CA2547699A1 - Coriolis mass flow measuring device - Google Patents

Coriolis mass flow measuring device Download PDF

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Publication number
CA2547699A1
CA2547699A1 CA002547699A CA2547699A CA2547699A1 CA 2547699 A1 CA2547699 A1 CA 2547699A1 CA 002547699 A CA002547699 A CA 002547699A CA 2547699 A CA2547699 A CA 2547699A CA 2547699 A1 CA2547699 A1 CA 2547699A1
Authority
CA
Canada
Prior art keywords
value
mass flow
intermediate value
measured
flow rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002547699A
Other languages
French (fr)
Other versions
CA2547699C (en
Inventor
Christian Matt
Alfred Wenger
Michael Fuchs
Wolfgang Drahm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser Flowtec AG
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10358663.6A external-priority patent/DE10358663B4/en
Priority claimed from DE200410007889 external-priority patent/DE102004007889A1/en
Application filed by Individual filed Critical Individual
Publication of CA2547699A1 publication Critical patent/CA2547699A1/en
Application granted granted Critical
Publication of CA2547699C publication Critical patent/CA2547699C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
    • G01F1/8418—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments motion or vibration balancing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8422—Coriolis or gyroscopic mass flowmeters constructional details exciters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8431—Coriolis or gyroscopic mass flowmeters constructional details electronic circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8436—Coriolis or gyroscopic mass flowmeters constructional details signal processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
    • G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
    • G01F1/849—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having straight measuring conduits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
    • G01N11/16—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring damping effect upon oscillatory body
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
    • G01N2009/006—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis vibrating tube, tuning fork

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Measuring Volume Flow (AREA)

Abstract

Disclosed is a Coriolis mass flowmeter/density meter comprising at least one measuring tube (11) through which a two-phase or multiphase medium flows during operation thereof. A supporting means (12) of the Coriolis mass flowmeter/density meter is fixed to an inlet end and an outlet end of the measuring tube (11), thus clamping the same so as to allow the measuring tube (11) to vibrate. The measuring tube (11) is made to vibrate mechanically, particularly to perform bending vibrations, by means of an excitation system (13). The inventive Coriolis mass flowmeter/density meter further comprises means (141, 142) for generating test signals (xs1, xs2 ) representing vibrations at the inlet end and outlet end of the measuring tube (11). An electronic evaluation unit (2) generates an intermediate value (X'm) that is derived from the test signals (xs1, xs2) and represents a tentatively determined mass flow rate as well as a second intermediate value (X2) derived from the test signals (xs1, xs2), especially from a measured value (X.rho.) which is also generated in the electronic evaluation unit (2) and represents a density of the medium, said second intermediate value (X2) representing a measure of a concentration of a phase in the medium. A corrected value (XK) for the first intermediate value (X'm) is determined using the second intermediate value (X2), said corrected value (XK ) being selected among a plurality of predefined values stored in a table memory (56) by means of the intermediate value (X2). The electronic evaluation unit (2) additionally generates a measured value (Xm) representing a mass flow rate with the aid of the intermediate value (X'm) and the corrected value (XK).

Claims (10)

1. Coriolis mass flow meter, especially a Coriolis mass-flow/density meter, for measuring a mass flow rate of a two, or more, phase medium flowing in a pipeline, which Coriolis mass flow meter comprises:

- at least one measuring tube (11) interposed in the pipeline and flowed-through by the medium during operation, - a support means (12), which is fixed to an inlet end and to an outlet end of the measuring tube (11) and thus holds such in an oscillation-permitting manner, - an exciter arrangement (13), which causes the measuring tube (11) to execute mechanical oscillations, especially bending oscillations, during operation, - Oscillation sensors (141, 142) for producing --a first oscillation measurement signal (X s1) representing oscillations at the inlet end of the measuring tube (11), and --a second oscillation measurement signal (X s2) representing oscillations at the outlet end of the measuring tube (11), as well as - a measuring and operating electronics (2), which delivers --an exciter current (i exc) driving the exciter arrangement (13) and --a mass flow rate measured value (X m), which represents the mass flow rate to be measured, - wherein the measuring and operating electronics (2) --produces a first intermediate value (X'm) derived from the oscillation measurement signals (X s1, X s2) and corresponding to the mass flow rate to be measured, as well as produces a correction value (X K) for the first intermediate value (X'm), and --determines the mass flow rate measured value (X m) on the basis of the first intermediate value (X'm) and the correction value (X K), - wherein the measuring and operating electronics (2) produces the correction value (X K) by using at least one, second intermediate value (X2), --which is derived from at least one of the oscillation measurement signals (X
s1, X s2) and/or from the exciter current (i exc), and --which represents a measure for an amount of a phase of the medium, - wherein the measuring and operating electronics (2) --has a table memory (56), in which a plurality of discrete preset values for the correction value (X K) are digitally stored, and --for determining the correction value (X K), uses one of the preset values, which, on the basis of the second intermediate value (X2), is read out of the table memory.
2. Coriolis mass flow meter as claimed in claim 1, - wherein the evaluation electronics (2) delivers, derived from the first and/or the second oscillation measurement signal (X s1, X s2), a density measured value (X p) representing a density of the medium and - wherein the evaluation electronics (2) determines the correction value (X K) using the density measured value (X p).
3. Coriolis mass flow meter as claimed in one of the preceding claims, wherein the evaluation electronics (2) determines, by means of the second intermediate value (X2) a memory address for a preset value in the table memory serving as an instantaneous correction value (X K).
4. Coriolis mass flow meter as claimed in one of the preceding claims, wherein the second intermediate value (X2) is determined on the basis of a scatter, determined at least over a predetermined time interval, of an amplitude of the exciter current (i exc), an amplitude of the oscillation measurement signals (X s1, X s2), an oscillation frequency of the oscillation measurement signals (X s1, X s2), a measured density and/or the first intermediate value (X'm).
5. Coriolis mass flow meter as claimed in one of the preceding claims, wherein the evaluation electronics (2) determines the mass flow rate measured value (X m) based on the functional relationship X m, =(1+X K).X*m .
6. Method for producing a measured value (X m) representing a physical, measured variable, especially a mass flow rate of a medium flowing in a pipeline, by means of a Coriolis mass flow meter, especially a Coriolis mass flow rate/density meter, which method comprises the following steps:

- Causing oscillations, especially bending oscillations, of a Coriolis mass flow meter measuring tube (11) flowed-through by the medium;

- registering oscillations of the measuring tube (11) and producing a first oscillation measurement signal (X s1) representing inlet-end oscillations and a second oscillation measurement signal (X s2) representing outlet-end oscillations;

- developing through use of the two oscillation measurement signals (X s1, X
s2) a first intermediate value (X'm), especially one corresponding to the mass flow rate;

- determining a second intermediate value (X2), especially with use of at least one of the two oscillation measurement signals (X s1, X s2);

- producing a correction value (X K) for the intermediate value (X'm) by means of the second intermediate value (X2), which represents a measure for an amount of a phase of the medium; and - correcting the intermediate value (X'm) by means of the correction value (X
K);

- wherein the correction value (X K) is determined using the second intermediate value (X2) and using a table memory, in which a plurality of discrete, preset values for the correction value (X K) are digitally stored, by identifying the preset value, which is instantaneously to be used for the correction value (X K), on the basis of the second intermediate value (X2) and reading such correction value (X K) out of the table memory.
7. Method as claimed in claim 6, further comprising a step of developing, on the basis of the measurement signals (X s1, X s2), a mass flow rate measured value serving as measured value (X m) and representing a mass flow rate of the medium.
8. Method as claimed in claim 6 or 7, further comprising the following additional steps:

- developing on the basis of the measurement signals (X s1, X s2) a second measured value (X p) representing a density of the medium, and - developing a correction value (X K) using the second measured value (X p).
9. Method as claimed in one of claims 6 to 8, comprising the following additional steps:

- causing an exciter current (i exc) to flow through an electromechanical exciter arrangement (13) coupled mechanically with the measuring tube (11) for causing oscillations of the measuring tube (11), and - determining a second intermediate value (X2), taking the exciter current (i exc) into consideration.
10. Method as claimed in one of the claims 6 to 9, wherein the second intermediate value (X2) represents at least a scatter, determined for a predetermined time interval, of a measured value determined for the medium flowing in the pipeline, especially a measured mass flow rate, a measured density or a measured viscosity, and/or a scatter, determined for a predetermined time interval, of an operational parameter of the Coriolis mass flow meter, especially an amplitude of the oscillation measurement signals (X s1, X
s2) or an oscillation frequency of the oscillation measurement signals (X s1, X s2).
CA2547699A 2003-12-12 2004-12-07 Coriolis mass flow measuring device Expired - Fee Related CA2547699C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10358663.6 2003-12-12
DE10358663.6A DE10358663B4 (en) 2003-12-12 2003-12-12 Coriolis mass flow measuring device
DE102004007889.0 2004-02-17
DE200410007889 DE102004007889A1 (en) 2004-02-17 2004-02-17 Coriolis mass flow density meter for measuring a value representing mass flow of a medium flowing in a pipe line allows a two- or multi-phase medium to flow through a measuring tube
PCT/EP2004/053323 WO2005057137A2 (en) 2003-12-12 2004-12-07 Coriolis mass flowmeter

Publications (2)

Publication Number Publication Date
CA2547699A1 true CA2547699A1 (en) 2005-06-23
CA2547699C CA2547699C (en) 2011-05-17

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CA2547699A Expired - Fee Related CA2547699C (en) 2003-12-12 2004-12-07 Coriolis mass flow measuring device
CA2547697A Expired - Fee Related CA2547697C (en) 2003-12-12 2004-12-07 Coriolis mass-flow measuring device

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Application Number Title Priority Date Filing Date
CA2547697A Expired - Fee Related CA2547697C (en) 2003-12-12 2004-12-07 Coriolis mass-flow measuring device

Country Status (4)

Country Link
EP (2) EP1692466A2 (en)
CA (2) CA2547699C (en)
RU (2) RU2348012C2 (en)
WO (2) WO2005057137A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046319A1 (en) 2005-09-27 2007-03-29 Endress + Hauser Flowtec Ag Two or multi-phase medium e.g. fluid`s, physical flow parameter e.g. flow rate, measuring method, involves producing measurement values representing parameter by considering pressure difference of medium and by usage of transfer function
DE102012011932B4 (en) * 2012-06-18 2016-09-15 Krohne Messtechnik Gmbh Method for operating a resonance measuring system and related resonance measuring system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524610A (en) * 1983-09-02 1985-06-25 National Metal And Refining Company, Ltd. In-line vibratory viscometer-densitometer
US5796012A (en) * 1996-09-19 1998-08-18 Oval Corporation Error correcting Coriolis flowmeter
DE59904728D1 (en) * 1998-12-11 2003-04-30 Flowtec Ag Coriolis mass flow / DENSITY METER

Also Published As

Publication number Publication date
WO2005057137A2 (en) 2005-06-23
RU2006124841A (en) 2008-01-20
WO2005057137A9 (en) 2005-10-27
WO2005057131A3 (en) 2005-09-29
RU2339007C2 (en) 2008-11-20
WO2005057131A9 (en) 2005-08-25
RU2006124840A (en) 2008-01-20
CA2547697C (en) 2011-05-17
CA2547697A1 (en) 2005-06-23
RU2348012C2 (en) 2009-02-27
CA2547699C (en) 2011-05-17
EP1692467A2 (en) 2006-08-23
EP1692466A2 (en) 2006-08-23
WO2005057137A3 (en) 2005-09-29
WO2005057131A2 (en) 2005-06-23

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Effective date: 20181207