Title:
【発明の名称】質量・体積流量計
Document Type and Number:
Japanese Patent JPH03501295
Kind Code:
A
Abstract:
The flowmeter comprising a first flow passage with a fixed cross section geometry and a second flow passage with a variable cross section geometry measures the volume and mass rates of fluid flow through the flowmeter as well as the density of the fluid. The variable cross section geometry of the second flow passage varies as a function of the dynamic pressure of the fluid flow and the difference in the volume or mass rate of the fluid flow between the two flow passages varies as a function of the variable cross section geometry of the second flow passasge. The volume or mass rates of the fluid flow through the two flow passages are measured and the dynamic pressure of the fluid flow is determined therefrom, whereupon the volume and mass flow rates of the fluid flow and the density of the fluid are determined from the data on the volume flow and the dynamic pressure, or from the data on the mass flow and the dynamic pressure.
Inventors:
Liu, Yok San
Application Number:
JP50736589A
Publication Date:
March 22, 1991
Filing Date:
June 15, 1989
Export Citation:
Assignee:
Liu, Yok San
International Classes:
G01F1/10; G01F1/28; G01F1/32; G01F1/36; G01F1/58; G01F1/64; G01F1/684; G01F1/86; G01F1/88; G01F5/00; G01N9/04; (IPC1-7): G01F1/32; G01F1/88
Attorney, Agent or Firm:
Kyozo Yuasa (4 outside)