Title:
流体測定器および流体測定方法
Document Type and Number:
Japanese Patent JP5643156
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately and inexpensively measure a moving speed of particles within a short time.SOLUTION: A fluid measuring instrument comprises a minute flow passage 7 covered with a transparent plate 8 that scatters light, a laser light source 1 which irradiates a fluid in the minute flow passage 7 with laser light through the transparent plate 8, a photodetector 2 which receives light scattered by the transparent plate 8 and light scattered by particles contained in a fluid and converts the received light into an electric signal, frequency measuring means which measures the frequency of a beat signal included in the electric signal obtained by the photodetector 2, and speed calculation means which calculates a moving speed of particles from the frequency of the beat signal measured by the frequency measuring means.
Inventors:
清倉 孝規
堀内 勉
堀内 勉
Application Number:
JP2011130016A
Publication Date:
December 17, 2014
Filing Date:
June 10, 2011
Export Citation:
Assignee:
日本電信電話株式会社
International Classes:
G01P5/00; G01F1/66
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Yuzo Koike
Shigeki Yamakawa
Yuzo Koike