Densitometer with pulsing pressure

Details Densitometer with pulsing pressure Densitometer with pulsing pressure

2007-08-21

2007-08-21

Williams, Hezron (Department: 2856)

Measuring and testing

Specific gravity or density of liquid or solid

C073S019030, C073S061470, C073S061780, C073S061790

Reexamination Certificate

active

11458869

ABSTRACT:
Techniques for measuring a density of a liquid within a fluid that includes both a liquid and a gas are described. A pressure of the fluid oscillates according to a time-varying function, which causes a density of the fluid also to oscillate according to the same time-varying function. A resulting pressure signal and density signal are analyzed to extract at least a first and second pressure value and at least a first and second density value, where the first pressure and density values occur at a first time, and the second pressure and density values occur at a second time. Then, the liquid density is calculated from the first and second pressure and density values. As a result, the liquid density may be calculated quickly and easily, with a minimum of effort on the part of an operator, and without requiring disruption of other measurement processes associated with the flowtube.

REFERENCES:
patent: 4365505 (1982-12-01), Holzl
patent: 5224372 (1993-07-01), Kolpak
patent: 5295083 (1994-03-01), Yano et al.
patent: 6496781 (2002-12-01), Chen et al.
patent: 6766680 (2004-07-01), Chen et al.
patent: 2004/0206157 (2004-10-01), Chen et al.
International Search Report mailed Feb. 24, 2006 for PCT/US04/41432, filed Dec. 13, 2004.
Written Opinion mailed Feb. 24, 2006 for PCT/US04/41432, filed Dec. 13, 2004.

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