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1. WO2006122881 - CORIOLIS MASS FLOW/DENSITY MEASURING DEVICES AND METHOD FOR COMPENSATING MEASUREMENT ERRORS IN SUCH DEVICES

Publication Number WO/2006/122881
Publication Date 23.11.2006
International Application No. PCT/EP2006/062072
International Filing Date 04.05.2006
IPC
G01F 1/84 2006.1
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Coriolis or gyroscopic mass flowmeters
G01F 1/74 2006.1
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
G01F 15/02 2006.1
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
15Details of, or accessories for, apparatus of groups G01F1/-G01F13/104
02Compensating or correcting for variations in pressure, density, or temperature
CPC
G01F 1/74
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
G01F 1/8409
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
G01F 1/8413
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8413means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
G01F 1/8418
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8413means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
8418motion or vibration balancing means
G01F 1/8422
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8422exciters
G01F 1/8427
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8427detectors
Applicants
  • ENDRESS+HAUSER FLOWTEC AG [CH]/[CH] (AllExceptUS)
  • DRAHM, Wolfgang [DE]/[DE] (UsOnly)
  • RIEDER, Alfred [DE]/[DE] (UsOnly)
  • ZHU, Hao [CN]/[DE] (UsOnly)
Inventors
  • DRAHM, Wolfgang
  • RIEDER, Alfred
  • ZHU, Hao
Agents
  • ANDRES, Angelika
Priority Data
05010753.118.05.2005EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) CORIOLIS MASS FLOW/DENSITY MEASURING DEVICES AND METHOD FOR COMPENSATING MEASUREMENT ERRORS IN SUCH DEVICES
(FR) DISPOSITIFS DE MESURE EN LIGNE ET PROCEDE POUR NEUTRALISER DES ERREURS DE MESURE DANS DES DISPOSITIFS DE MESURE EN LIGNE
Abstract
(EN) The inline measuring device comprises a vibratory-type transducer and a measuring device electronics electrically coupled with the vibratory-type transducer. The vibratory-type transducer includes at least one measuring tube being inserted into the course of a pipeline and serving for conducting a mixture to be measured. An exciter arrangement acting on the measuring tube for causing the at least one measuring tube to vibrate and a sensor arrangement sensing vibrations of the at least one measuring tube and delivering at least one oscillation measurement signal representing oscillations of the measuring tube. The measuring device electronics delivers an excitation current driving the exciter arrangement. Further, the inline measuring device electronics is adapted to produce a measured value representing the physical, measured quantity of the mixture to be measured. Therefor, the measuring device electronics estimates from the excitation current and from said at least one oscillation measurement signal a Coriolis coupling coefficient. This Coriolis coupling coefficient corresponds with an instantaneous coupling between a first natural eigenmode of the measuring tube currently driven by the exciter arrangement and a second natural eigenmode of said measurement tube. In this second eigenmode the measurement tube has an eigenform corresponding with a mode of vibration caused by Coriolis forces induced in the flowing mixture. Due to a variation of a concentration of at least one of a component of the mixture the Coriolis coupling coefficient varies in time.
(FR) L'invention concerne un dispositif de mesure en ligne comprenant un transducteur de type vibrant, auquel est électriquement couplé un système électronique du dispositif de mesure. Le transducteur de type vibrant comporte au moins un tube de mesure inséré dans la ligne d'un conduit et servant au transport d'un mélange à mesurer. Un ensemble d'excitation agit sur le tube de mesure pour le faire vibrer et un ensemble de détection capte les vibrations du tube de mesure et envoie au moins un signal de mesure de vibration représentant les oscillations du tube de mesure. Le système électronique du dispositif de mesure fournit un courant d'excitation entraînant l'ensemble d'excitation. En outre, le système électronique du dispositif de mesure en ligne est conçu pour produire une valeur mesurée représentant la quantité mesurée physique du mélange à mesurer. Ainsi, le système électronique du dispositif de mesure évalue, à partir du courant d'excitation et du signal de mesure d'oscillation, un coefficient de couplage de Coriolis. Ce coefficient de couplage de Coriolis correspond à un couplage instantané entre un premier mode propre naturel du tube de mesure momentanément entraîné par l'ensemble d'excitation et un deuxième mode propre naturel du tube de mesure. Selon ce deuxième mode propre, le tube de mesure a une forme propre correspondant à un mode de vibration causé par les forces de Coriolis induites dans le mélange en écoulement. Une variation de la concentration d'au moins un composant du mélange fait varier le coefficient de couplage de Coriolis dans le temps.
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