PROBLEM TO BE SOLVED: To accurately analyze fluid by reducing influence from shot noise of a detection signal.SOLUTION: A fluid analyzing device includes: a signal processing part for executing filter processing with respect to a detection signal indicating intensity of light passing through fluid so that the higher frequency components are within a predetermined processing band, the more the frequency components are suppressed and an arithmetic processing part for generating information on speed of the fluid from an intensity spectrum of the post-filter processed signal.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2019,JPO&INPIT【課題】検出信号におけるショットノイズの影響を低減して流体を高精度に解析する。【解決手段】流体を通過した光の強度を表す検出信号に対し、所定の処理帯域内で周波数が高い成分ほど抑制されるようにフィルター処理を実行する信号処理部と、前記フィルター処理後の信号の強度スペクトルから、前記流体の速度に関する情報を生成する演算処理部とを具備する流体解析装置。【選択図】図3
