Measuring and testing – Volume or rate of flow – With indirect temperature or density compensation
Reexamination Certificate
2005-07-12
2005-07-12
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Volume or rate of flow
With indirect temperature or density compensation
Reexamination Certificate
active
06915703
ABSTRACT:
A method for determining a flow property of a fluid flowing through a conduit provided with a capacitance meter having an upstream and a downstream annular capacitance sensor, wherein each annular capacitance sensor having at least three sensor electrodes, which sensor electrodes are arranged around the circumference of the conduit, the method having selecting, for each annular capacitance sensor a set of measurement capacitors, wherein a measurement capacitor is formed by two measurement electrodes, and wherein a measurement electrode consists either of a single sensor electrode or of at least two interconnected sensor electrodes; measuring at several moments during a time interval a capacitance of each measurement capacitor of each annular capacitance sensor; determining cross correlations between capacitances measured during the time interval at the upstream annular capacitance sensor and capacitances measured during the time interval at the downstream annular capacitance sensor; and determining the flow property from the cross correlations.
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Haase Mark Christopher
Van Der Spek Alexander Michael
Lefkowitz Edward
Shell Oil Company
Thompson Jewel V.
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