Patent ID: 7360453
Filing Date: 2008-04-22
Classification: G01F

Abstract:
1. A method for measuring at least one parameter of a two-, or multi-phase mixture flowing in a pipeline, by means of an inline measuring device including a measurement transducer of the vibration-type, and a measuring device electronics electrically coupled with said measurement transducer, said mixture consisting of at least one first mixture phase and at least one second mixture phase, said method comprising steps of: conducting the mixture to be measured within at least one measuring tube of said measurement transducer, with the measuring tube being in communication with the pipeline; feeding an exciter arrangement with an excitation signal, said exciter arrangement being adapted to impart motion to said at least one measuring tube and vibrating said at least one measuring tube, said excitation signal including at least a first excitation signal component corresponding to a first one of a plurality of natural eigenmodes of said at least one measuring tube conducting said mixture; sensing vibrations of the measuring tube conducting said mixture and generating at least one oscillation measurement signal representing oscillations of the vibrating measuring tube, said at least one oscillation measurement signal including at least a first measurement signal component corresponding to said first one of said plurality of natural eigenmodes of the at least one measuring tube conducting said mixture, using at least said first measurement signal components and said excitation signal for generating at least one measured value representing said at least one parameter to be measured.