Electricity: measuring and testing – Determining nonelectric properties by measuring electric...
Patent
1996-04-11
1998-03-17
Brown, Glenn W.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
324439, 324693, 324704, 73 191, G01N 2706
Patent
active
057291233
ABSTRACT:
A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining therebetween a sample zone within the system. A generating unit generates time varying electrical signals which are inserted into one of the two parallel conductive paths. A time domain reflectometer receives the time varying electrical signals returned by the second of the two parallel conductive paths and, responsive thereto, outputs a curve of impedance versus distance. An analysis unit then calculates the area under the curve, subtracts the calculated area from an area produced when the sample zone consists entirely of material of a first fluid phase, and divides this calculated difference by the difference between an area produced when the sample zone consists entirely of material of the first fluid phase and an area produced when the sample zone consists entirely of material of a second fluid phase. The result is the volume fraction.
REFERENCES:
patent: 4786857 (1988-11-01), Mohr et al.
patent: 5043706 (1991-08-01), Oliver
patent: 5270663 (1993-12-01), Sano et al.
patent: 5412326 (1995-05-01), Marrelli et al.
patent: 5554936 (1996-09-01), Mohr
Jandrasits Walter G.
Kikta Thomas J.
Brown Glenn W.
Caress Virginia B.
Gottlieb Paul A.
Moser William R.
The United States of America as represented by the United States
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