算部31で導管の変化量と、導管の径差とを導き出して、水頭差を用いて校正される導管内の流体圧の最大値と最小値との圧力差を求める。【選択図】図3
