DE102004023600A1 - Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator - Google Patents
Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator Download PDFInfo
- Publication number
- DE102004023600A1 DE102004023600A1 DE200410023600 DE102004023600A DE102004023600A1 DE 102004023600 A1 DE102004023600 A1 DE 102004023600A1 DE 200410023600 DE200410023600 DE 200410023600 DE 102004023600 A DE102004023600 A DE 102004023600A DE 102004023600 A1 DE102004023600 A1 DE 102004023600A1
- Authority
- DE
- Germany
- Prior art keywords
- measuring tube
- carrier element
- oscillator
- vibrations
- tube
- 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.)
- Ceased
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
- 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
- G01F1/845—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
- 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)
- Measuring Volume Flow (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Sensor zur Bestimmung von Massendurchfluss und Dichte strömender Medien sowie ein Verfahren zur Betätigung des Sensors gemäß der Patentansprüche 1 und 7.The The invention relates to a sensor for determining mass flow and density flowing Media and a method for actuating the sensor according to claims 1 and 7th
Ein solcher Sensor wird dazu genutzt, den Massendurchfluss und die Dichte eines Mediums zu bestimmen, das durch eine Rohrleitung strömt.One such sensor is used to measure mass flow and density of a medium flowing through a pipeline.
Aus
der
Der Erfindung liegt die Aufgabe zugrunde, einen Sensor der eingangs genannten Art zu schaffen, bei dem auf eine Auslegermasse verzichtet und das Einwirken von Reaktionskräften auf die Aufhängungen des Messrohres unterbunden wird. Ferner ist es Aufgabe der Erfindung ein Verfahren aufzuzeigen, mit dem ein solcher Sensor betrieben werden kann.Of the Invention is based on the object, a sensor of the above to give said type in which waived a boom mass and the application of reaction forces to the suspensions the measuring tube is prevented. Furthermore, it is an object of the invention to show a method with which operated such a sensor can be.
Die Aufgabe, den Sensor betreffend, wird durch die Merkmale des Patentanspruchs 1 gelöst.The Task, concerning the sensor, is characterized by the features of the claim 1 solved.
Die Aufgabe, das Verfahren betreffend, wird durch die Merkmale des Patentanspruchs 7 gelöst.The Task, concerning the method, is characterized by the features of the claim 7 solved.
Der erfindungsgemäße Sensor ist mit einem einzigen, geraden Messrohr ausgerüstet. Es kann so in eine Rohrleitung eingefügt werden, das ein Medium, das durch die Rohrleitung strömt, ebenfalls störungsfrei durch dieses Messrohr strömen kann. Das Messrohr des Sensors weist keine Auslegermasse auf. Das Auftreten von Reaktionskräften an den Aufhängungen des Messrohres wird dadurch verhindert, dass die Schwingungen des Messrohres an die Schwingungen eines zusätzlichen Oszillators gekoppelt werden. Der zusätzliche Oszillator wird so dimensioniert, dass seine individuelle Resonanzfrequenz den gleichen Wert hat wie die Resonanzfrequenz des Messrohres im nicht gekoppelten Zustand. Als zusätzlicher Oszillator wird ein Trägerelement genutzt, das an die Enden des Messrohres gekoppelt ist, und das Messrohr hüllenartig umgibt. Das Trägerelement ist vorzugsweise als Rohr ausgebildet. Ein geschlossener Rahmen kann jedoch hierfür auch genutzt werden. Als zusätzliche Schwingungen werden die Torsionsbewegungen des Trägerelements genutzt. Das Trägerelement ist zudem so ausgebildet und installiert, dass seine Schwerlinie in Längsrichtung parallel zur Längsachse des Messrohres verläuft, jedoch nicht mit der Längsachse des Mehrohres zusammenfällt. Zudem sind die Drehsteifigkeit und das Trägheitsmoment des Trägerelements so dimensioniert, dass die resultierende Torsionsfrequenz mit der Biegeschwingungsresonanzfrequenz des Messrohres übereinstimmt.Of the inventive sensor is equipped with a single, straight measuring tube. It can be so in a pipeline added This is also a medium that flows through the pipeline trouble-free flow through this measuring tube can. The measuring tube of the sensor has no cantilever mass. The Occurrence of reaction forces on the suspensions of the measuring tube is prevented by the fact that the vibrations of the Measuring tube coupled to the vibrations of an additional oscillator become. The additional Oscillator is dimensioned so that its individual resonant frequency the same value as the resonance frequency of the measuring tube in not coupled state. As additional Oscillator becomes a carrier element used, which is coupled to the ends of the measuring tube, and the Measuring tube sheath-like surrounds. The carrier element is preferably formed as a tube. A closed frame but can do this too be used. As additional Vibrations become the torsional movements of the carrier element used. The carrier element is also so designed and installed that its gravity line longitudinal parallel to the longitudinal axis the measuring tube runs, but not with the longitudinal axis of the multitube coincides. In addition, the torsional rigidity and the moment of inertia of the support element are so dimensioned that the resulting torsional frequency with the bending vibration resonance frequency of Matching tube matches.
An den Enden des Messrohres treten keine Reaktionskräfte auf, wenn die Dichte, die Temperatur und der Druck des Mediums, welches durch das Messrohr des Sensors strömt, solche Werte aufweisen, dass die Resonanzfrequenz des Mehrohres im nicht gekoppelten Zustand gleich der Torsionseigenfrequenz des Trägerelements im nicht gekoppelten Zustand ist. Diese Größe dieser Resonanzfrequenz wird von der Masse des Messrohrs und der Masse des Mediums mitbestimmt. Weichen Dichte, Temperatur und Druck eines Mediums von diesen Werten ab, entspricht auch die Resonanzfrequenz des Messrohrs nicht den geforderten Bedingungen. In diesem Fall muss die Torsionseigenfrequenz des Trägerelements angepasst werden. Durch eine geeignete Dimensionierung des Trägerelements und durch die Wahl des Materials, aus dem es hergestellt wird, kann die Wirkung von Reaktionskräften auf die Aufhängungen des Messrohres ebenfalls verhindert werden. Vorzugsweise werden in diesem Fall die Begrenzungswände des Trägerelements aus einem möglichst leichten Material mit hoher Steifigkeit gefertigt.At the ends of the measuring tube no reaction forces occur when the density, the temperature and the pressure of the medium flowing through the measuring tube of the sensor, have such values that the resonance frequency of the Mehrohres in the non-coupled state equal to the Torsionseigenfrequenz of the support element not coupled state is. This size of this resonant frequency is determined by the mass of the measuring tube and the mass of the medium. If the density, temperature and pressure of a medium deviate from these values, the resonant frequency of the measuring tube does not meet the required conditions. In this In this case, the torsional natural frequency of the carrier element must be adapted. By a suitable dimensioning of the carrier element and by the choice of the material from which it is made, the effect of reaction forces on the suspensions of the measuring tube can also be prevented. Preferably, in this case, the boundary walls of the carrier element are made of the lightest possible material with high rigidity.
Zusätzlich zu den oben genannten Maßnahmen kann das Trägheitsmoment des Trägerelements variabel gehalten werden. Das kann dadurch erreicht werden, dass der Schwerpunkt des Trägerelements mittels einer geeigneten Bewegungsvorrichtung relativ zur Achse des Messrohres bewegt wird. Hierfür werden beispielsweise elektromechanische, elektromagnetische, hydraulische oder pneumatische Stellglieder verwendet. Die Größe der Kräfte, welche auf die Aufhängungen des Messrohres einwirken, kann beispielsweise mit Hilfe von Beschleunigungsaufnehmers erfasst werden. Mit den dabei ermittelten Messwerten lässt sich das Trägheitsmoment des Trägerelements so einstellen, dass die Torsionsresonanzfrequenz des Trägerelements gleich der Biegeresonanzfrequenz des Messrohres ist. Dadurch wird sichergestellt, dass keine Reaktionskräfte mehr auf die Aufhängungen des Messrohres einwirken.In addition to the above measures can the moment of inertia the support element variable being held. This can be achieved by focusing the carrier element by means a suitable moving device relative to the axis of the measuring tube is moved. For this will be For example, electromechanical, electromagnetic, hydraulic or pneumatic actuators used. The size of the forces acting on the suspensions the measuring tube act, for example, by means of accelerometer be recorded. With the measured values determined thereby can be the moment of inertia the carrier element set so that the torsional resonance frequency of the carrier element is equal to the bending resonance frequency of the measuring tube. This will Ensures that no more reaction forces on the suspensions of the measuring tube act.
Der erfindungsgemäße Sensor ist mit einer Erregungsanordnung für das Messrohr ausgerüstet. Diese wird vorzugsweise mittig zwischen den beiden Enden des Messrohres installiert ist. Sie kann beispielsweise aus einem Dauermagneten bestehen, der an dem Messrohr befestigt ist, sowie einer Spulenanordnung, die gegenüber von dem Dauermagneten an der Innenfläche des Trägerelements installiert ist.Of the inventive sensor is equipped with an excitation arrangement for the measuring tube. These is preferably centered between the two ends of the measuring tube is installed. For example, it can be made of a permanent magnet consist, which is attached to the measuring tube, and a coil assembly, the opposite of the permanent magnet is installed on the inner surface of the support member.
Weitere erfinderische Merkmale sind in den abhängigen Ansprüchen gekennzeichnet.Further inventive features are characterized in the dependent claims.
Die Erfindung wird nachfolgend an Hand einer Zeichnung näher erläutert.The The invention will be explained in more detail with reference to a drawing.
Die
einzige zur Beschreibung gehörige
Figur zeigt einen Sensor
Das
Trägerelement
Auf
dem Messrohr
Mit
Hilfe der beiden Messvorrichtungen
Reaktionskräfte treten
an den Enden des Messrohrs
Bei
einem Medium
Das
Trägheitsmoment
des Trägerelements
Die Erfindung beschränkt sich nicht nur auf das hier beschriebene Ausführungsbeispiel. Vielmehr umfasst sie alle Variationen der Vorrichtung und des Verfahrens, die dem Kern der Erfindung zugeordnet werden können.The Restricted invention not only on the embodiment described here. Rather, it includes they all variations of the device and the method that the Core of the invention can be assigned.
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410023600 DE102004023600A1 (en) | 2004-05-13 | 2004-05-13 | Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410023600 DE102004023600A1 (en) | 2004-05-13 | 2004-05-13 | Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004023600A1 true DE102004023600A1 (en) | 2005-12-08 |
Family
ID=35335977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200410023600 Ceased DE102004023600A1 (en) | 2004-05-13 | 2004-05-13 | Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004023600A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005062007A1 (en) * | 2005-12-22 | 2007-06-28 | Endress + Hauser Flowtec Ag | Vibration-type measuring transformer used e.g. as a mass flow measuring device comprises a housing, an inner part arranged in the housing, a curved partially vibrating measuring tube and a counter oscillator |
US7325462B2 (en) | 2005-12-22 | 2008-02-05 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
US7360451B2 (en) | 2005-12-22 | 2008-04-22 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
WO2013165428A1 (en) | 2012-05-03 | 2013-11-07 | Halliburton Energy Services, Inc. | Single magnet fluid densitometer |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4121732A1 (en) * | 1991-07-01 | 1993-01-07 | Rota Yokogawa Gmbh & Co Kg | MEASURING DEVICE FOR DETECTING A MASS FLOW ACCORDING TO THE CORIOLIS PRINCIPLE |
DE19738332A1 (en) * | 1996-09-04 | 1998-03-05 | Fuji Electric Co Ltd | Mass flow rate measuring system with at least one measuring tube |
EP0849568B1 (en) * | 1996-12-11 | 1999-06-02 | Endress + Hauser Flowtec AG | Coriolis massflow/density sensor with a single straight measuring tube |
EP1229310A1 (en) * | 1995-06-14 | 2002-08-07 | Endress + Hauser Flowtec AG | Coriolis mass flowmeter with a single measurement tube |
DE10220827A1 (en) * | 2002-05-08 | 2003-11-20 | Flowtec Ag | Vibration type fluid mass flow rate transducer has a vibration exciter that also imparts a torsional vibration so that shear flow is introduced making measurements insensitive to fluid viscosity or density variations |
DE10235322A1 (en) * | 2002-08-01 | 2004-02-12 | Endress + Hauser Flowtec Ag, Reinach | Vibration or Coriolis fluid mass flowmeter for measurement of mass flow, and or viscosity, has a single straight measurement pipe and an additional vibrator for generation of a torsional vibration and therefore fluid shear forces |
DE10257322A1 (en) * | 2002-12-06 | 2004-06-24 | Endress + Hauser Flowtec Ag, Reinach | Process control meter for use in process control, e.g. for monitoring fluid mass flow rate, density, viscosity or pressure, has temperature compensation that takes into account historical temperature measurement behavior |
-
2004
- 2004-05-13 DE DE200410023600 patent/DE102004023600A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4121732A1 (en) * | 1991-07-01 | 1993-01-07 | Rota Yokogawa Gmbh & Co Kg | MEASURING DEVICE FOR DETECTING A MASS FLOW ACCORDING TO THE CORIOLIS PRINCIPLE |
EP1229310A1 (en) * | 1995-06-14 | 2002-08-07 | Endress + Hauser Flowtec AG | Coriolis mass flowmeter with a single measurement tube |
DE19738332A1 (en) * | 1996-09-04 | 1998-03-05 | Fuji Electric Co Ltd | Mass flow rate measuring system with at least one measuring tube |
EP0849568B1 (en) * | 1996-12-11 | 1999-06-02 | Endress + Hauser Flowtec AG | Coriolis massflow/density sensor with a single straight measuring tube |
DE10220827A1 (en) * | 2002-05-08 | 2003-11-20 | Flowtec Ag | Vibration type fluid mass flow rate transducer has a vibration exciter that also imparts a torsional vibration so that shear flow is introduced making measurements insensitive to fluid viscosity or density variations |
DE10235322A1 (en) * | 2002-08-01 | 2004-02-12 | Endress + Hauser Flowtec Ag, Reinach | Vibration or Coriolis fluid mass flowmeter for measurement of mass flow, and or viscosity, has a single straight measurement pipe and an additional vibrator for generation of a torsional vibration and therefore fluid shear forces |
DE10257322A1 (en) * | 2002-12-06 | 2004-06-24 | Endress + Hauser Flowtec Ag, Reinach | Process control meter for use in process control, e.g. for monitoring fluid mass flow rate, density, viscosity or pressure, has temperature compensation that takes into account historical temperature measurement behavior |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005062007A1 (en) * | 2005-12-22 | 2007-06-28 | Endress + Hauser Flowtec Ag | Vibration-type measuring transformer used e.g. as a mass flow measuring device comprises a housing, an inner part arranged in the housing, a curved partially vibrating measuring tube and a counter oscillator |
US7325462B2 (en) | 2005-12-22 | 2008-02-05 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
US7360451B2 (en) | 2005-12-22 | 2008-04-22 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
WO2013165428A1 (en) | 2012-05-03 | 2013-11-07 | Halliburton Energy Services, Inc. | Single magnet fluid densitometer |
EP2844976A4 (en) * | 2012-05-03 | 2015-10-07 | Halliburton Energy Services Inc | Single magnet fluid densitometer |
EP3064925A1 (en) * | 2012-05-03 | 2016-09-07 | Halliburton Energy Services, Inc. | Single magnet fluid densitometer |
US9645114B2 (en) | 2012-05-03 | 2017-05-09 | Halliburton Energy Services, Inc. | Single magnet fluid densitometer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0316908B1 (en) | Process for the measurement of mass flow rate using the coriolis principle and mass flow rate measuring apparatus using the coriolis principle | |
DE102012016490A1 (en) | Coriolis mass flowmeter | |
EP0849568B1 (en) | Coriolis massflow/density sensor with a single straight measuring tube | |
DE3034246C2 (en) | Vibration damper for a vehicle internal combustion engine | |
EP2304393B1 (en) | Vibration-type transducer | |
EP1229310B1 (en) | Coriolis mass flowmeter with a single measurement tube | |
EP2650656A1 (en) | Coriolis mass flow measuring device | |
WO2018189245A1 (en) | Vibration damping of a wind turbine tower | |
DE3821368A1 (en) | VIBRATION DAMPING AND VIBRATION COMPENSATING BEARING ARRANGEMENT | |
DE102007020050A1 (en) | Device for vibration damping | |
DE102009002941A1 (en) | Method for detecting a blockage in a Coriolis flowmeter | |
DE102011006971A1 (en) | Vibration-type transducers and method of making same | |
DE2343552A1 (en) | ELECTROHYDRAULIC SERVO VALVE | |
WO2007147786A1 (en) | Micromechanical sensor for measuring the mass flow rate in accordance with the coriolis principle | |
EP0855017B1 (en) | Mass flow rate measuring instrument | |
DE2950919A1 (en) | IMPROVEMENTS TO VIBRATION DEVICES FOR THE TREATMENT OF AN OPTICAL BEAM | |
DE102009002942A1 (en) | A method of determining a meter tube tube wall thickness of a Coriolis flowmeter | |
EP2208693B1 (en) | Linear vibration feeder | |
DE102005042677A1 (en) | Coriolis mass flow sensor | |
DE102004023600A1 (en) | Flowing medium`s flow rate and density determining sensor has tube with inlet and outlet openings and connected with supporting component that is used as oscillator, where vibrations of tube are coupled at vibrations of oscillator | |
EP1431719A1 (en) | Coriolis mass flow/density sensor with a single straight measuring conduit | |
DE10138323C1 (en) | Mass flow meter and method for measuring a mass flow | |
DE2403218A1 (en) | VIBRATION DEVICE | |
DE1938208A1 (en) | Spring-mass system of variable resonance frequency | |
DE2701580A1 (en) | Pressure valve with conical plug - has taper bore from inlet with max. dia. at face towards plug |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: ABB TECHNOLOGY AG, ZUERICH, CH |
|
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |
Effective date: 20111105 |