PROBLEM TO BE SOLVED: To provide a fluid evaluation device and a method that are capable of appropriately calculating an average value of fluids flow rates.SOLUTION: A fluid evaluation device 1 comprises: irradiation means for irradiating with laser light LB, an object to be measured 100 in which a fluid flows first detection means for detecting a flow rate of the fluid on the basis of a frequency variation that is caused by a Doppler shift of the laser light and is obtained by detecting the laser light radiated to the object to be measured second detection means for detecting a pulsation period of the fluid on the basis of a variation in the flow rate and calculation means for calculating an average value of flow rates for each period in synchronization with the pulsation period.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】流体の流量の平均値を好適に算出することが可能な流体評価装置及び方法を提供する。【解決手段】流体評価装置1は、内部に流体が流れている被測定対象100に対してレーザ光LBを照射する照射手段と、被測定対象に照射されたレーザ光を検出することで得られる、レーザ光のドップラシフトに起因する周波数変化に基づいて、流体の流量を検出する第1検出手段と、流量の変化に基づいて、流量の脈動周期を検出する第2検出手段と、脈動周期に同期した期間毎の流量の平均値を算出する算出手段とを備える。【選択図】図1
