Patent ID: 7284449
Filing Date: 2007-10-23
Classification: G01F,G01N

Abstract:
1. An inline measuring device, especially a Coriolis mass-flow/density measuring device and/or a viscosity measuring device, for the measurement of at least one physical, measured quantity x, especially a mass flow rate, m, a density, ρ, and/or a viscosity, η, of a medium, especially a two, or more, phase medium, guided in a pipeline, which inline measuring device comprises: a vibratory-type measurement pickup; and measuring device electronics electrically coupled with said vibratory-type measurement pickup, wherein said measurement pickup includes: at least one measuring tube, especially an essentially straight measuring tube, inserted into the course of the pipeline, serving to guide the medium to be measured, and communicating with the connected pipeline; an exciter arrangement acting on said at least one measuring tube for causing said at least one measuring tube to vibrate, which, during operation, causes the measuring tube to vibrate at least at times and/or at least partially with lateral oscillations, especially bending oscillations, and which, during operation, causes the measuring tube to vibrate at least at times and/or at least partially with torsional oscillations, especially with torsional oscillations alternating with the lateral oscillations or at times superimposed thereon, about an imaginary measuring tube longitudinal axis essentially aligned with said at least one measuring tube, especially such an axis in the form of a principal axis of inertia of the measuring tube; and a sensor arrangement for registering vibrations of said at least one measuring tube and for delivering at least one oscillation measurement signal (s said measuring device electronics delivers, at least at times, an exciter current (i said measuring device electronics further determines a first intermediate value (X said measuring device electronics by means of at least one oscillation measurement signal (s