Patent ID: 6732575
Filing Date: 2004-05-11
Classification: G01H,G01N

Abstract:
An industrial process control system for controlling at least one process parameter of an industrial process, said system comprising:an apparatus for determining at least one mixture parameter of a mixture flowing within a pipe of the industrial process, said apparatus comprising: a spatial array of at least two pressure sensors, disposed at different axial locations along said pipe, each of the at least two pressure sensors measuring an acoustic pressure within said pipe at a corresponding axial location, each of said pressure sensors providing an acoustic pressure signal at each of said corresponding axial locations; and a signal processor, responsive to said pressure signals, which provides an output signal indicative of the at least one mixture parameter related to a speed of sound of the mixture in the pipe; and a control device receiving said output signal and capable of controlling the at least one process parameter to a predetermined level.