WO2021228531A1 - Capteur de mesure de coriolis et dispositif de mesure de coriolis - Google Patents

Capteur de mesure de coriolis et dispositif de mesure de coriolis Download PDF

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Publication number
WO2021228531A1
WO2021228531A1 PCT/EP2021/060711 EP2021060711W WO2021228531A1 WO 2021228531 A1 WO2021228531 A1 WO 2021228531A1 EP 2021060711 W EP2021060711 W EP 2021060711W WO 2021228531 A1 WO2021228531 A1 WO 2021228531A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
measuring
measuring tube
arrangement
coriolis
Prior art date
Application number
PCT/EP2021/060711
Other languages
German (de)
English (en)
Inventor
Hao Zhu
Martin Josef ANKLIN
Ennio Bitto
Original Assignee
Endress+Hauser Flowtec Ag
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
Application filed by Endress+Hauser Flowtec Ag filed Critical Endress+Hauser Flowtec Ag
Publication of WO2021228531A1 publication Critical patent/WO2021228531A1/fr

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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
    • G01F1/8427—Coriolis or gyroscopic mass flowmeters constructional details detectors
    • 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

Definitions

  • the invention relates to a Coriolis measuring sensor and a Coriolis measuring device with a temperature measuring device integrated in a sensor or in an exciter.
  • Coriolis measuring devices make use of the fact that an oscillation impressed on a measuring tube is distorted in a characteristic way compared to an oscillation without a flow, depending on the flow of a medium through the measuring tube. These vibrations are impressed and recorded using exciters or sensors. Usually, the measuring tube is excited to vibrate in a fundamental vibration mode, the flow causing a deflection in a higher vibration mode.
  • Coriolis measuring devices exist in different designs, the following documents show Coriolis measuring devices with two structurally identical measuring tubes, EP2271899B1 disclosing a Coriolis measuring device with two straight measuring tubes and DE102016112600A1 a Coriolis measuring device with two curved measuring tubes.
  • WO2014 / 084835A1 shows a Coriolis measuring device in which two vibration sensors are attached to two measuring tubes in the immediate vicinity and are each controlled by an electrical connection.
  • the object is achieved by a Coriolis measuring sensor according to independent claim 1 and by a Coriolis measuring device according to independent claim 14.
  • the sensor arrangements each have at least one coil and each at least one magnet, with relative movements caused by measuring tube vibrations Induce electrical voltages in the coil between the coil and the magnet, which can be picked up as a measuring signal by the electronic measuring / operating circuit.
  • the serial connection of the sensor arrangements of an extended sensor group according to the invention i.e. the series connection of the coils of the sensor arrangements of the extended sensor group, enables a stronger measurement signal to be obtained and, at the same time, not to increase the complexity of the electronic measurement / operating circuit, since no further measurement signal input has to be provided.
  • the f1 mode is the basic oscillation mode, which is mirror-symmetrical with respect to a measuring tube cross-sectional plane that intersects the measuring tube in the middle. Setting up at least one extended sensor group with at least two sensor arrangements enables a better signal / noise ratio for the flow rate or density measurement.
  • the sensor arrangements of the extended sensor group are arranged either on the outside or on the inside, a first sensor arrangement being arranged in a first cross section of the measuring tube center line, and a second sensor arrangement being arranged in a second cross section of the measuring tube center line, the first sensor arrangement is offset by a first offset length with respect to the second sensor arrangement in the direction of the exciter arrangement along the measuring tube center line.
  • the measuring tube is set up to form an f2 mode, i.e. a mode of the second order, when a medium flows through, the f2 mode having an inner oscillation node and an f2 amplitude maximum between the inner oscillation node and an outer oscillation node second sensor arrangement is arranged in a region of the f2 amplitude maximum, and wherein the first sensor arrangement is arranged in a region of a maximum ratio of f2 amplitude to f1 amplitude.
  • an f2 mode i.e. a mode of the second order
  • a good signal / noise ratio can be found in the region of the f2 amplitude maximum, and a maximum lies in the region of the maximum ratio of f2 amplitude to f1 amplitude Time shift between an inlet-side first sensor arrangement and an outlet-side first sensor arrangement.
  • the f2 mode is the first higher order oscillation mode, that is, the second order, and is point-symmetrical with respect to its deflection from a base state with respect to a measuring tube cross-sectional plane that intersects the measuring tube in the middle.
  • a first sensor arrangement is arranged on the outside and a second sensor arrangement is arranged on the inside.
  • Adding the sensor signal of the inner sensor arrangement to a sensor signal of the outer sensor arrangement leads to an at least partial cancellation of the influence of a measuring tube torsion on the sensor signal. In this way, an improved determination of a mass flow or density measured value can be obtained.
  • the inner sensor arrangement is offset by a second offset length with respect to the outer sensor arrangement in the direction of the exciter arrangement along the measuring tube center line, the inner sensor arrangement experiencing a torsion amplitude of the measuring tube which is less than 20% and in particular less than 10% of the torsion amplitude of the Measuring tube deviates in the outer sensor arrangement.
  • the senor has an even number of measuring tubes, two measuring tubes each forming a measuring tube pair, the measuring tubes of a measuring tube pair being set up to oscillate in opposite directions, the measuring tubes of a measuring tube pair being designed as a mirror image with respect to a mirror plane arranged between the corresponding measuring tube longitudinal planes .
  • the fixing device is set up to couple the measuring tubes of at least one measuring tube pair to one another, the fixing device having a first clamping device for fixing the vibration node in the area of the inlet or outlet, and the fixing device on a side of the first clamping device facing away from the exciter arrangement has at least one second clamping device for suppressing a measuring tube oscillation on the side of the first clamping device facing away from the exciter arrangement.
  • the first clamping device and / or the second clamping device is plate-shaped and each at least partially surrounds the measuring tubes of a measuring tube pair.
  • the senor is set up for high-pressure applications, the ratio of the outer diameter of the measuring tube to the wall thickness being at most 20 and in particular at most 17 and preferably at most 15, and / or with a minimum pressure being 40 bar and in particular 70 bar and preferably 100 bar.
  • the measuring transducer has two collectors, a first collector on an upstream side of the measuring transducer being set up to receive a medium flowing into the measuring transducer from a pipeline and guiding it to the inlet of the at least one measuring tube, a second collector being set up to do this is to take up the medium emerging from the outlet of the at least one measuring tube and guide it into the pipeline.
  • the measuring sensor has two process connections, in particular flanges, which are designed to connect the measuring sensor to a pipeline.
  • the measuring sensor has a carrier tube with a carrier tube chamber, which carrier tube chamber is designed to house the at least one measuring tube at least in sections.
  • the exciter arrangement has at least one movable exciter element and at least one stationary exciter element, wherein the movable exciter element is arranged on a measuring tube, and / or wherein the sensor arrangement has at least one movable sensor element and at least one stationary sensor element, the movable sensor element on a Measuring tube is arranged and is set up to follow the movements of the measuring tube, wherein the stationary exciter or sensor element is in particular a coil device, and wherein the movable exciter or sensor element is in particular a permanent magnet.
  • a Coriolis measuring device comprises a Coriolis measuring sensor according to one of the preceding claims; an electronic measuring / operating circuit, the electronic measuring / operating circuit being set up to operate the exciter arrangement and the sensor arrangements, The electronic measuring / operating circuit is further set up to determine and provide flow measurement values and / or density measured values based on the vibration properties of the measuring tube measured by means of the sensor assemblies, the electronic measuring / operating circuit being connected to the sensor assemblies and to the exciter assembly by means of electrical connections is, wherein the measuring device has in particular an electronics housing for housing the electronic measuring / operating circuit.
  • FIG. 1 outlines the structure of a typical Coriolis measuring device
  • FIG. 2 outlines the schematic course of measuring tube oscillation modes and the position of characteristic points, lines and planes
  • FIG. 3 outlines a schematic measuring tube with an exemplary sensor arrangement according to the invention
  • FIG. 4 outlines a schematic measuring tube with an exemplary sensor arrangement according to the invention.
  • FIG. 1 outlines the structure of a Coriolis measuring device 1 with a Coriolis measuring sensor 10, the measuring sensor having two measuring tubes 11 each with an inlet 11.1 and an outlet 11.2, an exciter arrangement 12.2, two sensor arrangements 13.2, two collectors 17 and two process connections 18 has.
  • the exciter arrangement is set up to excite the two measuring tubes to vibrate perpendicular to a measuring tube longitudinal plane defined in each case by the curved measuring tubes.
  • the sensor arrangements are set up to detect the vibration impressed on the measuring tubes.
  • a first collector 17.1 on an upstream side of the measuring transducer is set up to receive a medium flowing into the measuring transducer from a pipeline and to guide it to the inlets of the two measuring tubes, a second collector 17.2 is set up to take the medium flowing out of the outlets of the two measuring tubes Take up the medium and feed it into the pipeline.
  • the collectors for their part each open into a process connection 18, which, as shown here, can be flanges 18.1.
  • the process sensors are set up to connect the Coriolis sensor or the Coriolis measuring device to a pipeline.
  • the Coriolis measuring transducer is connected to an electronics housing 80 of the Coriolis measuring device, which is set up to house an electronic measuring / operating circuit 77, which measuring / operating circuit is set up to operate the exciter arrangement and the sensor arrangements and based on to determine and make available the vibration properties of the measuring tube measured by means of the sensor arrangements.
  • the exciter arrangement and the sensor arrangements are by means of electrical connections 19 connected to the electronic measuring / operating circuit.
  • the electrical connections 19 can each be combined by cable guides.
  • the Coriolis measuring transducer also has a fixing device 15 which is set up to define external vibration nodes of measuring tube vibrations.
  • a Coriolis measuring device is not limited to the presence of two measuring tubes.
  • One-pipe or multi-pipe systems with more than two pipes are also conceivable.
  • FIG. 2 shows a sketch-like plan view of a measuring tube 11 along an associated measuring tube longitudinal plane MLE. Vibrations that are impressed on the measuring tube by an exciter arrangement have oscillation amplitudes perpendicular to the longitudinal plane of the measuring tube, as indicated by the double arrow.
  • An f1 mode is mirror-symmetrical with respect to a measuring tube cross-sectional plane which intersects the measuring tube in the middle
  • an f2 mode is a vibration mode of the second order, with an amplitude distribution along the measuring tube center line being point-symmetrical with respect to an intersection of the measuring tube cross-sectional plane with the measuring tube center line.
  • the f1 mode has an amplitude distribution with a maximum, which maximum lies in the middle between the outer oscillation nodes ASK.
  • the f2 mode has an inner oscillation node ISK in the middle between the outer oscillation nodes, an extremum of the amplitude distribution being found between the inner oscillation node and an outer oscillation node in each case.
  • FIG. 3 outlines a schematic measuring tube 11 with an exemplary sensor group 13 according to the invention.
  • the measuring tube is clamped by means of a fixing device 15 so that nodes KP are defined on a measuring tube center line MML, at which measuring tube vibrations each have an outer node.
  • the fixing device has a first clamping device 15.1 on the inlet side and a second clamping device 15.2 on the outlet side, which can, for example, be plate-shaped.
  • the nodes KP define a longitudinal axis LA, with respect to which the measuring tube has an inside IS and an outside AS between the nodes.
  • the exciter arrangement 12.2 is arranged centrally on the outside of the measuring tube, but can also be arranged on the inside of the measuring tube.
  • a sensor group 13 with at least one sensor arrangement 13.2 is arranged between the exciter arrangement and a respective clamping device 15.1, 15.2.
  • at least one sensor group is an extended sensor group 13.1 with at least two sensor arrangements 13.2, two outer sensor arrangements 13.21 being arranged on the outside of the measuring tube, which are offset by an offset length VL1 along the measuring tube center line MML.
  • the Sensor arrangements can also be inner sensor arrangements.
  • the second sensor arrangement is arranged in an area of the f2 amplitude maximum
  • the first sensor arrangement is arranged in an area of a maximum ratio of f2 amplitude to f1 amplitude.
  • An electrical connection 19 according to the invention which serially connects the sensor arrangements of an extended sensor arrangement 13.1, is shown schematically.
  • an expanded sensor group according to the invention has an inner sensor arrangement and an outer sensor arrangement, which are preferably offset by an offset length VL2 along the measuring tube center line MML.
  • a measuring tube torsion can be at least partially compensated for by setting up an outer sensor arrangement and an inner sensor arrangement.
  • the second offset length can have a value of 0.5 to 2 measuring tube diameters, for example.
  • An electrical connection 19 according to the invention which serially connects the sensor arrangements of an extended sensor arrangement 13.1, is shown schematically.
  • serial connection of the sensor arrangements of an extended sensor group according to the invention i.e. the series connection of the coils of the sensor arrangements of the extended sensor group, enables a stronger measurement signal to be obtained and, at the same time, not to increase the complexity of the electronic measurement / operating circuit, since no further measurement signal input has to be provided.
  • MML measuring tube center line MLE measuring tube longitudinal plane
  • ASK outer vibration node ISK inner vibration node LA longitudinal axis
  • Q1 first cross section Q2 second cross section
  • VL1 first offset length VL2 second offset length

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un capteur de mesure de Coriolis (10), comprenant : au moins un tube de mesure ; au moins un dispositif d'excitation (12.1) ; au moins deux groupes de capteurs d'agencements de capteurs, comprenant chacun au moins un agencement de capteurs, dans lequel au moins certaines parties du ou des tubes de mesure sont incurvées, le tube de mesure étant serré au niveau de l'entrée et de la sortie, respectivement, par un élément de fixation, dans lequel le tube de mesure a un côté intérieur (IS) faisant face à l'axe longitudinal et un côté extérieur (AS), opposé à l'axe longitudinal, dans lequel le dispositif d'excitation est disposé dans une zone centrale du tube de mesure, dans lequel un premier groupe de capteurs est disposé dans une zone intermédiaire côté entrée du tube de mesure et un deuxième groupe de capteurs est disposé dans une zone intermédiaire côté sortie du tube de mesure, dans lequel au moins un groupe de capteurs (13) est un groupe de capteurs étendu (13.1) et comprend au moins deux agencements de capteurs (13.2), dans lequel les agencements de capteurs d'un groupe de capteurs sont connectés à une conduite de raccordement électrique et conçus pour être connectés en série à un circuit électronique de mesure/fonctionnement (77) du capteur de mesure de Coriolis au moyen de la conduite de raccordement.
PCT/EP2021/060711 2020-05-13 2021-04-23 Capteur de mesure de coriolis et dispositif de mesure de coriolis WO2021228531A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020112893.2 2020-05-13
DE102020112893 2020-05-13

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WO2021228531A1 true WO2021228531A1 (fr) 2021-11-18

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0933310A (ja) * 1995-07-14 1997-02-07 Tokico Ltd 振動式測定装置
JP2005106575A (ja) * 2003-09-30 2005-04-21 Hitachi Ltd 振動式測定装置
US8596143B2 (en) * 2010-09-16 2013-12-03 Endress + Hauser Flowtec Ag Measuring system having a measuring transducer of vibration-type
WO2014084835A1 (fr) 2012-11-29 2014-06-05 Micro Motion, Inc. Détection d'un changement dans la surface de section transversale d'un tube de fluide dans un dispositif de mesure vibrant par la détermination d'une rigidité de mode latéral
DE102016112600A1 (de) 2016-07-08 2018-01-11 Endress + Hauser Flowtec Ag Meßsystem
EP2271899B1 (fr) 2008-03-25 2018-02-28 Micro Motion, Inc. Débitmètre vibrant à double capteur de mesure
EP3495784A1 (fr) * 2017-12-07 2019-06-12 Heinrichs Messtechnik GmbH Débitmètre massique coriolis
DE102018110495A1 (de) * 2018-05-02 2019-11-07 Endress+Hauser Flowtec Ag Coriolis-Messaufnehmer und Coriolis-Messgerät

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0933310A (ja) * 1995-07-14 1997-02-07 Tokico Ltd 振動式測定装置
JP2005106575A (ja) * 2003-09-30 2005-04-21 Hitachi Ltd 振動式測定装置
EP2271899B1 (fr) 2008-03-25 2018-02-28 Micro Motion, Inc. Débitmètre vibrant à double capteur de mesure
US8596143B2 (en) * 2010-09-16 2013-12-03 Endress + Hauser Flowtec Ag Measuring system having a measuring transducer of vibration-type
WO2014084835A1 (fr) 2012-11-29 2014-06-05 Micro Motion, Inc. Détection d'un changement dans la surface de section transversale d'un tube de fluide dans un dispositif de mesure vibrant par la détermination d'une rigidité de mode latéral
DE102016112600A1 (de) 2016-07-08 2018-01-11 Endress + Hauser Flowtec Ag Meßsystem
EP3495784A1 (fr) * 2017-12-07 2019-06-12 Heinrichs Messtechnik GmbH Débitmètre massique coriolis
DE102018110495A1 (de) * 2018-05-02 2019-11-07 Endress+Hauser Flowtec Ag Coriolis-Messaufnehmer und Coriolis-Messgerät

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