DE202010004504U1 - Measuring device for the thermal measurement of flow velocities - Google Patents
Measuring device for the thermal measurement of flow velocities Download PDFInfo
- Publication number
- DE202010004504U1 DE202010004504U1 DE201020004504 DE202010004504U DE202010004504U1 DE 202010004504 U1 DE202010004504 U1 DE 202010004504U1 DE 201020004504 DE201020004504 DE 201020004504 DE 202010004504 U DE202010004504 U DE 202010004504U DE 202010004504 U1 DE202010004504 U1 DE 202010004504U1
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- DE
- Germany
- Prior art keywords
- measuring device
- thermal
- flowing medium
- measuring
- flow
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
-
- 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
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
- G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
Abstract
Messeinrichtung zur thermischen Messung von Fließgeschwindigkeiten gekennzeichnet durch einen beheizten, thermischen Sensor dessen abgeführte Wärmemenge durch das fließende Medium genutzt wird um die Geschwindigkeit des selben zu messen.Measuring device for the thermal measurement of flow rates characterized by a heated thermal sensor whose dissipated heat is used by the flowing medium to measure the speed of the same.
Description
Es
bestehen vielfältige Möglichkeiten das Fließen
eines Mediums zu messen, unter anderem, elektrisch (
In der Hydrometrie ergibt sich die besondere Problematik langsam fließende Gewässer zu messen, die verschmutzt und verkrautet sind, was den Einsatz von konventionell genutzten Flügelrädern behindert bis unmöglich macht.In Hydrometry gives rise to the particular problem of slowly flowing To measure waters that are polluted and weeded, what the use of conventionally used impellers hinders until impossible.
Die Messeinrichtung nutzt die beim Heizen einer thermischen Sonde durch ein fließendes Medium abgeführte Wärmemenge und ist unabhängig von Fließrichtung, Lichtausbreitung, Magnetisierbarkeit, Polarisierbarkeit, Schallausbreitung und ähnlichen Eigenschaften anderer Messmethoden und des fließenden Mediums. Die Geschwindigkeitsmessung wird dabei indirekt durch die Temperaturmessung an der Sonde bei bekannter Heizleistung realisiert. Die Sonde muss nur eine geringe Wärmekapazität im Vergleich zum Medium, eine geringe Wärmeleitung zur Halterung, eine die Strömung nicht stark einschränkende Form und definierte Reizbarkeit haben. Grundsätzlich können sowohl gasförmige als auch flüssige Medien mit beschriebener Anordnung gemessen werden.The Measuring device uses the heating of a thermal probe through a flowing medium dissipated amount of heat and is independent of the direction of flow, light propagation, Magnetizability, polarizability, sound propagation and similar properties other measurement methods and the fluid. The speed measurement will thereby indirectly by the temperature measurement at the probe at a known Heating power realized. The probe only has a low heat capacity in comparison to the medium, a low heat conduction to Mount, a flow that does not severely limit the flow Have shape and defined irritability. Basically you can both gaseous and liquid media with be described arrangement measured.
Thermische Messungen der Fließgeschwindigkeit sind statisch, im thermischen Gleichgewicht und dynamisch durch thermische Zyklen möglich. Im Gleichgewicht bleibt die Temperatur des geheizten Sensors im fließenden Medium konstant und die Heizleistung entspricht der durch die konstante Strömung abgeführten Energie. Bei der dynamischen Messung wird zyklisch (z. B. elektrisch mit einem rechteckförmigen Heizpuls) geheizt, wobei sowohl die Aufwärmphase, als auch die Abkühlphase des Zyklus zum Messen genutzt werden kann.thermal Flow rate measurements are static, thermal Balance and dynamic possible through thermal cycles. The temperature of the heated sensor remains in equilibrium flowing medium constant and the heating power corresponds the energy dissipated by the constant flow. In the dynamic measurement is cyclically (eg electrically with a rectangular heating pulse), both the Warm-up phase, as well as the cooling phase of the cycle can be used for measuring.
Die physikalischen Größen Spannung, Strom, Temperatur und Zeit lassen sich sehr einfach elektronisch messen und ermöglichen die direkte Nutzung elektronischer Datenverarbeitung zur Messung der Fließgeschwindigkeit. Dabei lassen sich charakteristische Aufwärm- und Abkühlfunktionen über die Zeit bei verschiedenen Temperaturen speichern und mit aktuellen Messungen schnell vergleichen.The physical quantities voltage, current, temperature and time are very easy to measure and enable electronically the direct use of electronic data processing for measurement the flow rate. This can be characteristic Warm-up and cool down functions over the Save time at different temperatures and with current Compare measurements quickly.
Die elektrische Heizung ist sicherlich die einfachste Lösung, aber auch optische (z. B. Infrarotstrahlung), akustische (z. B. Ultraschall) oder andere schnelle Verfahren sind möglich.The Electric heating is certainly the simplest solution but also optical (eg infrared radiation), acoustic (eg. Ultrasound) or other fast methods are possible.
In erster Näherung ist die abgeführte, thermische Energie proportional zur kinetischen Energie des fließenden Mediums und damit zum Quadrat der Fließgeschwindigkeit. Die Wärmekapazität der Flüssigkeit ist entscheidend für die benötigte Heizleistung und in hinreichenden Bereichen konstant.In first approximation is the dissipated, thermal Energy proportional to the kinetic energy of the flowing Medium and thus the square of the flow velocity. The heat capacity of the liquid is crucial for the required heating power and constant in sufficient areas.
Weiterhin besteht die Möglichkeit einer optimale Anpassung des thermischen Sensors an das fließende Medium (erwarteter Geschwindigkeits- und Temperaturbereich, Wärmekapazität usw.) und die Messbedingungen (biologische, chemische, mechanische Rahmenbedingungen, Zugänglichkeit usw.).Farther there is the possibility of an optimal adaptation of the thermal Sensor to the flowing medium (expected velocity and temperature range, heat capacity, etc.) and the measuring conditions (biological, chemical, mechanical conditions, Accessibility, etc.).
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10238362 B4 [0001] - DE 10238362 B4 [0001]
- - DE 102006024363 A1 [0001] - DE 102006024363 A1 [0001]
- - DE 10036732 C2 [0001] - DE 10036732 C2 [0001]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201020004504 DE202010004504U1 (en) | 2010-03-26 | 2010-03-26 | Measuring device for the thermal measurement of flow velocities |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201020004504 DE202010004504U1 (en) | 2010-03-26 | 2010-03-26 | Measuring device for the thermal measurement of flow velocities |
Publications (1)
Publication Number | Publication Date |
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DE202010004504U1 true DE202010004504U1 (en) | 2010-09-30 |
Family
ID=42814029
Family Applications (1)
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DE201020004504 Expired - Lifetime DE202010004504U1 (en) | 2010-03-26 | 2010-03-26 | Measuring device for the thermal measurement of flow velocities |
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DE (1) | DE202010004504U1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10036732C2 (en) | 2000-04-24 | 2003-12-04 | Chang Min Tech Co | Device for flow velocity measurement with ultrasound |
DE10238362B4 (en) | 2002-08-22 | 2005-08-11 | Abb Patent Gmbh | Method and device for flow velocity measurement of conductive and non-conductive media |
DE102006024363A1 (en) | 2006-05-24 | 2007-11-29 | Robert Bosch Gmbh | Fluids volume- and flow-speed measurement e.g. for respiration air of patients, uses micro-mechanical air-mass sensor for connection as pluggable sensor |
-
2010
- 2010-03-26 DE DE201020004504 patent/DE202010004504U1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10036732C2 (en) | 2000-04-24 | 2003-12-04 | Chang Min Tech Co | Device for flow velocity measurement with ultrasound |
DE10238362B4 (en) | 2002-08-22 | 2005-08-11 | Abb Patent Gmbh | Method and device for flow velocity measurement of conductive and non-conductive media |
DE102006024363A1 (en) | 2006-05-24 | 2007-11-29 | Robert Bosch Gmbh | Fluids volume- and flow-speed measurement e.g. for respiration air of patients, uses micro-mechanical air-mass sensor for connection as pluggable sensor |
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Legal Events
Date | Code | Title | Description |
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R207 | Utility model specification |
Effective date: 20101104 |
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R156 | Lapse of ip right after 3 years |
Effective date: 20131001 |