EP3066479A1 - Procédé et dispositif pour déterminer la vitesse d'un milieu - Google Patents

Procédé et dispositif pour déterminer la vitesse d'un milieu

Info

Publication number
EP3066479A1
EP3066479A1 EP14793144.8A EP14793144A EP3066479A1 EP 3066479 A1 EP3066479 A1 EP 3066479A1 EP 14793144 A EP14793144 A EP 14793144A EP 3066479 A1 EP3066479 A1 EP 3066479A1
Authority
EP
European Patent Office
Prior art keywords
medium
signals
determined
vortex
interrogation
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.)
Withdrawn
Application number
EP14793144.8A
Other languages
German (de)
English (en)
Inventor
Christoph Baer
Thomas Musch
Stephan Neuburger
Michael Vogt
Timo JAESCHKE
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.)
Krohne Messtechnik GmbH and Co KG
Original Assignee
Krohne Messtechnik GmbH and Co KG
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 Krohne Messtechnik GmbH and Co KG filed Critical Krohne Messtechnik GmbH and Co KG
Publication of EP3066479A1 publication Critical patent/EP3066479A1/fr
Withdrawn legal-status Critical Current

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
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/3209—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the 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
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • 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
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/325—Means for detecting quantities used as proxy variables for swirl
    • G01F1/3282—Means for detecting quantities used as proxy variables for swirl for detecting variations in infrasonic, sonic or ultrasonic waves, due to modulation by passing through the swirling fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
    • G01P5/22—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means

Definitions

  • the phase between a response signal and the associated interrogation signal, which is received as a response signal is determined.
  • the interrogation signal is radiated only after the generation of the at least one vortex in order to determine the current speed of the medium.
  • the speed of the medium is then determined.
  • it may also be used for stored data, value pairs, formulas or algorithms.
  • the standard deviation of the phase change is particularly a measure of the strength of the vortex occurring, the temporal variations of the determined and caused by the vortex in the flowing medium phase changes on the occurrence and detachment of the vortex at the point at which the vortex -. B. by a narrowing of the line or by a rough place, etc. - are generated. From both variables can be closed by means of a suitable modeling on the average flow velocity.
  • the standard deviation serves as a measure of the speed of the vortex and above as a measure of the speed of the medium itself.
  • the interrogation signals are preferably modulated in such a way that the signals-in particular after reflection at a reflector-that are present in the receiving device and received as a response signal permit, in particular, the following conclusions:
  • different reflection points should be separable from one another. This allows separation of the reflection containing the medium's indirect velocity information from possibly moving spurious reflections (for example, vibrating windows in the conduit).
  • the distance optical as precise phase information
  • the amplitude should be known.
  • the type of modulation should allow for rapid measurement and collection of amplitude and distance information over time.
  • the modulation should allow Doppler-variant measurements.
  • Modulations suitable for this purpose are, for example, FMCW radar (modulated continuous wave radar) or LFM-FSK (a combination of LFMCW, ie linear frequency-modulated FMCW, and FSK modulation as frequency-shift keying).
  • FMCW radar modulated continuous wave radar
  • LFM-FSK a combination of LFMCW, ie linear frequency-modulated FMCW, and FSK modulation as frequency-shift keying
  • the device also serves to implement the above method for determining the velocity of the medium.
  • FIG. 1 schematically shows a device 1 for measuring the speed of a compressible medium (not shown here).
  • the medium is doing in a line 2 - z.
  • B. a pipe - out and moves - indicated by the arrow - in the illustrated embodiment from bottom to top.
  • a vortex generator device 3 is present, which is a constriction of the diameter of the line 2 acts, are generated by the vortex in the medium.
  • the constriction is executed rotationally symmetrical in the illustrated embodiment as a complete constriction of the cross section of the line 2.
  • the effective permittivity is determined, wherein the permittivity of the flowing medium is inhomogeneous and dependent on whether the vortex and its pressure fluctuations, whether it is an area with or without vortex.
  • the interrogation signals are irradiated in the direction of a reflector device 6 into the medium, which reflects the electromagnetic signals again in the direction of the receiving device 5.
  • a reflector device 6 into the medium, which reflects the electromagnetic signals again in the direction of the receiving device 5.
  • the transmitter 4, receiver 5 and reflector device 6 can also be described as components of a radar barrier which pass through the medium and in particular the vortices in the medium.
  • the transmitting and receiving devices 5 are further connected to an evaluation device 7, which in particular serves the evaluation of the response signals received by the receiving device 5.
  • the method for speed measurement in a medium that is at least partially gaseous - z. B. in the form of a gas-dust mixture with solid particles as inclusions - is that the - provided by a vortex image device 3 - with vortex medium at least one radar barrier, which is here by transmitting 4, receiving 5 and reflector device 6 is generated , happens.
  • the measurement of the irradiation and reception of the electromagnetic signals is preferably clocked very fast, which is possible in particular by the use of correspondingly high-frequency signals as interrogation signals.
  • the evaluation device 7 evaluates the response signals from both receiving devices 5 in conjunction with the data memory 8.
  • the measurement setup also permits an evaluation of the response signals by a cross-correlation and an evaluation of the corresponding correlation coefficients.
  • dielectric window is inserted into the wall of the line 2.
  • the windows are optimally realized in such a way that within the flowing medium, a collimated antenna beam with a known directional characteristic is generated.
  • the windows in the antenna beam are positioned in such a way that multiple reflections do not overlap with the main reflection as far as possible, and the greatest possible signal-to-noise ratio is achieved for the reference reflection.

Landscapes

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

Abstract

L'invention concerne un procédé pour déterminer la vitesse d'un milieu en écoulement. L'invention a pour but un procédé pour la détermination de la vitesse d'un milieu en écoulement qui permet d'obtenir une précision de mesure extrêmement élevée, sans exiger une construction de mesure coûteuse. Ce but est atteint dans le procédé en question, par le fait que l'on produit un tourbillon dans le milieu et que l'on injecte un signal électromagnétique dans le milieu. Ensuite, à partir du signal électromagnétique reçu, on obtient une mesure de la permittivité du milieu et, de ce fait, de la vitesse du milieu. L'invention concerne en outre un dispositif (1) pour la détermination de la vitesse d'un milieu.
EP14793144.8A 2013-11-04 2014-11-04 Procédé et dispositif pour déterminer la vitesse d'un milieu Withdrawn EP3066479A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310018386 DE102013018386A1 (de) 2013-11-04 2013-11-04 Verfahren und Vorrichtung zur Bestimmung der Geschwindigkeit eines Mediums
PCT/EP2014/073695 WO2015063323A1 (fr) 2013-11-04 2014-11-04 Procédé et dispositif pour déterminer la vitesse d'un milieu

Publications (1)

Publication Number Publication Date
EP3066479A1 true EP3066479A1 (fr) 2016-09-14

Family

ID=51846681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14793144.8A Withdrawn EP3066479A1 (fr) 2013-11-04 2014-11-04 Procédé et dispositif pour déterminer la vitesse d'un milieu

Country Status (4)

Country Link
US (1) US9778082B2 (fr)
EP (1) EP3066479A1 (fr)
DE (1) DE102013018386A1 (fr)
WO (1) WO2015063323A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013015685A1 (de) 2013-09-23 2015-03-26 Man Diesel & Turbo Se Werkzeugmaschine
CN106990261A (zh) * 2017-03-10 2017-07-28 西北工业大学 一种荧光风相仪
CN109946478A (zh) * 2019-03-24 2019-06-28 北京工业大学 一种针对空气静压主轴内部气体流速的检测系统
DE102019133608A1 (de) 2019-12-09 2021-06-10 Ruhr-Universität Bochum, Körperschaft des öffentliches Rechts Berührungslose Ermittlung eines ein Plasma charakterisierenden Plasmaparameters
CN111829601B (zh) * 2020-07-21 2022-03-18 中国人民解放军国防科技大学 流体的多状态参数同步测量方法及装置、电子设备和介质
US11885653B2 (en) 2021-09-24 2024-01-30 Hydro Radar, LLC Flow and level monitoring fluid system including nadir-facing and angle flow sensors with MIMO phase radar sensors

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GB1541419A (en) * 1976-04-13 1979-02-28 Spillers Ltd Devices for measuring flow rate of particulate material
DE3504622A1 (de) 1985-02-11 1986-08-14 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Anordnung zur beruehrungslosen messung der geschwindigkeit eines bewegten mediums
US5121658A (en) * 1988-06-20 1992-06-16 Lew Hyok S Mass-volume flowmeter
DE4444248A1 (de) 1994-12-13 1996-06-20 Conrads Hans Georg Dipl Ing Vorrichtung zur berührungsfreien Messung des Massedurchsatzes in Förderleitungen bei Zweiphasenströmungen mit Hilfe von Mikrowellen
DE102006052637B4 (de) * 2006-11-08 2009-02-26 Technische Universität Darmstadt Vorrichtung und Verfahren zur Bestimmung zumindest eines Parameters eines Mediums
US7712380B2 (en) 2007-04-26 2010-05-11 Schlumberger Technology Corporation Waveguide doppler flowmeter
US8028588B2 (en) * 2009-09-25 2011-10-04 Rosemount Inc. Flow measurement using near field microwaves
JP5523908B2 (ja) 2010-04-13 2014-06-18 三菱重工業株式会社 流量測定装置及び流速測定装置
DE102011102991B4 (de) 2011-05-24 2014-02-13 Krohne Messtechnik Gmbh Vorrichtung zur Bestimmung des Volumenanteils wenigstens einer Komponente eines mehrphasigen Mediums
EP2557401A1 (fr) * 2011-08-09 2013-02-13 Hach Corporation Traitement d'ensemble de cibles dans un instrument de vitesse de fluide afin de réduire le bruit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015063323A1 *

Also Published As

Publication number Publication date
DE102013018386A1 (de) 2015-05-07
US20160273946A1 (en) 2016-09-22
WO2015063323A1 (fr) 2015-05-07
US9778082B2 (en) 2017-10-03

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