Title:
【発明の名称】音響スペクトル分析を用いるポンプ制御器
Document Type and Number:
Japanese Patent JP3155758
Kind Code:
B2
Abstract:
A system for controlling the flow of fluid through a line (3). The system may include first and second valves (A, B; and 6, 7) in the line (3) between is located a chamber (52, 82), part of which may be filled with fluid having a variable volume (52), and another part is filled with a measurement gas (V1), such as air. The chamber may be isolated from the pressure effects in the rest of the line by closing both valves. The valves may also permit fluid to flow into or out of the chamber. The second portion of the chamber has a common boundary with the first part in such a way that tha combined volume of the first and second parts is constant. A loudspeaker (22, 33, 571) creates sound waves in the gas in the second part of the chamber, in order to mesure the volume of the fluid in the first part, and for directing the operation of the valves and creating subsonic pressure variations to produce the desired flow. The volume measurement is achieved by acoustic volume measurement techniques.
Inventors:
Kamen, Dean El
Seal, Joseph Bee
Briggs, Joseph
Arnold, Finn
Seal, Joseph Bee
Briggs, Joseph
Arnold, Finn
Application Number:
JP50108592A
Publication Date:
April 16, 2001
Filing Date:
November 15, 1991
Export Citation:
Assignee:
Deca Products Limited Partnership
International Classes:
F04B43/04; G01F1/66; G01F3/36; G01F11/08; G01F17/00; (IPC1-7): G01F11/08; G01F17/00
Domestic Patent References:
| JP6441822A |
Other References:
【文献】米国特許3596510(US,A)
【文献】国際公開90/13795(WO,A1)
【文献】国際公開90/13795(WO,A1)
Attorney, Agent or Firm:
Yuzo Yamazaki (1 person outside)
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