WO2010121650A1 - Method and device for calibrating liquid meters - Google Patents
Method and device for calibrating liquid meters Download PDFInfo
- Publication number
- WO2010121650A1 WO2010121650A1 PCT/EP2009/054745 EP2009054745W WO2010121650A1 WO 2010121650 A1 WO2010121650 A1 WO 2010121650A1 EP 2009054745 W EP2009054745 W EP 2009054745W WO 2010121650 A1 WO2010121650 A1 WO 2010121650A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- counter
- quotient
- return
- meters
- measured values
- Prior art date
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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
- G01F1/05—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
-
- 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
Definitions
- the invention relates to a method for calibrating liquid meters, which are used to measure the difference between flow and return in a liquid circuit with a tank and a consumer.
- the invention further relates to a device for carrying out the method.
- Liquid meters are usually calibrated by the manufacturer prior to shipment. In the course of use, e.g. due to natural wear and tear of the mechanical parts, the fluid meters produce increasing measurement deviations, which distort a calculated consumption more and more. A new calibration is usually carried out as part of an overhaul with the aid of calibration stands, and usually also at the manufacturer. For this purpose, the counters must be removed, which is associated with a mostly undesirable business interruption.
- the invention has for its object to make the calibration of liquid meters in a way that is not associated with the mentioned disadvantages.
- the device according to the invention is equipped with a computer which is connected to the counters and evaluates and records the detected measured values of the counters.
- the quotient of the measured values of a flow and a return flow counter at zero consumption at the beginning of their use is determined as the reference factor, which ideally has the value 1. This is then compared at intervals with a quotient currently determined at zero consumption.
- the pulse valency of the counter ie the volume per Zählradumformatung tracked.
- the drawing shows a block diagram of a fuel circuit between a fuel tank and an engine, as is typically found in marine propulsion or other large engines.
- a fuel tank 1 is connected to a motor 3 via a supply pipe (supply pipe) 2.
- a fuel meter (flow meter) 4 which measures the amount of fuel flowing from the tank to the engine.
- the fuel supply is usually applied as a cycle, i. Between the tank and the engine there is an amount of fuel that is greater than the maximum consumption. The unused fuel amount is returned via a return line 5 to the tank. In the return line there is a return counter 6, which measures the amount of fuel flowing back to the tank.
- the difference of the measured from the flow meter 4 and the return counter 6 values represents the consumption. If no consumption takes place by the engine, so ships For example, in a roadstead or in a harbor, the measured difference is ideally equal to zero, or the reference factor is equal to 1.
- This method ensures that the measuring error of the consumption is minimized and the measuring meters can be used longer despite increasing and individually different deviations from the original measuring accuracy.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a method and device for calibrating liquid meters for measuring the difference between the feed and return in a liquid cycle comprising a reservoir and a consumer, wherein the measurement data of the meters are continuously acquired and stored. If any deviations from an initial reference value are detected, the pulse value of the meters is adapted.
Description
Verfahren und Einrichtung zur Kalibrierung von Flüssigkeitszählern Method and device for calibrating liquid meters
Die Erfindung betrifft ein Verfahren zur Kalibrierung von Flüssigkeitszählern, die zur Messung der Differenz zwischen Vorlauf und Rücklauf in einem Flüssigkeitskreislaufs mit einem Tank und einem Verbraucher eingesetzt werden. Die Erfindung betrifft ferner eine Einrichtung zur Durchführung des Verfahrens.The invention relates to a method for calibrating liquid meters, which are used to measure the difference between flow and return in a liquid circuit with a tank and a consumer. The invention further relates to a device for carrying out the method.
Flüssigkeitszähler werden üblicherweise vor der Auslieferung vom Hersteller kalibriert. Im Laufe der Nutzung können, z.B. wegen natürlicher Abnutzung der mechanischen Teile, in den Flüssigkeitszählern zunehmende Messabweichungen entstehen, durch die ein berechneter Verbrauch mehr und mehr verfälscht wird. Eine erneute Kalibrierung erfolgt in der Regel im Rahmen einer Überholung unter Zuhilfenahme von Kalibrierständen, und zwar meistens ebenfalls beim Hersteller. Zu diesem Zweck müssen die Zähler ausgebaut werden, was mit einer meistens unerwünschten Betriebsunterbrechung verbunden ist.Liquid meters are usually calibrated by the manufacturer prior to shipment. In the course of use, e.g. due to natural wear and tear of the mechanical parts, the fluid meters produce increasing measurement deviations, which distort a calculated consumption more and more. A new calibration is usually carried out as part of an overhaul with the aid of calibration stands, and usually also at the manufacturer. For this purpose, the counters must be removed, which is associated with a mostly undesirable business interruption.
Der Erfindung liegt die Aufgabe zugrunde, die Kalibrierung von Flüssigkeitszählern in einer Weise vorzunehmen, die nicht mit den erwähnten Nachteilen verbunden ist.The invention has for its object to make the calibration of liquid meters in a way that is not associated with the mentioned disadvantages.
Erfindungsgemäss wird dies dadurch erreicht, dass die Messdaten der Zähler im Flüssigkeitskreislauf kontinuierlich erfasst und gespeichert werden. Zu diesem Zweck ist die er- findungsgemässe Einrichtung mit einem Rechner ausgestattet, der mit den Zählern verbunden ist und die erfassten Messwerte der Zähler auswertet und aufzeichnet.
Gemäss einer bevorzugten Ausführungsform der Erfindung wird der Quotient der Messwerte eines Vorlauf- und eines Rücklaufzählers bei Nullverbrauch zu Beginn ihres Einsatzes als Referenzfaktor ermittelt, der idealerweise den Wert 1 hat. Dieser wird danach in Abständen mit einem aktuell bei Nullverbrauch ermittelten Quotienten verglichen. Vorzugsweise wird aufgrund eines vom Referenzwert abweichenden Quotienten die Pulswertigkeit der Zähler, d.h. das Volumen pro Zählradumdrehung, nachgeführt.According to the invention, this is achieved by continuously recording and storing the measurement data of the counters in the liquid circuit. For this purpose, the device according to the invention is equipped with a computer which is connected to the counters and evaluates and records the detected measured values of the counters. According to a preferred embodiment of the invention, the quotient of the measured values of a flow and a return flow counter at zero consumption at the beginning of their use is determined as the reference factor, which ideally has the value 1. This is then compared at intervals with a quotient currently determined at zero consumption. Preferably, due to a deviating from the reference value quotient, the pulse valency of the counter, ie the volume per Zählradumdrehung tracked.
Im Folgenden wird anhand der beiliegenden Zeichnung eine bevorzugte Ausführungsform der Erfindung beschrieben. Die Zeichnung zeigt ein Blockdiagramm eines Kraftstoffkreis- laufs zwischen einem Kraftstofftank und einem Motor, wie er typischerweise bei einem Schiffsantrieb oder anderen grossen Motoren vorkommt.In the following, a preferred embodiment of the invention will be described with reference to the accompanying drawings. The drawing shows a block diagram of a fuel circuit between a fuel tank and an engine, as is typically found in marine propulsion or other large engines.
Ein Kraftstofftank 1 ist über eine Zuführungsleitung (Vorlaufleitung) 2 mit einem Motor 3 verbunden. In der Leitung 2 befindet sich ein Kraftstoffzähler (Vorlaufzähler) 4, der die vom Tank zum Motor strömende Kraftstoffmenge misst.A fuel tank 1 is connected to a motor 3 via a supply pipe (supply pipe) 2. In line 2 is a fuel meter (flow meter) 4, which measures the amount of fuel flowing from the tank to the engine.
Bei Schiffsmotoren oder anderen grossen Motoren ist die Kraftstoffzufuhr in der Regel als Kreislauf angelegt, d.h. zwischen Tank und Motor zirkuliert eine Kraftstoffmenge, die grösser ist als der maximale Verbrauch. Die nicht verbrauchte Kraftstoffmenge wird über eine Rücklaufleitung 5 zum Tank zurückgeführt. In der Rücklaufleitung befindet sich ein Rücklaufzähler 6, der die zum Tank zurückfliessen- de Kraftstoffmenge misst.In marine engines or other large engines, the fuel supply is usually applied as a cycle, i. Between the tank and the engine there is an amount of fuel that is greater than the maximum consumption. The unused fuel amount is returned via a return line 5 to the tank. In the return line there is a return counter 6, which measures the amount of fuel flowing back to the tank.
Die Differenz der vom Vorlaufzähler 4 und vom Rücklaufzähler 6 gemessenen Werte stellt den Verbrauch dar. Wenn kein Verbrauch durch den Motor stattfindet, bei Schiffen also
beispielsweise auf Reede oder in einem Hafen, ist die gemessene Differenz idealerweise gleich Null, bzw. der Referenzfaktor gleich 1.The difference of the measured from the flow meter 4 and the return counter 6 values represents the consumption. If no consumption takes place by the engine, so ships For example, in a roadstead or in a harbor, the measured difference is ideally equal to zero, or the reference factor is equal to 1.
Die regelmässige Kalibrierung erfolgt in der Weise, dass kurz nach der Installation der Zähler, wenn sie noch im Zustand der Herstellerkalibrierung sind, der Referenzwert ermittelt wird, der in Idealfall den Wert 1 hat. Bei weiteren Messungen wird die Abweichung vom Referenzfaktor im Regel- fall grösser, bis eine Nachkalibrierung erfolgt. Diese erfolgt in der weise, dass die Pulswertigkeit der Zähler, d.h. das Volumen pro Zählradumdrehung, nachgeführt wird.Regular calibration is carried out in such a way that, shortly after installation, the counter, when still in the condition of manufacturer calibration, determines the reference value, which in the ideal case has the value 1. For further measurements, the deviation from the reference factor usually increases until recalibration takes place. This is done in such a way that the pulse valency of the counters, i. the volume per Zählradumdrehung, tracked.
Durch dieses Verfahren wird erreicht, dass der Messfehler des Verbrauchs minimiert wird und die Messzähler trotz steigender und individuell unterschiedlicher Abweichungen von der ursprünglichen Messgenauigkeit länger eingesetzt werden können.
This method ensures that the measuring error of the consumption is minimized and the measuring meters can be used longer despite increasing and individually different deviations from the original measuring accuracy.
Claims
1. Verfahren zur Kalibrierung von Flüssigkeitszählern, die zur Messung der Differenz zwischen Vorlauf und Rücklauf in einem Flüssigkeitskreislauf mit einem Tank und einem Verbraucher eingesetzt werden, dadurch gekennzeichnet, dass die Messdaten der Zähler im Flüssigkeitskreislauf kontinuierlich erfasst und gespeichert werden.1. A method for calibrating liquid meters, which are used to measure the difference between flow and return in a fluid circuit with a tank and a consumer, characterized in that the measurement data of the counter in the fluid circuit continuously detected and stored.
2. Kalibrierverfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Quotient der Messwerte eines Vorlauf- und eines RücklaufZählers bei Nullverbrauch zu Beginn ihres Einsatzes als Referenzfaktor ermittelt wird.2. Calibration method according to claim 1, characterized in that the quotient of the measured values of a flow and a return counter is determined at zero consumption at the beginning of their use as a reference factor.
3. Kalibrierverfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Quotient der Messwerte in Abständen mit einem aktuell bei Nullverbrauch ermittelten Quotienten verglichen wird.3. Calibration method according to claim 2, characterized in that the quotient of the measured values is compared at intervals with a quotient currently determined at zero consumption.
4. Kalibrierverfahren nach Anspruch 3, dadurch gekennzeichnet, dass aufgrund eines vom Referenzwert abweichenden Quotienten die Pulswertigkeit der Zähler, d.h. das Volumen pro Zählradumdrehung, nachgeführt wird.4. Calibration method according to claim 3, characterized in that due to a deviating from the reference value quotient the pulse valency of the counter, i. the volume per Zählradumdrehung, tracked.
5. Einrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1-4 mit in je einem in einer Vorlaufleitung und einer Rücklaufleitung angeordneten Flüssigkeitszähler und einem mit den Messwertausgängen der Zähler verbundenen Rechner zur Erfassung, Auswertung und Speicherung der Messwerte.5. Device for carrying out the method according to one of claims 1-4 with in each case one arranged in a flow line and a return line liquid meter and connected to the measured value outputs of the counter computer for the detection, evaluation and storage of the measured values.
6. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Rechner mit Mitteln zum Nachführen der Pulswertigkeit der Zähler ausgestattet ist. 6. Device according to claim 5, characterized in that the computer is equipped with means for tracking the pulse value of the counter.
Priority Applications (1)
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PCT/EP2009/054745 WO2010121650A1 (en) | 2009-04-21 | 2009-04-21 | Method and device for calibrating liquid meters |
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PCT/EP2009/054745 WO2010121650A1 (en) | 2009-04-21 | 2009-04-21 | Method and device for calibrating liquid meters |
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PCT/EP2009/054745 WO2010121650A1 (en) | 2009-04-21 | 2009-04-21 | Method and device for calibrating liquid meters |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102288263A (en) * | 2011-07-25 | 2011-12-21 | 中国计量学院 | Device for calibrating gas flow meter in pipeline on line |
CN102353410A (en) * | 2011-06-27 | 2012-02-15 | 清华大学 | Method and device utilizing trace gas to measure air channel volume |
CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
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GB2342721A (en) * | 1998-10-16 | 2000-04-19 | Cummins Engine Co Inc | Calibration of an airflow sensor |
DE10054199A1 (en) * | 2000-11-02 | 2002-05-16 | Siemens Ag | Testing of an airflow meter used with a motor vehicle combustion engine to ensure its correct operation by switching off exhaust gas recirculation and then measuring airflow and comparing it with a stored value |
US20020101373A1 (en) * | 2000-12-08 | 2002-08-01 | Arndt G. Dickey | Measurment system and method |
US20040149003A1 (en) * | 2003-01-31 | 2004-08-05 | Ab Volvo Penta | Method and arrangement for indirectly determining fill characteristics of a fluid tank on a marine vessel |
US20060137428A1 (en) * | 2004-12-29 | 2006-06-29 | Caterpillar Inc. | Engine lubrication system simulating device |
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2009
- 2009-04-21 WO PCT/EP2009/054745 patent/WO2010121650A1/en active Application Filing
Patent Citations (5)
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GB2342721A (en) * | 1998-10-16 | 2000-04-19 | Cummins Engine Co Inc | Calibration of an airflow sensor |
DE10054199A1 (en) * | 2000-11-02 | 2002-05-16 | Siemens Ag | Testing of an airflow meter used with a motor vehicle combustion engine to ensure its correct operation by switching off exhaust gas recirculation and then measuring airflow and comparing it with a stored value |
US20020101373A1 (en) * | 2000-12-08 | 2002-08-01 | Arndt G. Dickey | Measurment system and method |
US20040149003A1 (en) * | 2003-01-31 | 2004-08-05 | Ab Volvo Penta | Method and arrangement for indirectly determining fill characteristics of a fluid tank on a marine vessel |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102353410A (en) * | 2011-06-27 | 2012-02-15 | 清华大学 | Method and device utilizing trace gas to measure air channel volume |
CN102353410B (en) * | 2011-06-27 | 2013-04-17 | 清华大学 | Method and device utilizing trace gas to measure air channel volume |
CN102288263A (en) * | 2011-07-25 | 2011-12-21 | 中国计量学院 | Device for calibrating gas flow meter in pipeline on line |
CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
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