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US 12,631,537 B2Granted
Method and measuring device for determining a viscosity measurement value, as well as a method and measuring arrangement for determining a volumetric flow measurement value
AssigneeEndress + Hauser Flowtec AG
InventorAlfred Rieder
Life of this patent
Estimating the term…
Abstract
A method for determining a viscosity measurement value of a medium conducted within an oscillatory measuring tube includes exciting at least one oscillation mode of the measuring tube; determining a natural frequency of the oscillation mode; determining the density of the medium; determining the damping of the oscillation mode; and determining the viscosity measurement value depending on the density, the natural frequency, and the damping of the oscillation mode, wherein the viscosity measurement value is determined, depending on a specification of the type of medium, with a model corresponding to the specification.
Claims15
A method for determining a viscosity measurement value of a medium conducted within an oscillatory measuring tube, the method comprising:
- exciting at least one oscillation mode of the oscillatory measuring tube;
- determining a natural frequency of the at least one oscillation mode;
- determining a density of the medium;
- determining a damping of the at least one oscillation mode;
- and
- determining the viscosity measurement value depending on the density, the natural frequency, and the damping of the at least one oscillation mode;
- wherein the viscosity measurement value is determined depending on a specification of a type of the medium with a model corresponding to the specification;
- wherein the specification includes the association of the medium with a substance group, and wherein the model includes a substance group-specific model.
5 more elements
A measuring device for determining a viscosity measurement value of a medium, comprising:
- a measuring sensor, including:
- an oscillatory measuring tube for conducting the medium;
- an exciter for exciting at least one oscillation mode of the oscillatory measuring tube;
- and
- an oscillation sensor for detecting oscillatory measuring tube oscillations;
- and
- a measurement and operation circuit, including:
- a computing unit for driving the exciter and for detecting signals of the oscillation sensor,
- wherein the measurement and operation circuit is configured to:
- excite the at least one oscillation mode of the oscillatory measuring tube;
- determine a natural frequency of the at least one oscillation mode;
- determine a density of the medium;
- determine a damping of the at least one oscillation mode;
- and
- determine the viscosity measurement value depending on the density, the natural frequency, and the damping of the at least one oscillation mode;
- wherein the viscosity measurement value is determined depending on a specification of a type of the medium with a model corresponding to the specification;
- wherein the specification includes the association of the medium with a substance group, and wherein the model includes a substance group-specific model.
14 more elements
A method for determining a volumetric flow measurement value of a flowing medium, comprising:
- determining a preliminary volumetric flow measurement value;
- determining a viscosity measurement value of the medium, including:
- exciting at least one oscillation mode of an oscillatory measuring tube;
- determining a natural frequency of the at least one oscillation mode;
- determining a density of the medium;
- determining a damping of the at least one oscillation mode;
- and
- determining the viscosity measurement value depending on the density, the natural frequency, and the damping of the at least one oscillation mode,
- wherein the viscosity measurement value is determined depending on a specification of a type of the medium with a model corresponding to the specification;
- wherein the specification includes the association of the medium with a substance group, and wherein the model includes a substance group-specific model;
- determining a Reynolds number of the medium based on the preliminary volumetric flow measurement value, the density measurement value, and the viscosity measurement value;
- and
- determining a volumetric flow measurement value, corrected with the Reynolds number, based on the preliminary volumetric flow measurement value and the Reynolds number.
10 more elements
A measuring point for determining a volumetric flow measurement value of a flowing medium, comprising:
- a flowmeter for determining a preliminary volumetric flow measurement value;
- and
- a measuring device, including:
- a measuring sensor, including:
- an oscillatory measuring tube for conducting the medium;
- an exciter for exciting at least one oscillation mode of the oscillatory measuring tube;
- and
- an oscillation sensor for detecting oscillatory measuring tube oscillations;
- and
- a measurement and operation circuit, including:
- a computing unit for driving the exciter and for detecting signals of the oscillation sensor,
- wherein the measurement and operation circuit is configured to:
- excite the at least one oscillation mode of the oscillatory measuring tube;
- determine a natural frequency of the at least one oscillation mode;
- determine a density of the medium;
- determine a damping of the at least one oscillation mode;
- and
- determine the viscosity measurement value depending on the density, the natural frequency, and the damping of the at least one oscillation mode,
- wherein the viscosity measurement value is determined depending on a specification of a type of the medium with a model corresponding to the specification,
- wherein the specification includes the association of the medium with a substance group, and wherein the model includes a substance group-specific model;
- wherein the flowmeter is configured to:
- determine the preliminary volumetric flow measurement value;
- determine a Reynolds number of the medium based on the preliminary volumetric flow measurement value, the density measurement value, and the viscosity measurement value;
- and
- determine the volumetric flow measurement value, corrected with the Reynolds number, based on the preliminary volumetric flow measurement value and the Reynolds number.
22 more elements
A Coriolis mass flowmeter, comprising:
- at least one measuring tube for conducting a medium;
- at least one exciter for exciting at least one oscillation mode of the at least one measuring tube;
- at least two oscillation sensors for detecting measuring tube oscillations and a flow-dependent deformation of the at least one oscillation mode;
- a measurement and operation circuit including a computing unit configured to:
- excite the at least one oscillation mode of the at least one measuring tube;
- determine a natural frequency of the at least one oscillation mode;
- determine a density of the medium;
- determine a damping of the at least one oscillation mode;
- and
- determine the viscosity measurement value depending on the density, the natural frequency, and the damping of the at least one oscillation mode,
- wherein the viscosity measurement value is determined depending on a specification of a type of the medium with a model corresponding to the specification,
- wherein the specification includes the association of the medium with a substance group, and wherein the model includes a substance group-specific model.
9 more elements
Dependencies are inferred from the claim text.