WO2010057480A2 - Procédé et dispositif de mesure de courants de fluide - Google Patents

Procédé et dispositif de mesure de courants de fluide Download PDF

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Publication number
WO2010057480A2
WO2010057480A2 PCT/DE2009/001642 DE2009001642W WO2010057480A2 WO 2010057480 A2 WO2010057480 A2 WO 2010057480A2 DE 2009001642 W DE2009001642 W DE 2009001642W WO 2010057480 A2 WO2010057480 A2 WO 2010057480A2
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WO
WIPO (PCT)
Prior art keywords
fluid
flow
ultrasonic
determining
ultrasound
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
Application number
PCT/DE2009/001642
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German (de)
English (en)
Other versions
WO2010057480A3 (fr
WO2010057480A9 (fr
Inventor
Udo Steppe
Andreas Dahlke
Michael Teufel
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.)
NIVUS GmbH
Original Assignee
NIVUS GmbH
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 NIVUS GmbH filed Critical NIVUS GmbH
Priority to DE112009003438T priority Critical patent/DE112009003438A5/de
Publication of WO2010057480A2 publication Critical patent/WO2010057480A2/fr
Publication of WO2010057480A3 publication Critical patent/WO2010057480A3/fr
Publication of WO2010057480A9 publication Critical patent/WO2010057480A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/663—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift
    • 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
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/7082—Measuring the time taken to traverse a fixed distance using acoustic detecting arrangements
    • 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
    • G01P5/24—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/241—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave by using reflection of acoustical waves, i.e. Doppler-effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S15/582—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse-modulated waves and based upon the Doppler effect resulting from movement of targets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/521—Constructional features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • 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
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/712—Measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means

Definitions

  • the present invention relates to the determination of fluid flows.
  • DE 197 40 549 A1 describes a method for measuring the flow characteristic of a medium in open channels, in which ultrasound pulses are radiated into a fluid and received from the latter, whereby the desired flow characteristics are determined by cross-correlations.
  • Other documents dealing with flow measurements for example, DE 40 16 529 Cl, which relates to a flow meter for open channels, DE 195 42 232 Al, which relates to an ultrasonic flowmeter liquid or gaseous media, DE 44 43 483 Al, the DE 40 27 030 Al, which relates to a method and an apparatus for measuring the flow rate, DE 33 14 260 Al, which is a device for measuring the per unit time by a
  • DE 32 23 393 A1 which relates to a method and apparatus for determining the flow rate in liquids
  • FR 2 710 979 A1 which relates to an arrangement for measuring flow at fluctuating water levels
  • GB No. 2,029,030 A1 which relates to a fluid flow meter
  • US Pat. No. 5,821,427 which relates to a fluid velocity measuring arrangement using curve adaptation of peak speed detection
  • US Pat. No. 5,315,880 relating to a method for measuring a fluid velocity by determining the Doppler frequency shift of microwave signals.
  • An open trench flow meter is known from JP 57101720 A
  • an apparatus for measuring physical quantities of a liquid with two ultrasonic wave transducers is known from DE 2 703 439 B2
  • a method or apparatus for determining the flow volume in a duct is omitted
  • DE 198 57 572 Al known
  • DE 196 50 621 Al relates to a measuring device for detecting the flow rate.
  • DE 196 49 931 A1 relates to a device and a method for measuring a flow rate.
  • a device for radioacoustic remote measurement of at least two components of a flow velocity vector is known.
  • This technique is known as RASS, radioacoustic probing system.
  • the sound waves are to be generated by means of an array.
  • the measurement of fluid flows should also be possible for a less experienced user; it should be accurate, especially when the fluid is flowing over varying amounts of sediment or the like, and / or the ultrasonic sensors are subject to fluctuations in position due to turbulence, waves or the like, etc. It would be desirable to provide at least some of these problems with at least partial relief ,
  • the object of the invention is to provide new products for commercial use.
  • the present invention thus proposes, in a first basic idea, a method for determining fluid flows in which ultrasound pulses are radiated into the fluid and a fluid flow is detected on the basis of the impulse responses. It is preferred that the irradiation direction is changed by means of an ultrasound phase array and the fluid flow is detected by impulse responses from different directions.
  • turbulence is determined by the determination of velocity fields or turbulence models are used in the determination of the total flow can.
  • Such turbulence models need not necessarily use general assumptions such as the compelling, complete correctness of the Navier-Stokes equations due to practical deviations. This makes it possible to perform fast, accurate measurements thanks to cross-correlation determinations.
  • the direction of irradiation of the ultrasound pulses can be changed very quickly by the use of ultrasound phase arrays without mechanical adjustment and therefore in particular. This allows significantly improved measurements.
  • the movement of the ultrasonic sensor can be detected, for example by means of a separate acceleration sensor, in order then to compensate for the detected movement and thus to allow a measurement in always the same direction.
  • the assembly is usable with a variety of different fluids.
  • the fluid may be a gas or gas mixture, in particular natural gas and / or methane, and / or a liquid, in particular water and / or aqueous solutions and / or suspensions, in particular pure water, drinking water, waste water; however, it is also possible to measure chemicals, for example industrial process chemicals. Since it is possible to measure in different directions, as a result of which the accuracy is increased, a measurement can take place, in particular despite the presence of turbulences. Fluid flows can be detected according to the invention in a variety of different conditions and applications. However, the measurement in open waters, open channels, pipelines and in particular pressure lines will be particularly relevant.
  • the distance in which ambient fluid flows are readily measurable as the respective ultrasonic phased array will depend on the ultrasound pulse power, the quality of the electronics used in ultrasonic array excitation and pulse evaluation, and so on. If the fluid flow is determined at a distance of three to five, preferably a maximum of ten meters, this is sufficient for a large number of applications and does not require much equipment. This is particularly advantageous for measurements on open channels on the mainland.
  • the ultrasound pulses will typically be injected into the fluid at a frequency of over 200 kHz and below 4,000 kHz, preferably around 1,000 kHz with a bandwidth of +200 - 500 kHz. These frequencies can be generated easily.
  • the preferred frequency range also makes it possible to change the frequencies that are radiated into the fluid. This is advantageous because it is preferred if the ultrasound pulses are radiated into the fluid at frequencies varying over time, in particular with a frequency deviation of more than a few hundred kHz, preferably around 400 to 1000 kHz, assuming sufficiently high fundamental frequencies. In this case, the ultrasonic pulse frequencies can be changed abruptly and / or chirpedly. This brings significant advantages in the evaluation.
  • the emission direction in phase arrays depends on the frequency of the emitted pulses.
  • the emission lobe will thus migrate and can be compensated for, either by adjusting, ie changing, the phase position of different elements of the ultrasonic phase array during tuning / or, by taking into account in the evaluation that the pulse signal responses come from changing directions, since the dependence of the emission direction on the emission frequency for a given ultrasound phase array is readily determinable, the compensation is problem-free, that is to say in particular without a complicated intervention
  • chirped tuning is possible both continuously and in small, in particular quasi-continuous steps.
  • the direction of irradiation is preferably changed abruptly. This is preferred over a gradual sweep of a region.
  • it is not necessary to scan two directions lying next to one another, but instead it is possible to scan directions which differ more from one another. This is advantageous because in this way adjacent directions are scanned at different times, which on the one hand allows better compensation for sensor movements and Ensures an improved measurement even with turbulence in the flow.
  • An ultrasonic phase array has a plurality of linearly or, preferably, two-dimensionally arranged ultrasound emitting and / or receiving elements. It is preferred if all elements of the ultrasonic phase array are amplified as equally as possible. It is not necessary that when amplifying the received signals all the elements of the ultrasonic phase array equal gain factors are assigned, but that the gain of the individual Elements are selected so that all elements produce the same output under otherwise identical conditions. This is advantageous, for example, for digitizing the signals in order to be able to carry out a signal evaluation while carrying out cross-correlation.
  • the ultrasonic phase array may be one-dimensional, that is, a line array is usable; in such a case, a fan-like sweep of a layer can take place.
  • a second line array which is, for example, designed to be complementary, velocity vectors can be determined in the entire flow cross section.
  • two-dimensional arrays of ultrasound transmitters / receivers will be used.
  • flow patterns can be detected three-dimensionally without mechanical movement of the sensor field and thus particularly well determine turbulence, etc.
  • evaluation windows taking into account determined turbulences and / or flow profiles. This makes it possible to reduce the evaluation windows in the course of a continuous measurement and thus to increase the evaluation time and the repetition frequency or sampling rate. It should be mentioned that the evaluation windows can not only be reduced automatically, but can also be enlarged in the same way. It is possible to detect the signal background and to take it into account in the signal evaluation. For this purpose, for example, a measurement without prior emission of ultrasonic signals. The signals obtained thereby represent a background to be subtracted, for example, by means of which the measurement accuracy can be further increased.
  • the impulse responses or the flow data determined during their analysis can be used to determine fixed marks and / or to determine the position of the ultrasound phase array. So the location of sediments will not change in the short term. If, for example, a sensor floating on the surface of a fluid rocks, it will lead to a supposed movement of the sediments; but since such will not occur, it can be concluded that the sensor has moved, which can be compensated.
  • the high measuring rate with which it is possible to scan in different directions, advantageously allows comparatively fast movements to be detected.
  • an accelerometer or the like can also be integrated into the sensor or its housing in order to avoid loading. compensate for movements of the same.
  • the integration can be done for example by installation on a carrier board or the like or done by integration on one and the same chip.
  • a fluid flow measuring arrangement in particular for the implementation according to one of the previously described methods with an ultrasound pulse transmitting / receiving means for transmitting ultrasound pulses in fluids and for receiving ultrasonic pulse responses from the fluid and an evaluation means for Determination of fluid flows for the evaluation of the ultrasonic impulse responses.
  • the ultrasound pulse transmitting / receiving means is designed as a two-dimensional ultrasound array and the evaluation means for evaluating impulse responses from different directions.
  • the ultrasonic pulse transmitting means will typically be a multi-dimensional ultrasonic phase array.
  • FIG. 1 shows a measuring arrangement of the present invention during a measurement.
  • a fluid flow measuring assembly generally designated 1, includes ultrasonic pulse transmitting / receiving means 2 for transmitting ultrasonic pulses 3 in fluids 4 and for receiving ultrasonic pulse responses from the fluid and an evaluation means 5 for determining
  • the fluid flow measuring arrangement 1 is used for measuring quantities of fluid which flow through a fluid bed.
  • the fluid flow meter assembly is adapted to be used with a plurality of fluid beds; in the figures, the bed of an open channel in which the sensor of the fluid flow measuring arrangement 1 floats is shown as fluid bed 4a.
  • the fluid flow measuring arrangement for this purpose comprises for the ultrasonic pulse transmitting / receiving means 2 a suitable, fluid-tight housing and a connection leading away therefrom. Although this connection may be wireless if desired; in such a case, the sensor housing will be provided with a suitable power supply. It should be noted that an evaluation or preliminary evaluation at the ultrasonic pulse transmitting / receiving means 2 is preferred and this can form together with corresponding circuits, etc., a co-enveloped sensor, whereby, if necessary, only one
  • Transmission of fluid flow data for example, as a total flow data is required. If desired, it is also possible for the data to be recorded and a reading to be made after completion of a measurement and connection to a suitable interface.
  • the senor in its fluid-tight housing comprises only one signal conditioning 7, for example a gain of the signals received with the individual ultrasound phase array elements, a linking stage and a digitization and then the digitized data for one further evaluation fed via a multicore conductor 8 to a sufficiently powerful central processing unit, which serves as evaluation means 5, in which the data are linked together in order to obtain fluid flow-indicative values from the (digitized) impulse responses received from the different directions determine.
  • the driving of the sensor can be prevented.
  • the driving of the sensor can then be prevented, for example, with the power / voltage supply.
  • the ultrasound pulse transmitting / receiving means 2 for transmitting ultrasound pulses 3 in the present case is designed as a two-dimensional array of ultrasound emitting and receiving elements.
  • a frequency generator (not shown) which generates an adjustable ultrasonic frequency, for example between 800 and 1200 kHz in the illustrated embodiment.
  • the frequency generator permits the change, and thus also the tunability, of the frequency generated during the pulse, that is to say it chirps by a frequency which can be predetermined by a controller.
  • Each element of the array is connected to the frequency generator via a programmable phase shifter (not shown) and an amplifier.
  • Phase shifters are programmable by a controller (not shown) with which the relative phase angle of two elements relative to one another can be set so precisely that when the ultrasound waves emitted from all elements are superimposed, an emission in the liquid results in a desired direction.
  • a controller not shown
  • the radiated frequency changes - and constant setting of the phase shifter will change the direction of the irradiation of ultrasonic pulses. This change in direction will generally be small, and since the corresponding chirp frequency directional relationship is known or determinable for a given array, it can be compensated for.
  • the amplification of the ultrasonic frequency generated by the generator is sufficient to excite the individual elements so strongly that a sufficiently strong ultrasonic pulse is emitted into the fluid.
  • the ultrasound pulses 3 pass through the fluid 4. In this case, they are subject to absorption by the fluid and the particles 9 therein, as well as to a Doppler shift. From the emitted ultrasound pulses, ultrasonic impulse responses are returned to the sensor, where they are received by the elements of the ultrasound phase array.
  • the fluids 4 are in the illustrated embodiment effluents in open channels, here for example in sewage treatment plants, where they are fed through the open channels clarifier.
  • the evaluation means 5 comprises a computer for evaluating the impulse responses received from the sensor and conditioned there.
  • the evaluation means 5 is designed to determine the flow velocity in volumes which lie along the respectively illuminated direction; it is further designed to conclude, based on the determined flow velocities of volumes, on the presence of turbulences in the detected fluid volume, evaluation windows taking into account to adjust the instantaneous or typically present turbulence and to determine the total flow through a cross-section of the fluid bed by integrating the flow rate over the individual volumes.
  • the evaluation means is designed to take into account the presence of sediments, that is, a zero-flow, high-reflectance, zero-flow area without the need to provide information about the fluid bed geometry.
  • the controller in the sensor is designed to effect an emission in different directions 6 by appropriate settings of the phase shifter and to receive 6 impulse responses from these directions.
  • the directions do not change as per se also possible by fan-like sweeping, but spaced points are illuminated on a plane, as shown in Figure 1 on the basis of the respective main axis of the successively emitted ultrasonic beam lobes characterizing lines 6a - see 6f; that the control is designed so that all points of a given projection surface 10 are illuminated gradually, will be obvious.
  • the fluid-tight and buoyant coated sensor is spent in the fluid, which can be done by inserting the sensor already connected to the evaluation. Due to the evaluation line, the sensor is prevented from driving off at the same time. Then the control is activated and chirping pulses are generated in the frequency generator. At the same time, the phase shifters assigned to the individual elements are adjusted such that a first emission direction results for a center frequency. The pulse generation is continued for a certain duration - the pulse duration - and during this time the elements of the ultrasonic phase array are subjected to ultrasound power, the frequency of the ultrasonic waves being determined by the respective frequency at the frequency generator and the relative phase position relative to one another by the phase shifters. that emission (for a given center frequency) results in a desired direction, for example 6a.
  • the pulse duration of the frequency generator After expiration of the pulse duration of the frequency generator is then turned off and the power application of the elements terminated. At the same time, the signal which is now present at the elements is started to be conditioned, ie amplified and digitized, as an impulse response signal. The digitized signal is then transmitted to the evaluation means with further information, for example regarding the respectively illuminated direction.
  • phase shifters After expiration of an impulse response time, a new phase adjustment is made to the phase shifters and ultrasound irradiation in another direction, for example 6b, is performed as previously described.
  • the other direction is chosen so that different points are illuminated on a projection surface around the sensor, but it is possible to determine differential speeds from the volumes IIa, IIb lying in different directions 6a, 6b. In this way, all directions that are to be achieved with the sensor are scanned step by step.
  • scanning is carried out regularly in different directions 6c to 6f without pulses having previously been emitted. This makes it possible to subtract the signal background, which is caused, for example, by the inherent noise of elements and the signal conditioning electronics.
  • a separate signal background can be determined for each direction, allowing for best fit, but reducing the sampling rate because of the increased time for signal background measurements.
  • directional stability that is, at least largely isotropic background, but at the same time strong temporal variability, it will be preferable to consider the signal background globally, but to record it frequently.
  • the background behavior may in turn be influenced by a large number of factors, such as possible temperature fluctuations of the fluid, interference, etc. That the background consideration can be changed during the course of a measurement, for example because the background stabilizes over time, but changes in direction instead occur, should be mentioned.
  • flow velocities for given volumes are then determined in per se known manner in the evaluation unit taking into account the possibly weighted direction-interpolated signal background. It can be concluded on the basis of those volumes which have a zero flow velocity and are particularly far from the sensor, on the presence of deposits, that is, sediments and the like. From the position of a surface, which is spanned by these volumes, it can then be deduced whether the sensor has moved or not. In this case, a possible swinging motion can be compensated for at a sufficiently high sampling rate by carrying out a rotation transformation around the sensor in such a way that a constant, typical average position of the sediment surface results. It is worth mentioning that a fluid bed wall can be used as a fix flat in the absence of sediments. Likewise, other transformations may be mentioned in order to compensate, for example, for translational movements about a central position.
  • a flow pattern can be established and the total flow through a cross section of the fluidized bed can be determined.
  • differential speeds of different volumes and thus velocity vectors in the liquid can also be determined.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Fluid Mechanics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un procédé de mesure de courants de fluide selon lequel des impulsions ultrasoniques sont émises dans le fluide dans des directions changeantes au moyen d'une unité ultrasonique à commande de phase et les réponses aux impulsions provenant de différentes directions sont évaluées pour déterminer un courant de fluide. Il est prévu qu'à partir des impulsions ultrasoniques, en tenant compte de la section transversale du lit de fluide guidant un liquide et en tenant compte de la paroi du lit de fluide et/ou de la présence ou de l'absence de sédiments, le débit total passant par cette section transversale soit déterminé par corrélation croisée à partir des vitesses de courant pour des volumes donnés se trouvant dans différentes directions.
PCT/DE2009/001642 2008-11-20 2009-11-20 Procédé et dispositif de mesure de courants de fluide Ceased WO2010057480A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112009003438T DE112009003438A5 (de) 2008-11-20 2009-11-20 Verfahren und Vorrichtung zur Fluidströmungsmessung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008058376A DE102008058376A1 (de) 2008-11-20 2008-11-20 Verfahren und Vorrichtung zur Fluidströmungsmessung
DE102008058376.6 2008-11-20

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WO2010057480A2 true WO2010057480A2 (fr) 2010-05-27
WO2010057480A3 WO2010057480A3 (fr) 2010-07-15
WO2010057480A9 WO2010057480A9 (fr) 2011-01-13

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DE102015106695A1 (de) 2015-04-29 2016-11-03 Manuel Haide Verfahren und Vorrichtung zur Durchflussmessung
CN106323387A (zh) * 2016-08-05 2017-01-11 山东大学 一种快速测量过水断面流量的多功能测量装置及方法
US10161770B2 (en) 2016-06-30 2018-12-25 Ott Hydromet Gmbh Flow meter with adaptable beam characteristics
US10295385B2 (en) 2016-06-30 2019-05-21 Hach Company Flow meter with adaptable beam characteristics
US10408648B2 (en) 2016-06-30 2019-09-10 Hach Company Flow meter with adaptable beam characteristics
DE102018006084B3 (de) * 2018-08-02 2020-01-30 Nivus Gmbh Messverfahren und Messanordnung zur Messung der Partikelgrößenverteilung und Partikelkonzentration in einer liquiddurchflossenen Leitung
CN112362120A (zh) * 2020-11-12 2021-02-12 中北大学 流量检测器及流量检测方法
CN113701830A (zh) * 2021-08-31 2021-11-26 武汉新烽光电股份有限公司 一种排水管网流量测量装置及方法
DE102021118821A1 (de) 2021-07-21 2023-01-26 Krohne Messtechnik Gmbh Ultraschalldurchflussmessgerät und Verfahren zum Betreiben eines Ultraschalldurchflussmessgeräts
CN116576926A (zh) * 2023-07-13 2023-08-11 陕西瀚泰水利水电勘测设计有限公司 一种灌溉末级渠道流量测量装置

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DE102021118821A1 (de) 2021-07-21 2023-01-26 Krohne Messtechnik Gmbh Ultraschalldurchflussmessgerät und Verfahren zum Betreiben eines Ultraschalldurchflussmessgeräts
CN113701830A (zh) * 2021-08-31 2021-11-26 武汉新烽光电股份有限公司 一种排水管网流量测量装置及方法
CN113701830B (zh) * 2021-08-31 2023-05-30 武汉新烽光电股份有限公司 一种排水管网流量测量装置及方法
CN116576926A (zh) * 2023-07-13 2023-08-11 陕西瀚泰水利水电勘测设计有限公司 一种灌溉末级渠道流量测量装置
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