Patent ID: 6786077
Filing Date: 2004-09-07
Classification: G01N

Abstract:
A method for measuring the density of a fluid in a pipe, comprising the steps of:determining a first, a second, and a third reference reading of a pipe using a transmitter transducer, a receiver transducer, and a primary receiver transducer coupled to a pipe, wherein the first reference reading relates to the pipe void of any liquid, the second reference reading relates to the pipe having a reference liquid of known sonic impedance within, and the third reference reading relates to the pipe having an unknown liquid of unknown density and unknown sonic impedance within; measuring a liquid sonic propagation velocity of the unknown liquid; determining an impedance of the unknown liquid based upon the known impedance of the reference liquid and the first, second, and third reference readings; and determining the density of the unknown liquid based upon the determined unknown impedance and the measured liquid sonic propagation velocity of the unknown liquid.