CA2622602A1 - Method for measuring a medium flowing in a pipeline and measurement system therefor - Google Patents

Method for measuring a medium flowing in a pipeline and measurement system therefor Download PDF

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Publication number
CA2622602A1
CA2622602A1 CA002622602A CA2622602A CA2622602A1 CA 2622602 A1 CA2622602 A1 CA 2622602A1 CA 002622602 A CA002622602 A CA 002622602A CA 2622602 A CA2622602 A CA 2622602A CA 2622602 A1 CA2622602 A1 CA 2622602A1
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CA
Canada
Prior art keywords
medium
measuring
measuring device
measuring tube
pressure
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Granted
Application number
CA002622602A
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French (fr)
Other versions
CA2622602C (en
Inventor
Wolfgang Drahm
Alfred Rieder
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Endress and Hauser Flowtec AG
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Individual
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Classifications

    • 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
    • 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
    • G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • 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
    • G01F1/8404—Coriolis or gyroscopic mass flowmeters details of flowmeter manufacturing methods
    • 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
    • G01F1/8431—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
    • G01F1/845—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
    • G01F1/8472—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
    • 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
    • G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Measuring Volume Flow (AREA)

Abstract

For measuring the medium flows through at least one inline measuring device measuring tube joined into the course of a pipeline. Using an inline measuring device sensor arrangement arranged on the measuring tube and reacting to changes of the at least one parameter of the medium, at least one measurement signal, influenced by at least one physical parameter of the medium in the measuring tube, is produced. Additionally, pressures effective in the medium are registered, to determine a pressure difference existing in the flowing medium. Based on the pressure difference currently determined and a transfer function, measured values representing the at least one parameter are produced, where the transfer function determines how the measured values of the first kind are generated under application of the pressure difference currently determined. Based on the measurement signal of the sensor arrangement, the transfer function is adapted to the medium to be measured.

Claims (38)

1. Method for measuring at least one flow parameter, especially a flow velocity, a mass flow or a volume flow, of, an at least at times, two or more phase medium flowing in a pipeline, with at least one of the phases of the medium being fluid, which method comprises the following steps:
- Causing the medium to be measured to flow through at least one measuring tube joined into the course of the pipeline, especially a measuring tube which vibrates, at least at times;
- producing at least one measurement signal influenced by at least one physical parameter, especially a flow velocity, a mass flow, a volume flow, a density and/or a viscosity, of the medium in the measuring tube, using an inline measuring device sensor arrangement arranged on the measuring tube and/or in its vicinity and reacting, at least mediately, to changes of the at least one physical parameter of the medium;
- registering pressures, especially static pressures, effective in the medium, in order to repeatedly determine a pressure difference existing in the flow medium, especially a pressure difference existing, at least in part, along the at least one measuring tube; as well as - producing measured values of a first kind, which represent, especially digitally, following one after the other in time, the at least one flow parameter to be measured for the medium, taking into consideration a currently determined pressure difference for the flowing medium, as well as applying a transfer function;
- wherein the transfer function at least determines how the measured values of the first kind are generated taking into consideration the pressure difference currently determined for the flowing medium; and - wherein the transfer function is adapted repeatedly to the medium to be measured, taking into consideration the at least one measurement signal produced by means of the sensor arrangement of the inline measuring device.
2. Method as claimed in the preceding claim, further comprising the step of producing measured values of a second kind, which represent, following one after the other in time, the at least one parameter of the medium in the measuring tube, or a measured variable derived therefrom for the medium, by applying the at least one measurement signal produced by means of the inline measuring device.
3. Method as claimed in the preceding claim, wherein measured values of the first kind and measured values of the second kind are produced essentially simultaneously or at least at times near to one another.
4. Method as claimed in claim 2, wherein measured values of the first kind and measured values of the second kind are produced asynchronously or at least offset with respect to time, especially alternately.
5. Method as claimed in one of the claims 2 to 4, wherein measured values of the second kind are produced, at least at times, when the medium is developed essentially as one phase or is at least assumed to be developed as one phase.
6. Method as claimed in the preceding claim, further comprising the step of repeatedly monitoring the flowing medium, especially by applying the at least one measurement signal produced by means of the inline measuring device.
7. Method as claimed in the preceding claim, further comprising a step of detecting that the medium is developed in the form of at least two phases.
8. Method as claimed in one of the preceding claims, wherein the inline measuring device further includes an electrical-to-physical exciter mechanism arranged on the at least one measuring tube and acting, at least mediately, on the medium conveyed therein.
9. Method as claimed in the preceding claim, wherein the step of producing the first measurement signal comprises the following steps:
- Producing, by means of the exciter mechanism of the inline measuring device, reactions in the medium, which reactions correspond with the at least one physical parameter of the medium in the measuring tube; and - registering, by means of the sensor arrangement of the inline measuring device, reactions of the medium corresponding to the at least one physical parameter of the medium in the measuring tube.
10. Method as claimed in the preceding claim, wherein the inline measuring device includes a measurement pickup of vibration-type, and wherein the step of producing reactions in the medium corresponding with the at least one, physical parameter of the medium in the measuring tube includes a step of causing the measuring tube to vibrate for producing reaction forces, especially inertial forces, frictional forces and/or Coriolis forces, in the medium conveyed in the measuring tube, for influencing vibrations of the measuring tube.
11. Method as claimed in the preceding claim, wherein the step of registering reactions of the medium corresponding with the at least one physical parameter of the medium includes a step of registering vibrations of the measuring tube.
12. Method as claimed in the preceding claim, wherein the measured values of the second kind are determined, at least in part, on the basis of registered vibrations of the measuring tube.
13. Method as claimed in one of the claims 10 to 12, wherein the sensor arrangement of the inline measuring device includes at least one oscillation sensor arranged on the measuring tube and/or in its vicinity, and wherein the at least one measurement signal produced by means of the sensor arrangement of the inline measuring device represents vibrations of the measuring tube.
14. Method as claimed in the preceding claim, wherein the measured values of the second kind are generated, at least at times and/or at least in part, based on an oscillation frequency of the vibrating measuring tube, especially with application of the at least one measurement signal.
15. Method as claimed in claim 13 or 14, wherein the sensor arrangement of the inline measuring device includes at least two oscillation sensors, especially ones spaced from one another in the stream direction of the medium, in each case arranged on the measuring tube and/or in its vicinity, and wherein the steps of producing the measurement signal by means of the sensor arrangement includes steps of producing at least a first measurement signal, especially one representing inlet-side vibrations of the measuring tube, by means of a first oscillation sensor of the sensor arrangement, and a second measurement signal, especially one representing outlet-side vibrations of the measuring tube, by means of a second oscillation sensor of the sensor arrangement.
16. Method as claimed in the preceding claim, wherein the measured values of the second kind represent a mass flow or a volume flow of the medium, and wherein, for determining at least one of these measured values of the second kind, the at least two measurement signals produced by means of the sensor arrangement of the inline measuring device are applied.
17. Method as claimed in claim 15 or 16, wherein the measured values of the second kind are determined, at least at times and/or at least in part, based on a phase difference existing between the first and second measurement signals.
18. Method as claimed in one of the claims 2 to 17, wherein the measured values of the second kind represent a parameter of the medium, which corresponds essentially to the flow parameter represented by the measured values of the first kind.
19. Method as claimed in one of the claims 2 to 15, wherein the measured values of the second kind represent a density of the medium in the measuring tube.
20. Method as claimed in one of the claims 2 to 15, wherein the measured values of the second kind represent a viscosity of the medium in the measuring tube.
21. Method as claimed in one of the preceding claims, wherein the steps of registering pressures effective in the medium include steps of registering at least one pressure effective in the flowing medium at the inlet-side of the at least one measuring tube and/or registering at least one pressure effective in the flowing medium at the outlet-side of the at least one measuring tube.
22. Method as claimed in the preceding claim, wherein, at least at times, at least a first pressure in the medium registered at the inlet-side of the measuring tube and at least a second pressure in the medium registered at the outlet-side of the measuring tube, especially a pressure difference in the flowing medium determined on the basis of the first and second pressures, are taken into consideration in producing the measured values representing the at least one physical, flow parameter.
23. Method as claimed in one of the preceding claims, wherein, for registering pressures existing in the flowing medium, at least two pressure pickups are used, of which a first pressure pickup is arranged at the inlet-side of the at least one measuring tube and a second pressure pickup is arranged at the outlet-side of the at least one measuring tube.
24. Method as claimed in the preceding claim, wherein the steps of registering pressures effective in the medium include steps of transmitting pressures registered by means of the first and second pressure pickups via pressure intermediaries to a pressure measuring cell, especially a differentially and/or capacitively measuring, pressure measuring cell.
25. Method as claimed in the preceding claim, wherein the steps of registering pressures effective in the medium include steps of converting pressures transmitted to the pressure measuring cell into at least one measurement signal, which reacts to time changes of at least one of the registered changes with a corresponding change of at least one of its properties.
26. Method as claimed in one of the preceding claims, wherein the transfer function comprises a static, especially non-linear, characteristic line function.
27. Method as claimed in the preceding claim, wherein, for adapting the transfer function to the medium to be measured, at least one coefficient describing the transfer function is changed by applying the at least one measurement signal produced by means of the sensor arrangement of the inline measuring device.
28. Method as claimed in one of the claims 2 to 25, wherein the transfer function comprises a static, especially non-linear, characteristic line function, and wherein, for adapting the transfer function to the medium to be measured, at least one coefficient describing the transfer function is changed, taking into consideration at least one of the measured values of the second kind.
29. Measuring system for measuring at least one physical, flow parameter, especially a mass and/or volume flow and/or a flow velocity, of an, at least at times, two, or more, phase medium flowing in a pipeline, wherein at least one phase of the medium is fluid, which measuring system comprises:
- An inline measuring device for flowing media, wherein the inline measuring device includes a flow pickup, as well as a measuring device electronics electrically coupled, at least at times, therewith, and wherein the flow pickup includes at least one measuring tube inserted into the course of the pipeline conveying the medium, especially a measuring tube vibrating, at least at times, during operation; and - a pressure-difference measuring device including a first pressure pickup, especially one arranged at the inlet side of the flow pickup, for registering a first pressure existing in the medium, and a second pressure pickup, especially one arranged at the outlet side of the flow pickup, for registering a second pressure existing in the medium, as well as including measuring device electronics, which, at least at times, is electrically coupled with the pressure pickups and, at least at times, is electrically coupled with the measuring device electronics of the inline measuring device;
- wherein at least one of the two measuring device electronics, on the basis of a transfer function stored therein, as well as based on the pressures registered by means of the first and second pressure pickups, at least at times, produces measured values of a first kind, which represent, in time following one after the other, especially digitally, the at least one flow parameter of the medium to be measured;
- wherein the measuring device electronics of the inline measuring device produces, at least at times, measured values of a second kind, which represent, in time following one after the other, especially digitally, the at least one parameter, or a measured variable derived therefrom, of the medium in the at least one measuring tube; and - wherein the transfer function determines, at least, how the measured values of the first kind are generated on the basis of the currently registered, first and second pressures, and is adapted to the medium to be measured, taking into consideration at least one of the measured values of the second kind produced by means of the inline measuring device.
30. Measurement system as claimed in the preceding claim, wherein the at least one measuring tube vibrates, at least at times, during operation.
31. Measurement system as claimed in the preceding claim, wherein the flow pickup delivers at least one measured signal representing vibrations of the at least one measuring tube.
32. Measurement system as claimed in one of the claims 29 to 31, wherein the at least one measuring tube is essentially straight.
33. Measurement system as claimed in one of the claims 29 to 31, wherein the at least one measuring tube is curved, especially in U- or V-shape.
34. Measurement system as claimed in one of the claims 29 to 33, comprising two measuring tubes inserted into the course of the pipeline, especially measuring tubes extending essentially parallel to one another and/or essentially of equal construction.
35. Measurement system as claimed in one of the claims 29 to 34, wherein the two pressure pickups are connected with a pressure measurement cell, especially one measuring differentially or capacitively, to form a pressure-difference pickup.
36. Measurement system as claimed in the preceding claim, wherein the difference-pressure pickup delivers at least one measurement signal representing a pressure difference in the flowing medium.
37. Measurement system as claimed in one of the claims 29 to 35, comprising a first measuring device electronics, as well as a second measuring device electronics communicating, at least at times, with the first measuring device electronics, wherein the flow pickup is electrically coupled with the first measuring device electronics to form an inline measuring device for media flowing in pipelines, especially a Coriolis mass flow/density measuring device, and wherein the two pressure pickups are electrically coupled with the second measuring device electronics to form a pressure difference measuring device for media flowing in pipelines.
38. Use of the measurement system as claimed in one of the claims 29 to 37 for measuring a mass-, or volume-, flow and/or a flow velocity of a multiphase, especially a two-phase, medium flowing in a pipeline, especially for performing a method as claimed in one of the claims 1 to 28.
CA2622602A 2005-09-27 2006-09-07 Method for measuring a medium flowing in a pipeline and measurement system therefor Active CA2622602C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005046319.3 2005-09-27
DE102005046319A DE102005046319A1 (en) 2005-09-27 2005-09-27 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
PCT/EP2006/066119 WO2007036418A1 (en) 2005-09-27 2006-09-07 Process for measuring a medium flowing in a pipe, and also measurement system therefor

Publications (2)

Publication Number Publication Date
CA2622602A1 true CA2622602A1 (en) 2007-04-05
CA2622602C CA2622602C (en) 2012-07-10

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CA2622602A Active CA2622602C (en) 2005-09-27 2006-09-07 Method for measuring a medium flowing in a pipeline and measurement system therefor

Country Status (6)

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EP (2) EP2772730B1 (en)
CA (1) CA2622602C (en)
DE (1) DE102005046319A1 (en)
DK (1) DK1931949T3 (en)
RU (1) RU2390733C2 (en)
WO (1) WO2007036418A1 (en)

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WO2007036418A1 (en) 2007-04-05
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RU2390733C2 (en) 2010-05-27
CA2622602C (en) 2012-07-10

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