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1. CA2726884 - METHOD AND APPARATUS FOR MAINTAINING FLOW METER TUBE AMPLITUDE OVER A VARIABLE TEMPERATURE RANGE

Amt Kanada
Aktenzeichen/Anmeldenummer 2726884
Anmeldedatum 05.06.2008
Veröffentlichungsnummer 2726884
Veröffentlichungsdatum 10.12.2009
Erteilungsnummer
Erteilungsdatum 03.05.2016
Veröffentlichungsart C
IPC
G01F 1/84
GPhysik
01Messen; Prüfen
FMessen des Volumens, des Durchflussvolumens, des Massendurchflusses oder des Füllstandes; volumetrische Mengenmessung
1Messen des Volumen- oder Massendurchflusses eines Fluids oder eines fließfähigen festen Stoffes, wobei das Fluid in einem ständigen Fluss durch das Instrument fließt
76Vorrichtungen zum Messen des Massenflusses eines Fluids oder eines fließfähigen festen Stoffes
78Direkte Massen-Strömungsmesser
80nach dem Prinzip der Messung von Druck, Kraft, Moment oder Frequenz einer Strömung, der eine Rotationsbewegung aufgeprägt wurde
84Coriolis- oder gyroskopische Massen-Strömungsmesser
CPC
G01F 1/8436
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
8436signal processing
G01F 1/8477
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
845arrangements of measuring means, e.g., of measuring conduits
8468vibrating measuring conduits
8472having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
8477with multiple measuring conduits
G01F 15/022
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
15Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
02Compensating or correcting for variations in pressure, density or temperature
022using electrical means
Anmelder MICRO MOTION, INC.
Titel
(EN) METHOD AND APPARATUS FOR MAINTAINING FLOW METER TUBE AMPLITUDE OVER A VARIABLE TEMPERATURE RANGE
(FR) PROCEDE ET APPAREIL POUR MAINTENIR UNE AMPLITUDE DE TUBE DE DEBITMETRE SUR UNE PLAGE DE TEMPERATURE VARIABLE
Zusammenfassung
(EN)



A method for operating a flow meter is provided. The flow
meter includes a driver and pickoff sensors coupled to a flow tube. The
driver is adapted to vibrate the flow tube in response to a drive signal. The
method comprises setting a target pickoff voltage and measuring a flow
meter temperature. The method further comprises generating a temperature
compensated target pickoff voltage and controlling the drive signal to
maintain a temperature compensated flow tube amplitude.