EP4396540A1 - Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure - Google Patents

Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure

Info

Publication number
EP4396540A1
EP4396540A1 EP22762077.0A EP22762077A EP4396540A1 EP 4396540 A1 EP4396540 A1 EP 4396540A1 EP 22762077 A EP22762077 A EP 22762077A EP 4396540 A1 EP4396540 A1 EP 4396540A1
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
heating element
measuring point
sensor
medium
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.)
Pending
Application number
EP22762077.0A
Other languages
German (de)
English (en)
Inventor
Ralf Emanuel BERNHARDSGRÜTTER
Jürgen DORSCH
Christoph Hepp
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.)
Innovative Sensor Technology IST AG
Original Assignee
Innovative Sensor Technology IST 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 Innovative Sensor Technology IST AG filed Critical Innovative Sensor Technology IST AG
Publication of EP4396540A1 publication Critical patent/EP4396540A1/fr
Pending 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
    • G01F1/68—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 thermal effects
    • 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
    • G01F1/68—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 thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • 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
    • G01F1/68—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 thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/6888—Thermoelectric elements, e.g. thermocouples, thermopiles
    • 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
    • G01F1/7044—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 using thermal tracers
    • 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
    • G01F1/7084—Measuring the time taken to traverse a fixed distance using thermal detecting arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid

Definitions

  • the invention relates to a method for detecting bubbles or droplets of a first medium in a fluid second medium flowing through a measuring tube, a first heating element being arranged on the measuring tube at a first measuring point, a second heating element being arranged on the measuring tube at a second measuring point, wherein the second measuring point is arranged at a distance from the first measuring point in the direction of flow. Furthermore, the invention relates to a sensor arrangement for carrying out the method according to the invention.
  • Thermal flow sensors are known for determining a flow rate or the flow rate of a measurement medium or a fluid, for example a gas, gas mixture or a liquid. These use the fact that a (flowing) measuring medium transports heat away from a heated surface.
  • Thermal flow sensors typically consist of several functional elements, usually at least a low-impedance heating element and a high-impedance resistance element, which serves as a temperature sensor. Alternatively, thermal flow sensors are constructed with several low-impedance heating elements as heaters and temperature sensors.
  • Calorimetric thermal flow sensors determine the flow or the flow rate of the fluid in a channel via a temperature difference between two temperature sensors, which are arranged downstream and upstream of a heating element. For this purpose, use is made of the fact that the temperature difference is linear to the flow or the flow rate up to a certain point. This process or method is extensively described in the relevant literature.
  • the heating element With the "Constant-Current Anemometry" (CCA) control mode, the heating element is subjected to a constant current.
  • the flow of the measuring medium changes the resistance of the Heating element and thus the voltage drop across the heating element, which represents the measurement signal.
  • CVA Constant-Voltage Anemometry
  • a bubble is a gaseous body (first medium) within a liquid (second medium).
  • a droplet is a liquid body (first medium) within a liquid (first medium) or a gas (second medium).
  • the ambient temperature of the measuring point is that temperature which is directly in the area adjacent to the respective temperature sensor. This is essentially determined by the first or second medium.
  • a time between a change in the first measured variable and a corresponding change in the second measured variable is recorded, with a flow rate of the bubble being determined on the basis of the recorded time and a known distance between the first measuring point and the second measuring point or of the droplet and/or the direction of flow of the fluid second medium or of the bubble or the droplet is determined.
  • the flow speed of the fluid second medium can be derived from the flow speed of the bubble or the droplet. Since the measured variables do not change simultaneously, but depend on the point in time at which the bubble or droplet passed, it can be determined which measuring point the bubble or droplet passed first. The direction of flow of the fluid second medium, or of the bubble or of the droplet, can be derived from this.
  • the sensor arrangement comprises a measuring tube, a first heating element, a second heating element, a first temperature sensor, a second temperature sensor and a control/evaluation unit, the control/evaluation unit being designed to use the first heating element, the second heating element, to control the first temperature sensor and the second temperature sensor in such a way that the method according to the invention is carried out.
  • a thermal flow sensor that has the required components can be used.
  • heating elements and the temperature sensors are separate elements
  • heating elements can also be used which have a material with a temperature coefficient of 0 ppm/K, which satisfies the temperature dependency of the separate temperature sensors.
  • thermocouples are thermocouples.
  • An advantageous embodiment of the sensor arrangement according to the invention provides that the first temperature sensor and the second temperature sensor are arranged in a bridge circuit, with the first temperature sensor being connected in series with a first resistor and with the second temperature sensor being connected in series with a second resistor, with the first Resistor and the second resistor are identical.
  • the measuring points can also be designed differently - for example, the first measuring point (and the corresponding first heating element and/or the corresponding first temperature sensor) can be located outside of the measuring tube, while the second measuring point (and the corresponding second heating element and/or the corresponding second temperature sensor) is located inside the measuring tube, and vice versa.
  • a metallic measuring tube MR for example made of chromium steel, through which a fluid second medium MD2, for example water, flows in the direction of flow FR.
  • a first temperature sensor TS1 is fitted on the outer wall of the measuring tube MR at a first measuring point MS1 and a second temperature sensor TS2 is fitted at a second measuring point MS2.
  • the temperature sensors TS1, TS2 are two platinum elements (for example PT50), which are applied to a substrate using thin-film technology. As an alternative to platinum elements, thermocouples could also be used.
  • the temperature sensors TS1, TS2 and the heating elements HZ1, HZ2 are individual elements, that is to say are attached separately from one another at the position of the respective measuring points MS1, MS2.
  • FIG. 1b shows an alternative structure of the sensor arrangement according to the invention.
  • the heating elements HZ1, HZ, or the temperature sensors TS1, TS2 are designed as rods or ceramic plates, possibly surrounded by a protective cover (Thermowell) and attached and contacted inside the measuring tube MR the second medium MD2 immediately.
  • a high sensitivity is achieved in this exemplary embodiment.
  • the disadvantage is that the temperature sensors TS1, TS2 or the heating elements HZ1, HZ2 could be damaged by contact with the second medium MD2 and/or could influence the flow of the second medium MD2, for example by generating turbulence.
  • An electrical resistor R1, R2 is connected upstream of each of the heating elements/temperature sensors, resulting in a full bridge.
  • a supply voltage U_VS is applied, the heating elements HZ1, HZ2 emit heat to the respective immediate surroundings of the first measuring point MS1 and the second measuring point MS2 by being supplied with electrical current.
  • other types of circuit measurements can also be used, for example half bridges or digital detection of the two physical measured variables.
  • the voltage U1 which is present in the voltage divider between the resistor R1 and the first temperature sensor TS1 and the voltage U2, which is present in the voltage divider between the resistor R1 and the first temperature sensor TS1 are recorded as electrical measured variables .
  • the heat emitted by the heating elements HZ1, HZ2 is dissipated differently depending on the nature of the second medium MD2 and the flow rate, which means that (assuming a constant heating output, the respective temperature on the heating element HZ1, HZ2 and in the immediate vicinity of the heating element HZ1, HZ2 is different.
  • the voltage across the temperature sensor TS1, TS2 thus changes, depending on the flow rate and the physical properties of the second medium MD2.
  • FIG. 3 Change in the difference AU when a bubble passes the two measuring points MS1, MS2
  • FIG. 4 change in the flow velocity. Both figures show a graph based on real measurements, the ordinate of which represents the difference AU and the abscissa of which represents the course of time t. The curve of the recorded difference AU over time is shown in each case.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

L'invention concerne un procédé pour détecter des bulles (BL) ou des gouttelettes d'un premier milieu (MD1) dans un deuxième milieu (MD2) fluide traversant un tube de mesure (MR), un premier élément de chauffage (He1) étant agencé au niveau d'un premier point de mesure (MS1) sur le tube de mesure (MR), un deuxième élément de chauffage (HE2) étant agencé au niveau d'un deuxième point de mesure (MS2) sur le tube de mesure (MR), le deuxième point de mesure (MS2) étant disposé à distance du premier point de mesure (MS1) dans le sens d'écoulement (FR). Le procédé comprend les étapes consistant à : chauffer le premier élément de chauffage (HE1) et le deuxième élément de chauffage (HE2) au moyen d'une énergie électrique ; détecter simultanément la température ambiante du premier point de mesure (MS1) au moyen d'un premier capteur de température (TS1) et la température ambiante du deuxième point de mesure (MS2) au moyen d'un deuxième capteur de température (TS2), une première grandeur de mesure électrique (U1) du premier capteur de température (TS1) étant déterminée pour la détection de la température ambiante du premier point de mesure (MS1), une deuxième grandeur de mesure électrique (U2) du deuxième capteur de température (TS2) étant déterminée pour la détection de la température ambiante du deuxième point de mesure (MS2) ; établir une différence (ΔU) entre la première grandeur de mesure électrique (U1) et la deuxième grandeur de mesure électrique (U2), et ; comparer la valeur de la différence (ΔU) à une valeur limite de référence (ΔU_Ref), la présence d'une bulle (BL) ou d'une gouttelette étant détectée si la valeur de la différence (ΔU) passe au-dessus de la valeur limite de référence au moins brièvement. Cette invention concerne en outre un système de détection conçu pour mettre en œuvre ce procédé.
EP22762077.0A 2021-09-02 2022-08-10 Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure Pending EP4396540A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021122790.9A DE102021122790A1 (de) 2021-09-02 2021-09-02 Verfahren zum Detektieren von Blasen oder Tröpfchen eines ersten Mediums in einem ein Messrohr durchströmenden fluiden zweiten Medium
PCT/EP2022/072451 WO2023030844A1 (fr) 2021-09-02 2022-08-10 Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure

Publications (1)

Publication Number Publication Date
EP4396540A1 true EP4396540A1 (fr) 2024-07-10

Family

ID=83151565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22762077.0A Pending EP4396540A1 (fr) 2021-09-02 2022-08-10 Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure

Country Status (5)

Country Link
US (1) US20240361165A1 (fr)
EP (1) EP4396540A1 (fr)
CN (1) CN117980704A (fr)
DE (1) DE102021122790A1 (fr)
WO (1) WO2023030844A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025090073A1 (fr) * 2023-10-24 2025-05-01 Micro Motion, Inc. Synchronisation temporelle dans un système d'écoulement de fluide

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL83702C (fr) * 1946-05-21 1900-01-01
DE3939885A1 (de) 1989-12-01 1991-06-06 Siemens Ag Stroemungsdetektor
CH695166A5 (de) * 2000-04-25 2005-12-30 Sensirion Ag Verfahren und Vorrichtung zum Messen des Flusses einer Flüssigkeit.
DE102004030028A1 (de) * 2004-06-22 2006-01-12 SIMICON Gesellschaft für Hygiene-, Umwelt- und Sicherheitstechnik mbH Verfahren und Vorrichtung zur Messung von nichtkondensierbaren Gasen und Dämpfen in einem Dampf-Gasgemisch mit gleichzeitiger Bestimmung der Massen-oder Volumenströme der untersuchten Probe
DE102005057687A1 (de) 2005-12-01 2007-06-06 Endress + Hauser Flowtec Ag Vorrichtung zur Bestimmung und/oder Überwachung des Massedurchflusses eines fluiden Mediums
JP5096286B2 (ja) * 2008-10-28 2012-12-12 日機装株式会社 気泡検出装置及び生体成分測定装置
DE102013114486A1 (de) * 2013-12-19 2015-06-25 Innovative Sensor Technology Ist Ag Vorrichtung und Verfahren zum Bestimmen des Durchflusses eines Mediums
AU2015317280B2 (en) 2014-09-18 2018-12-20 Csir Electronically deriving a conclusion of the condition of slurry flow in a non-vertical conduit
DE102014119556A1 (de) 2014-12-23 2016-06-23 Endress + Hauser Flowtec Ag Thermisches Durchflussmessgerät
EP3076137B1 (fr) * 2015-11-13 2019-01-30 Sensirion AG Capteur d'écoulement pour détecter une bulle d'air, en particulier dans un cathéter, et procédé correspondant
DE102016116101A1 (de) 2016-08-30 2018-03-01 Innovative Sensor Technology Ist Ag Sensorelement und thermischer Strömungssensor zur Messung einer physikalischen Größe eines Messmediums
US10842950B2 (en) * 2017-08-15 2020-11-24 Biosense Webster (Israel) Ltd. Detection of bubbles in irrigation fluid
DE102018130547A1 (de) 2018-11-30 2020-06-04 Innovative Sensor Technology Ist Ag Sensorelement, Verfahren zu dessen Herstellung und thermischer Strömungssensor

Also Published As

Publication number Publication date
US20240361165A1 (en) 2024-10-31
WO2023030844A1 (fr) 2023-03-09
CN117980704A (zh) 2024-05-03
DE102021122790A1 (de) 2023-03-02

Similar Documents

Publication Publication Date Title
DE102007023840B4 (de) Thermischer Massendurchflussmesser und Verfahren zu dessen Betrieb
EP2869040B1 (fr) Capteur de flux destiné à la détermination d'un paramètre d'écoulement et son procédé de détermination
EP4158285B1 (fr) Capteur de flux thermique et son procédé d'exploitation
EP2758755B1 (fr) Procédé servant à appréhender une propriété d'écoulement d'un milieu fluide en écoulement
EP3887770B1 (fr) Capteur d'écoulement thermique et procédé pour le faire fonctionner
DE102007023823B4 (de) Thermischer Massendurchflussmesser und Verfahren zu seinem Betrieb
WO2019048210A1 (fr) Débitmètre thermique
EP4314722B1 (fr) Capteur thermique et son procédé de fonctionnement
DE102010030952B4 (de) Vorrichtung zur Bestimmung und/oder Überwachung eines Volumendurchflusses und/oder einer Durchflussgeschwindigkeit
DE102009000067A1 (de) Vorrichtung zur Bestimmung und/oder Überwachung eines Massedurchflusses und Vorrichtung zur Bestimmung und/oder Überwachung einer Anlagerung einer Substanz
EP4396540A1 (fr) Procédé de détection de bulles ou de gouttelettes d'un premier milieu dans un deuxième milieu fluide traversant un tube de mesure
DE102009046653A1 (de) Magnetisch-induktives Durchflussmesssystem mit beheizbarem Widerstandsthermometer
DE102013002598B4 (de) Abweichungskompensation für Flusssensorelemente
EP2889587B1 (fr) Dispositif de détermination d'un paramètre d'écoulement d'un flux de liquide
DE102011050716B4 (de) Verfahren und Vorrichtung zur Online-Messung der Viskosität eines Fluids
WO1995011427A1 (fr) Procede et dispositif pour la determination, notamment non invasive, d'au moins un parametre interessant d'un systeme fluide/tuyau
WO1998022784A1 (fr) Procede et dispositif pour la mesure autocompensee du debit volumetrique de gaz
DE102010018948B4 (de) Thermischer Massendurchflussmesser mit zusätzlichen Sensormitteln sowie Verfahren zum Betrieb desselben
CH662884A5 (de) Waermemengenmesser.
DE102011010461A1 (de) Sensor, Vorrichtung und Verfahren zur thermischen Durchflussmessung
DE1913544A1 (de) Messverfahren und Vorrichtung zur Bestimmung der Stroemungsgeschwindigkeit und Stroemungsrichtung eines Mediums
EP2795262B1 (fr) Procédé pour la détection d'une précipitation de gouttelettes sur un capteur chauffé de température
DE19846917A1 (de) Verfahren und Vorrichtung zum Betreiben eines Thermoelementes
DE102018124069A1 (de) Magnetisch-induktives Durchflussmessgerät mit Sensor zur Erfassung einer weiteren Messgröße
DE102023121535A1 (de) Thermischer Strömungssensor und Verfahren zum Betreiben desselben

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240223

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20251106