Patent ID: 7337075
Filing Date: 2008-02-26
Classification: G01F,G01N

Abstract:
1. An apparatus for measuring at least one parameter of a mixture in a pipe, said apparatus comprising: a spatial array of at least two pressure sensors, disposed at different axial locations along the pipe, and each measuring an unsteady pressure within the pipe at a corresponding axial location, each of said sensors providing a pressure signal indicative of the unsteady pressure within the pipe at said axial location of a corresponding one of said sensors; and a signal processor, responsive to said pressure signals, that is adapted to determine the speed of sound propagating through the mixture having liquid droplets suspended in a gas as a function of frequency to characterize dispersion properties of the mixture and compare the dispersion properties of the mixture to a dispersion model of the mixture to provide a signal indicative of the at least one parameter of the mixture in the pipe, and adapted to determine the velocity of the mixture by determining the velocity of a pressure field convecting with the mixture across the array of sensors.