Vibrating tube densimeter

G - Physics – 01 – N

Patent

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Details

G01N 9/00 (2006.01) G01F 1/84 (2006.01)

Patent

CA 2257817

A Coriolis effect densimeter which produces density output data of improved accuracy by embodying the principal that the natural frequency of a vibrating tube filled with material decreases with an increase in the material mass flow rate. High accuracy output data is achieved by measuring the density and the mass flow rate of material through the vibrating tube, correcting the measured density to compensate for the effect of the mass flow rate, and correcting the mass flow rate correction of the density measurement for changes due to temperature.

Cette invention se rapporte à un densimètre à effet de Coriolis, qui produit des données de sortie de densité d'une précision accrue, en appliquant le principe selon lequel la fréquence naturelle d'un tube vibrant rempli d'un matériau décroît lors d'une augmentation du débit massique de ce matériau. On obtient des données de sortie d'une précision élevée en mesurant la densité et le débit massique du matériau traversant le tube vibrant, en corrigeant la densité mesurée pour compenser l'effet du débit massique et en corrigeant le débit massique pour obtenir une correction de la mesure de densité tenant compte des changements dus à la température.

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