DE3820336A1 - Method for the determination of the time-related volume flow of a flow medium through a specimen - Google Patents
Method for the determination of the time-related volume flow of a flow medium through a specimenInfo
- Publication number
- DE3820336A1 DE3820336A1 DE3820336A DE3820336A DE3820336A1 DE 3820336 A1 DE3820336 A1 DE 3820336A1 DE 3820336 A DE3820336 A DE 3820336A DE 3820336 A DE3820336 A DE 3820336A DE 3820336 A1 DE3820336 A1 DE 3820336A1
- Authority
- DE
- Germany
- Prior art keywords
- flow
- time
- volume flow
- specimen
- fluid
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/14—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs. In erster Linie ist dabei an die Kalibrierung von Durchflußmessern für gasförmige Strömungsmittel gedacht.The invention relates to a method according to the preamble of Claim. First and foremost is calibration of flow meters intended for gaseous fluids.
Bekannte Kalibriersysteme arbeiten mit Gaszählern verschiedener Bauart oder messen den Volumenstrom beispielsweise mittels kriti scher Düsen. Gemeinsam ist diesen bekannten Systemen eine Temperatur- und Druckabhängigkeit, die durch umständliche Maßnahmen zur Konstant haltung berücksichtigt werden muß. Abgesehen von dem hohen Aufwand, der ebenfalls allen bekannten Systemen gemeinsam ist, besitzen die mechanischen Gaszähler nur eine begrenzte Genauigkeit und Zuverlässigkeit, da bei ihnen Reibungsverluste nicht zu vermeiden sind.Known calibration systems work with different gas meters Design or measure the volume flow, for example using kriti shear nozzles. Common to these known systems is a temperature and pressure dependency, which is complicated by constant measures attitude must be taken into account. Apart from the high effort, which is also common to all known systems the mechanical gas meters have limited accuracy and Reliability, since friction losses cannot be avoided with them are.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren gemäß dem Oberbegriff des Patentanspruchs zu schaffen, das bei geringem Aufwand praktisch unabhängig von der jeweiligen Temperatur und dem Druck eine hohe Meßgenauigkeit besitzt.The invention has for its object a method according to the preamble of the claim to create that at low Effort practically independent of the respective temperature and the pressure has a high measuring accuracy.
Das diese Aufgabe lösende erfindungsgemäße Verfahren besteht in den kennzeichnenden Merkmalen des Patentanspruchs. The method according to the invention which achieves this object consists in the characterizing features of the claim.
Die Erfindung bietet darüber hinaus den Vorteil, daß sich durch Variieren der definierten Zeitspanne, also der Meßzeit, Durchfluß messer mit unterschiedlichen Durchflußraten unter Ausnutzung iden tischer Meßaufbauten kalibrieren lassen. Infolge der Verwendung einer Waage und Differenzbildung ist eine störende Druck- oder Temperaturabhängigkeit der Meßwerte vermieden.The invention also has the advantage that Varying the defined period of time, i.e. the measuring time, flow iden with different flow rates Have the test setup calibrated. As a result of use a balance and difference formation is an annoying pressure or Temperature dependence of the measured values avoided.
Das erfindungsgemäße Verfahren wird im folgenden anhand der Zeichnung erläutert, die eine Vorrichtung zur Durchführung des Verfahrens wiedergibt.The method according to the invention is described below with reference to the drawing which explains an apparatus for performing the method reproduces.
Als Prüfling 1 ist in die Meßleitung 2, die an ihrem in der Figur rechten Ende 3 mit einer Entsorgung in Verbindung steht, ein zu kalibrierender Durchflußmesser eingeschaltet. Die von ihm ermittelten Durchflußwerte können bei 4 abgelesen werden.A flow meter to be calibrated is switched on as test object 1 in the measuring line 2 , which is connected to disposal at its right end 3 in the figure. The flow values determined by him can be read at 4 .
Die Leitung 2 mündet über Druckgasmanometer 5 und das Entnahmeven til 6 in die mit einem als Strömungsmittel dienenden Gas unter Druck gefüllte Flasche 7 ein, die auf der Waagschale 8 der allgemein mit 9 bezeichneten Waage steht.The line 2 opens via pressure gas manometer 5 and the Entnahmeven valve 6 in the bottle filled with a serving as a fluid gas under pressure bottle 7 , which stands on the weighing pan 8 of the scale generally designated 9 .
Die Höhe des Drucks des Gases in dem Behälter 7 ist so gewählt, daß eine für die Messung ausreichende Durchströmung der Leitung 2 und damit des Prüflings 1 im Sinne des Pfeils 10 gewährleistet ist.The level of the pressure of the gas in the container 7 is chosen so that a sufficient flow for the measurement through the line 2 and thus the test object 1 is ensured in the direction of arrow 10 .
Während einer vorgegebenen Zeitspanne wird der Prüfling 1 von dem Gas durchströmt, so daß sich die Masse des gasgefüllten Behäl ters 7 verringert. Damit der Behälter 7 sich dabei in senkrechter Richtung auf der Waage 9 bewegen kann, enthält die Leitung 2 die bei 11 angedeutete Schleife. During a predetermined period of time, the test object 1 is flowed through by the gas, so that the mass of the gas-filled container age 7 is reduced. So that the container 7 can move in the vertical direction on the scale 9 , the line 2 contains the loop indicated at 11 .
Bei dem erfindungsgemäßen Verfahren wird mittels der Waage 9 vor und nach der die Meßzeit darstellenden Zeitspanne die Masse des gefüllten Behälters 7 ermittelt. Aus der Differenz dieser beiden Massenwerte ergibt sich nach der im Patentanspruch angegebenen Beziehung der tatsächliche Volumenstrom.In the method according to the invention, the mass of the filled container 7 is determined by means of the balance 9 before and after the time period representing the measuring time. The difference between these two mass values gives the actual volume flow according to the relationship specified in the claim.
Mit der Erfindung ist also ein besonders einfaches und doch exaktes Verfahren zur Bestimmung des zeitbezogenen Volumenstromes eines Strömungsmittels geschaffen, das insbesondere zur Kalibrierung von Strömungsmessern Einsatz finden kann.So with the invention is a particularly simple yet precise Method for determining the time-related volume flow of a Fluid created, in particular for calibration of flow meters can be used.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3820336A DE3820336A1 (en) | 1987-06-26 | 1988-06-15 | Method for the determination of the time-related volume flow of a flow medium through a specimen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3721157 | 1987-06-26 | ||
DE3820336A DE3820336A1 (en) | 1987-06-26 | 1988-06-15 | Method for the determination of the time-related volume flow of a flow medium through a specimen |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3820336A1 true DE3820336A1 (en) | 1989-01-05 |
Family
ID=25856987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3820336A Withdrawn DE3820336A1 (en) | 1987-06-26 | 1988-06-15 | Method for the determination of the time-related volume flow of a flow medium through a specimen |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3820336A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19647446A1 (en) * | 1996-11-16 | 1998-05-20 | Messer Griesheim Gmbh | Flow quantity measurement method for liquid gas |
DE19947992A1 (en) * | 1999-10-06 | 2001-05-10 | Alfred Schoepf | Flowmeter inspection method for flowmeter build into pipeline system, involves comparing detected measurement result of flowmeter with input signal corresponding to amount of fluid flowing in pipeline system |
DE102011053843A1 (en) * | 2011-09-21 | 2013-03-21 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Device for calibrating and/or monitoring certain operation condition of test mass flow measuring device, has tanks star-connected with each other, and tank device coupled to balancing device |
CN109269587A (en) * | 2018-09-28 | 2019-01-25 | 嘉兴学院 | A kind of device and its application method of laboratory measurement biogas volume |
WO2021087540A1 (en) * | 2019-11-06 | 2021-05-14 | Avl List Gmbh | Measuring method and measuring apparatus for determining a flow rate of a process gas |
-
1988
- 1988-06-15 DE DE3820336A patent/DE3820336A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19647446A1 (en) * | 1996-11-16 | 1998-05-20 | Messer Griesheim Gmbh | Flow quantity measurement method for liquid gas |
DE19947992A1 (en) * | 1999-10-06 | 2001-05-10 | Alfred Schoepf | Flowmeter inspection method for flowmeter build into pipeline system, involves comparing detected measurement result of flowmeter with input signal corresponding to amount of fluid flowing in pipeline system |
DE19947992C2 (en) * | 1999-10-06 | 2003-03-13 | Alfred Schoepf | Method and measuring system for checking a flow meter when installed |
DE102011053843A1 (en) * | 2011-09-21 | 2013-03-21 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Device for calibrating and/or monitoring certain operation condition of test mass flow measuring device, has tanks star-connected with each other, and tank device coupled to balancing device |
DE102011053843B4 (en) * | 2011-09-21 | 2020-11-19 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Device and method for calibrating and / or monitoring a test mass flow meter |
CN109269587A (en) * | 2018-09-28 | 2019-01-25 | 嘉兴学院 | A kind of device and its application method of laboratory measurement biogas volume |
WO2021087540A1 (en) * | 2019-11-06 | 2021-05-14 | Avl List Gmbh | Measuring method and measuring apparatus for determining a flow rate of a process gas |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8120 | Willingness to grant licences paragraph 23 | ||
8139 | Disposal/non-payment of the annual fee |