Method for estimating flow velocity

Details Method for estimating flow velocity Method for estimating flow velocity

1997-03-04

1998-12-01

Biegel, Ronald

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 166

Patent

active

058441441

ABSTRACT:
In a Doppler system for determining the average flow velocity of a liquid based on reflection from particles moving with the liquid, and in which system the received signal is subjected to both in-phase and quadrature detection, and is then analyzed into frequency domain in-phase channel amplitude and phase components and quadrature channel amplitude and phase components, an improved method for calculating the average flow velocity, comprising discarding those amplitude components for which the in-phase and quadrature phase components differ from approximately +90 degrees and approximately -90 degrees before using the remaining amplitude components to calculate an average amplitude-weighted frequency that is used in estimating the average flow velocity.

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