MEASUREMENT DEVICE

To provide a technique capable of clearly identifying peak frequency of a frequency spectrum and calculating the speed of particles in fluid on the basis of the peak frequency.SOLUTION: A processing device generates a first frequency spectrum by subjecting a signal output from a photoreceiver to Fou...

Full description

Saved in:
Bibliographic Details
Main Authors SAWADA YASUSHI, GOMYO TOMOO, NOGAMI HIROSHI, YOSHINAGA TAKESHI, MORITA NOBUTOMO, NAKAJIMA FUMIYA
Format Patent
LanguageEnglish
Japanese
Published 30.05.2019
Subjects
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
Online AccessGet full text

Cover

More Information
Summary:To provide a technique capable of clearly identifying peak frequency of a frequency spectrum and calculating the speed of particles in fluid on the basis of the peak frequency.SOLUTION: A processing device generates a first frequency spectrum by subjecting a signal output from a photoreceiver to Fourier transformation, generates a second frequency spectrum by converting the generated first frequency spectrum using a formula (1) and calculates the speed of particles in fluid on the basis of a peak frequency of the second frequency spectrum.SELECTED DRAWING: Figure 7 【課題】周波数スペクトルにおけるピーク周波数を明確に特定することができ、そのピーク周波数に基づいて流体中の粒子の速度を演算することができる技術を提供する。【解決手段】処理装置が、受光装置から出力された信号をフーリエ変換して第１の周波数スペクトルを生成し、生成された第１の周波数スペクトルを式（１）によって変換して第２の周波数スペクトルを生成し、第２の周波数スペクトルにおけるピーク周波数に基づいて流体中の粒子の速度を演算する。【選択図】図７
Bibliography:Application Number: JP20170209717