Apparatus for measuring velocity and flow rate of a fluid...

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy

Reexamination Certificate

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C073S024010

Reexamination Certificate

active

10862237

ABSTRACT:
An apparatus10and method is provided that includes a spatial array of unsteady pressure sensors15–18placed at predetermined axial locations x1–xNdisposed axially along a pipe14for measuring the velocity and volumetric flow rate of a single phase or multi-phase fluid12having a non-negligible axial Mach number flowing in the pipe14. The pressure sensors15–18provide acoustic pressure signals P1(t)–PN(t) to a signal processing unit30which determines the speed of sound propagating with and against the flow of the fluid12in the pipe14using acoustic spatial array signal processing techniques. The apparatus, responsive to the measured speed of sound propagating with and against the flow of the fluid, determines the velocity and the flow rate of the fluid propagating through the pipe.

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