WO2002016883A2 - Method for measuring volume by means of pressure surge determination - Google Patents
Method for measuring volume by means of pressure surge determination Download PDFInfo
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- WO2002016883A2 WO2002016883A2 PCT/EP2001/009716 EP0109716W WO0216883A2 WO 2002016883 A2 WO2002016883 A2 WO 2002016883A2 EP 0109716 W EP0109716 W EP 0109716W WO 0216883 A2 WO0216883 A2 WO 0216883A2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
Definitions
- the invention relates to a method for volume measurement by pressure surge determination, in particular for measuring the capacity in and filling quantities in containers with a complicated internal structure.
- a common problem is determining the capacity of a container with a complicated geometry and / or the amount of a liquid or gas in that container.
- a simple method of determining such capacities is to fill with a liquid and measure the amount of liquid required.
- this method is not always practical, e.g. not if the container is unusually large. If the container is already being used for a specific purpose, it is usually also impossible to carry out this procedure.
- level measurements for liquids have the disadvantage that the level of containers with complicated shapes is not always related to the filling volume in a simple manner or even not clearly.
- Conventional methods under extreme conditions are also problematic, such as accelerations attacking the container during mobile operations or weightlessness.
- the invention is therefore based on the object of providing a method in order to be able to measure gas volumes (and thereby, for example, the capacity of containers) simply and reliably, without the above-mentioned disadvantages occurring.
- a certain amount of a test medium is introduced into the gas-filled space.
- a constant volume of the test medium is assumed; in the method according to claim 3, a gas is used as the test medium and the molar amount of the test gas is assumed to be constant.
- the volume of the space (originally) occupied by the gas can then be determined using a suitable state calibration for the gas.
- the method comprises a step that ensures the restoration of the original state, so that no permanent changes to the system remain due to the measurement.
- state equations such as the van der Waals equation or other state equations specially adapted to the gas type can be used. These are preferably used when the highest possible accuracy is required.
- Another object of the invention is to provide a method with which the filling quantity of a liquid in a container or the volume of a solid in the container can be measured simply and reliably, regardless of the shape of the container.
- a certain amount of a test medium is introduced into the at least partially gas-filled container. Pressure and temperature measurements before and after the introduction of the test medium can then be used to determine the volume of the (originally) space occupied by the gas using a suitable state equation for the gas, and from this in turn the (original) volume occupied by the liquid or solid Volume.
- test liquid The same liquid type that is already in the container is preferably used as the test liquid. If necessary, the easiest way to restore the original state is after measuring. Alternatively, a liquid that does not mix with the original liquid is used as the test liquid. In such a case, the test liquid preferably has a density that differs greatly from the liquid present.
- Another alternative is to use a solid test medium that is not soluble in the liquid.
- the solid test medium is particularly preferably a piston surface which represents a wall of the container, the wall being displaced by moving the piston and the volume of the container thereby being changed.
- the initial and final state can be quickly and reversibly brought about.
- FIG. 1 shows a first application of the method according to the present invention using a test quantity of liquid
- Fig. 2 shows a second application of the method according to the present invention using a test amount of gas.
- the amount of liquid V f present in the container is to be determined by using a test amount of liquid with the test volume ⁇ V:
- the pressure p and the temperature T of the gas are first measured in steps (not shown) in the initial state designated (a).
- a predetermined test volume ⁇ V of liquid is then filled in, whereby it must be avoided that gas or liquid can escape from the container when filling.
- the predetermined value ⁇ V and the measured values p, T, ⁇ p, and ⁇ T can thus be used to calculate the volume occupied by the gas without the number of particles N or the number of moles n of the gas present being required:
- V ⁇ V (p + ⁇ p) T / (T ⁇ p-p ⁇ T).
- V f V 0 - ⁇ V (p + ⁇ p) T / (T ⁇ p-p ⁇ T).
- the amount of liquid V f in the forehead is to be determined by using a test amount of gas with the test mole amount ⁇ n:
- the pressure p and the temperature T of the gas are first measured in steps (not shown) in the initial state designated (a).
- a predetermined test molar quantity ⁇ n of gas is then introduced, it having to be avoided that gas or liquid can escape from the container during the introduction.
- R N A k is the general gas constant, N A is the Avogadro number and k is the Boltzmann constant.
- the predetermined value ⁇ n and the measured values p, T, ⁇ p, and ⁇ T can thus be used to calculate the volume occupied by the gas without to the number of particles N or the number of moles n of the gas originally present is required:
- V ⁇ n RT (T + ⁇ T) / (T ⁇ p- p ⁇ T).
- V, V 0 - ⁇ n RT (T + ⁇ T) / (T ⁇ p- p ⁇ T).
- test gases are therefore preferably used, the solubility of which in the liquid is low or precisely known.
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Verfahren zur Volumenmessung durch Druckstoßbestimmung Method for volume measurement by pressure surge determination
Gebiet der ErfindungField of the Invention
Die Erfindung betrifft ein Verfahren zur Volumenmessung durch Druckstoßbestimmung, insbesondere zur Messung von Fassungsvermögen in und Fülimengen bei Behältern mit komplizierter innerer Struktur.The invention relates to a method for volume measurement by pressure surge determination, in particular for measuring the capacity in and filling quantities in containers with a complicated internal structure.
Stand der TechnikState of the art
Ein häufig auftretendes Problem ist die Bestimmung des Fassungsvermögens eines Behälters mit komplizierter Geometrie und/oder die Füllmenge einer Flüssigkeit oder eines Gases in diesem Behälter.A common problem is determining the capacity of a container with a complicated geometry and / or the amount of a liquid or gas in that container.
Ein einfaches Verfahren zur Bestimmung solcher Fassungsvermögen besteht im Auffüllen mit einer Flüssigkeit und dem Messen der dazu benötigten Menge an Flüssigkeit. Dieses Verfahren ist aber nicht immer praktikabel, so z.B. dann nicht, wenn der Behälter ungewöhnlich groß ist. Wenn der Behälter bereits zu einem bestimmten Zweck verwendet wird, ist es meist ebenfalls unmöglich, dieses Verfahren durchzuführen.A simple method of determining such capacities is to fill with a liquid and measure the amount of liquid required. However, this method is not always practical, e.g. not if the container is unusually large. If the container is already being used for a specific purpose, it is usually also impossible to carry out this procedure.
Aber auch wenn das Fassungsvermögen eines solchen Behälters bekannt ist, können gängige Methoden zur Ermittlung der Füllmengen von im Behälter vorhandenen flüssigen oder gasförmigen Medien nicht immer oder nicht ausreichend genau durchgeführt werden.However, even if the capacity of such a container is known, current methods for determining the filling quantities of liquid or gaseous media present in the container cannot always or not be carried out with sufficient accuracy.
So haben z.B. Pegelmessungen bei Flüssigkeiten den Nachteil, dass bei Behältern mit komplizierten Formen der Pegelstand nicht immer auf einfache Weise oder sogar nicht eindeutig mit dem Füllvolumen zusammenhängt. Ebenfalls problematisch sind herkömmliche Verfahren unter extremen Bedingungen, wie sie am Behälter angreifende Beschleunigungen bei mobilen Einsätzen oder auch die Schwerelosigkeit darstellen.For example, level measurements for liquids have the disadvantage that the level of containers with complicated shapes is not always related to the filling volume in a simple manner or even not clearly. Conventional methods under extreme conditions are also problematic, such as accelerations attacking the container during mobile operations or weightlessness.
Beschreibung der ErfindungDescription of the invention
Der Erfindung liegt demnach die Aufgabe zugrunde, ein Verfahren bereitzustellen, um mit Gas gefüllte Raumvolumina (und dadurch z. B. das Fassungsvermögen von Behältern) einfach und zuverlässig gemessen werden kann, ohne dass die obenerwähnten Nachteile auftreten.The invention is therefore based on the object of providing a method in order to be able to measure gas volumes (and thereby, for example, the capacity of containers) simply and reliably, without the above-mentioned disadvantages occurring.
Diese Aufgabe wird durch die Verfahren mit den Schritten von Anspruch 1 oder 3 gelöst.This object is achieved by the method with the steps of claim 1 or 3.
Gemäß diesen Verfahren wird jeweils eine bestimmte Menge eines Testmediums in den mit Gas gefüllten Raum eingebracht. Im Verfahren nach Anspruch 1 wird hierbei ein konstantes Volumen des Testmediums vorausgesetzt; im Verfahren nach Anspruch 3 wird ein Gas als Testmedium eingesetzt und die Molmenge des Testgases als konstant angenommen. Durch Druck- und Temperaturmessungen vor und nach dem Einbringen des Testmediums lässt sich dann unter Verwendung einer geeigneten Zustandsgieichung für das Gas das Volumen des (ursprünglich) durch das Gas eingenommenen Raumes bestimmen.According to these methods, a certain amount of a test medium is introduced into the gas-filled space. In the method according to claim 1, a constant volume of the test medium is assumed; in the method according to claim 3, a gas is used as the test medium and the molar amount of the test gas is assumed to be constant. Through pressure and temperature measurements before and after the introduction of the test medium, the volume of the space (originally) occupied by the gas can then be determined using a suitable state calibration for the gas.
Werden die Messungen der Änderungen der Zustandsgrößen unmittelbar nach der Zustandsänderung durchgeführt, so kann ein Wärmeaustausch mit der Umgebung vernachlässigt und eine adiabatische Zustandsänderung angenommen werden. Bei guter thermischer Isolation des Systems ist dagegen nicht unbedingt erforderlich, dass die Messungen schnellstmöglich nach der Zustandsänderung durchgeführt werden. Gemäß einer bevorzugten Weiterbildung umfasst das Verfahren einen Schritt, der die Wiederherstellung des ursprünglichen Zustands gewährleistet, so dass durch die Messung keine bleibenden Änderungen am System zurückbleiben.If the changes in the state variables are measured immediately after the state change, heat exchange with the surroundings can be neglected and an adiabatic state change can be assumed. With good thermal insulation of the system, on the other hand, it is not absolutely necessary for the measurements to be carried out as quickly as possible after the change in state. According to a preferred development, the method comprises a step that ensures the restoration of the original state, so that no permanent changes to the system remain due to the measurement.
Bevorzugt wird als Gasgleichung die Ideale Gasgleichung, pV=nRT, verwendet. Diese Gleichung ist die einfachste Zustandsgieichung für Gase, wodurch sich damit ein geringerer Rechenaufwand als mit anderen Zustandsgieichungen verbunden ist.The ideal gas equation, pV = nRT, is preferably used as the gas equation. This equation is the simplest state equation for gases, which means that it requires less computation effort than other state equations.
Alternativ hierzu können speziell an die Gasart angepasste Zustandsgieichungen wie die van-der-Waals-Gleichung oder andere Zustandsgieichungen verwendet werden. Diese werden vorzugsweise dann eingesetzt, wenn eine möglichst hohe Genauigkeit erforderlich ist.Alternatively, state equations such as the van der Waals equation or other state equations specially adapted to the gas type can be used. These are preferably used when the highest possible accuracy is required.
Ferner liegt der Erfindung die Aufgabe zugrunde, ein Verfahren bereitzustellen, mit dem die Füllmenge einer Flüssigkeit in einem Behälter oder das Volumen eines im Behälter befindlichen Feststoffes unabhängig von der Form des Behälters einfach und zuverlässig gemessen werden können.Another object of the invention is to provide a method with which the filling quantity of a liquid in a container or the volume of a solid in the container can be measured simply and reliably, regardless of the shape of the container.
Diese Aufgabe wird durch das Verfahren mit den Schritten des Anspruchs 6 gelöst.This object is achieved by the method with the steps of claim 6.
Gemäß diesen Verfahren wird jeweils eine bestimmte Menge eines Testmediums in den wenigstens teilweise mit Gas gefüllten Behälter eingebracht. Durch Druck- und Temperaturmessungen vor und nach dem Einbringen des Testmediums lässt sich dann unter Verwendung einer geeigneten Zustandsgieichung für das Gas das Volumen des (ursprünglich) durch das Gas eingenommenen Raumes bestimmen, und daraus wiederum das (ursprüngliche) von der Flüssigkeit oder dem Feststoff eingenommene Volumen.According to these methods, a certain amount of a test medium is introduced into the at least partially gas-filled container. Pressure and temperature measurements before and after the introduction of the test medium can then be used to determine the volume of the (originally) space occupied by the gas using a suitable state equation for the gas, and from this in turn the (original) volume occupied by the liquid or solid Volume.
Bevorzugt wird als Testflüssigkeit dieselbe Flüssigkeitsart verwendet, die sich schon im Behälter befindet. Somit kann - falls notwendig - nach dem Messen der ursprüngliche Zustand am einfachsten wieder hergestellt werden. Alternativ wird als Testflüssigkeit eine Flüssigkeit verwendet die sich mit der ursprünglichen Flüssigkeit nicht mischt. Bevorzugt hat die Testflüssigkeit in einem solchen Fall eine von der vorhandenen Flüssigkeit stark abweichende Dichte.The same liquid type that is already in the container is preferably used as the test liquid. If necessary, the easiest way to restore the original state is after measuring. Alternatively, a liquid that does not mix with the original liquid is used as the test liquid. In such a case, the test liquid preferably has a density that differs greatly from the liquid present.
Eine andere Alternative besteht in der Verwendung eines festen, in der Flüssigkeit nicht auflösbaren Testmediums.Another alternative is to use a solid test medium that is not soluble in the liquid.
Besonders bevorzugt ist das feste Testmedium ein eine Wand des Behälters darstellende Kolbenfläche sein, wobei durch Bewegen des Kolbens die Wand verschoben und dadurch das Volumen des Behälters verändert wird. In einem solchen Fall können Anfangs- und Endzustand problemlos schnell und reversibel herbeigeführt werden.The solid test medium is particularly preferably a piston surface which represents a wall of the container, the wall being displaced by moving the piston and the volume of the container thereby being changed. In such a case, the initial and final state can be quickly and reversibly brought about.
Im folgenden werden zwei Anwendungen des erfindungsgemäßen Verfahrens unter Bezugnahme auf die beigefügten Zeichnungen erläutert. Dabei zeigen:In the following two applications of the method according to the invention are explained with reference to the accompanying drawings. Show:
Fig. 1 eine erste Anwendung des Verfahrens gemäß der vorliegenden Erfindung unter der Verwendung einer Testmenge von Flüssigkeit;1 shows a first application of the method according to the present invention using a test quantity of liquid;
Fig. 2 eine zweite Anwendung des Verfahrens gemäß der vorliegenden Erfindung unter der Verwendung einer Testmenge von Gas.Fig. 2 shows a second application of the method according to the present invention using a test amount of gas.
Beide in den Figuren gezeigten Anwendungsbeispiele dienen zur Erläuterung des erfindungsgemäßen Verfahrens bei der Bestimmung der Flüssigkeitsmenge Vf in einem Behälter mit bekanntem Volumen V0, dessen restliches Volumen V durch ein Gas eingenommen wird.Both application examples shown in the figures serve to explain the method according to the invention when determining the amount of liquid V f in a container with a known volume V 0 , the remaining volume V of which is taken up by a gas.
In Fig. 1 soll die im Behälter vorhanden Flüssigkeitsmenge Vf durch Verwendung einer Testmenge Flüssigkeit mit dem Testvolumen ΔV ermittelt werden: In nicht gezeigten Schritten wird hierzu zunächst im mit (a) bezeichneten Ausgangszustand der Druck p die Temperatur T des Gases gemessen.In FIG. 1, the amount of liquid V f present in the container is to be determined by using a test amount of liquid with the test volume ΔV: For this purpose, the pressure p and the temperature T of the gas are first measured in steps (not shown) in the initial state designated (a).
Danach wird ein vorbestimmtes Testvolumen ΔV an Flüssigkeit eingefüllt, wobei vermieden werden muss, dass beim Einfüllen Gas oder Flüssigkeit aus dem Behälter entweichen kann.A predetermined test volume ΔV of liquid is then filled in, whereby it must be avoided that gas or liquid can escape from the container when filling.
Im dadurch resultierenden und mit (b) bezeichneten Zustand ist das durch die Flüssigkeit verdrängte Volumen um ΔV größer, während der durch das Gas eingenommene Raum um den gleichen Betrag verringert wird.In the resultant state denoted by (b), the volume displaced by the liquid is larger by ΔV, while the space occupied by the gas is reduced by the same amount.
Da bei dieser Zustandsänderung die Teilchenzahl N und somit die Molzahl n=N/NA (NA ist die Avogadro-Zahl) des Gases unverändert bleiben, gilt z.B. unter Verwendung der Idealen Gasgleichung für die beiden Zustände:Since in this state change the number of particles N, and thus the molar number n = N / N A (N A is Avogadro's number) remain unchanged the gas, for example, is considered by using the ideal gas equation for the two states:
(a) pV=nRT(a) pV = nRT
(b) (p+Δp)(V-ΔV)=nR(T+ΔT),(b) (p + Δp) (V-ΔV) = nR (T + ΔT),
wobei R=NAk die Allgemeine Gaskonstante und k die Boltzmann-Konstante ist.where R = N A k is the general gas constant and k is the Boltzmann constant.
Somit lässt sich mit dem vorbestimmten Wert ΔV und den gemessenen Werten p, T, Δp, und ΔT das durch das Gas eingenommene Volumen berechnen, ohne dass hierzu die Teilchenzahl N bzw. die Molzahl n des vorhandenen Gases benötigt wird:The predetermined value ΔV and the measured values p, T, Δp, and ΔT can thus be used to calculate the volume occupied by the gas without the number of particles N or the number of moles n of the gas present being required:
V=ΔV (p+Δp)T/(TΔp-pΔT).V = ΔV (p + Δp) T / (TΔp-pΔT).
Das ursprüngliche Flüssigkeitsvolumen ergibt sich aus Vf = V0-V zu:The original liquid volume results from V f = V 0 -V:
Vf = V0-ΔV (p+Δp)T/(TΔp-pΔT). Unter Umständen muss bei dem beschriebenen Verfahren berücksichtigt werten, dass eine endlicher Teil des Gases in der Testflüssigkeit gelöst wird. Bevorzugt werden deshalb Testflüssigkeiten verwendet, bei denen die Löslichkeit des Gases gering oder genau bekannt ist. Dasselbe trifft auch auf feste Testmedien zu.V f = V 0 -ΔV (p + Δp) T / (TΔp-pΔT). Under certain circumstances, the method described must take into account that a finite part of the gas is dissolved in the test liquid. Test liquids are therefore preferably used in which the solubility of the gas is low or precisely known. The same applies to solid test media.
In Fig. 2 soll die im Behälter Vorhände Flüssigkeitsmenge Vf durch Verwendung einer Testmenge von Gas mit der Testmolmenge Δn ermittelt werden:In FIG. 2 the amount of liquid V f in the forehead is to be determined by using a test amount of gas with the test mole amount Δn:
In nicht gezeigten Schritten wird hierzu zunächst im mit (a) bezeichneten Ausgangszustand der Druck p die Temperatur T des Gases gemessen.For this purpose, the pressure p and the temperature T of the gas are first measured in steps (not shown) in the initial state designated (a).
Danach wird eine vorbestimmte Testmolmenge Δn an Gas eingebracht, wobei vermieden werden muss, dass beim Einbringen Gas oder Flüssigkeit aus dem Behälter entweichen kann.A predetermined test molar quantity Δn of gas is then introduced, it having to be avoided that gas or liquid can escape from the container during the introduction.
Im dadurch resultierenden und mit (b) bezeichneten Zustand ist die Gesamtmolmenge an Gas Δn größer, während die durch Gas und Flüssigkeit eingenommenen Volumina unverändert bleiben.In the resultant state denoted by (b), the total molar amount of gas Δn is greater, while the volumes occupied by gas and liquid remain unchanged.
Da bei dieser Zustandsänderung das Gasvolumen V unverändert bleibt, gilt z.B. unter Verwendung der Idealen Gasgleichung für die beiden Zustände:Since the gas volume V remains unchanged with this change in state, e.g. using the ideal gas equation for the two states:
(a) pV=nRT(a) pV = nRT
(b) (p+Δp)V=(n+Δn)R(T+ΔT),(b) (p + Δp) V = (n + Δn) R (T + ΔT),
wobei R=NAk die Allgemeine Gaskonstante, NA die Avogadro-Zahl und k die Boltz- mann-Konstante ist.where R = N A k is the general gas constant, N A is the Avogadro number and k is the Boltzmann constant.
Somit lässt sich mit dem vorbestimmten Wert Δn und den gemessenen Werten p, T, Δp, und ΔT das durch das Gas eingenommene Volumen berechnen, ohne dass hier- zu die Teilchenzahl N bzw. die Molzahl n des ursprünglich vorhandenen Gases benötigt wird:The predetermined value Δn and the measured values p, T, Δp, and ΔT can thus be used to calculate the volume occupied by the gas without to the number of particles N or the number of moles n of the gas originally present is required:
V=Δn RT(T+ΔT)/(TΔp- pΔT).V = Δn RT (T + ΔT) / (TΔp- pΔT).
Das ursprüngliche Flüssigkeitsvolumen ergibt sich aus Vf = V0-V zu:The original liquid volume results from V f = V 0 -V:
V, = V0-Δn RT(T+ΔT)/(TΔp- pΔT).V, = V 0 -Δn RT (T + ΔT) / (TΔp- pΔT).
Unter Umständen muss bei dem beschriebenen Verfahren berücksichtigt werten, dass eine endlicher Teil des Testgases in der Flüssigkeit gelöst wird. Bevorzugt werden deshalb Testgase verwendet, deren Löslichkeit in der Flüssigkeit gering oder genau bekannt ist. Under certain circumstances, the method described must take into account that a finite part of the test gas is dissolved in the liquid. Test gases are therefore preferably used, the solubility of which in the liquid is low or precisely known.
Claims
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| Application Number | Priority Date | Filing Date | Title |
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| AU2001291791A AU2001291791A1 (en) | 2000-08-22 | 2001-08-22 | Method for measuring volume by means of pressure surge determination |
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| Application Number | Priority Date | Filing Date | Title |
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| DE2000141051 DE10041051B4 (en) | 2000-08-22 | 2000-08-22 | Method for volume measurement by pressure shock determination |
| DE10041051.0 | 2000-08-22 |
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| WO2002016883A2 true WO2002016883A2 (en) | 2002-02-28 |
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| DE3540768C1 (en) * | 1985-11-16 | 1987-04-16 | Walter Nicolai | Method and device for determining and displaying the amount of a liquid or solid storage item |
| JPS62237323A (en) * | 1986-04-09 | 1987-10-17 | Fujita Corp | Measuring instrument for amount of particles stored in particle storage silo |
| SE8702101L (en) * | 1987-05-21 | 1988-11-22 | Metator Kb | SET AND DEVICE FOR Saturation of the volume of a gas in a container |
| DE3913096A1 (en) * | 1989-04-21 | 1990-10-25 | Moto Meter Ag | Measuring liquid quantity in container, esp. vehicle fuel tank - from periodic press change in gas above liquid which periodically varying its vol with pump |
| JPH05288588A (en) * | 1992-04-14 | 1993-11-02 | Mitsubishi Heavy Ind Ltd | Volume and leakage quantity measuring device |
| US5410908A (en) * | 1993-12-20 | 1995-05-02 | Data Instruments, Inc. | Measuring the quantity of a gas in a tank |
| DE4420950A1 (en) * | 1994-06-20 | 1995-12-21 | Walter Nicolai | System for activating displacement mechanism in sealed storage vessel |
| JP3488013B2 (en) * | 1996-04-16 | 2004-01-19 | 矢崎総業株式会社 | Fuel tank fuel level measurement device |
| DE19651252A1 (en) * | 1996-12-10 | 1998-06-18 | Hamilton Bonaduz Ag | Method and device for determining the volume of a gas and / or the volume of a sample of solid and / or liquid material |
-
2000
- 2000-08-22 DE DE2000141051 patent/DE10041051B4/en not_active Expired - Fee Related
-
2001
- 2001-08-22 WO PCT/EP2001/009716 patent/WO2002016883A2/en not_active Ceased
- 2001-08-22 AU AU2001291791A patent/AU2001291791A1/en not_active Abandoned
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004092690A1 (en) * | 2003-04-16 | 2004-10-28 | Australian Nuclear Science & Technology Organisation | Determining gas volume, porosity, and intrinsic oxidation rate |
| CN1325882C (en) * | 2004-06-01 | 2007-07-11 | 上海市公用事业研究所 | Computer gas volume metering method and device for natural gas fuel cylinder of vehicle |
| CN1332185C (en) * | 2005-04-27 | 2007-08-15 | 中国科学院金属研究所 | Precision calibrating method of container volume |
| JP2007162849A (en) * | 2005-12-14 | 2007-06-28 | Toyota Motor Corp | Liquid hydrogen tank remaining amount detection system |
| EP1965121A4 (en) * | 2005-12-14 | 2009-07-29 | Toyota Motor Co Ltd | SYSTEM FOR DETERMINING THE RESIDUAL QUANTITY FOR A LIQUID HYDROGEN RESERVOIR |
| US8315824B2 (en) | 2005-12-14 | 2012-11-20 | Toyota Jidosha Kabushiki Kaisha | System for detecting remaining quantity in liquid hydrogen tank |
| WO2007110825A3 (en) * | 2006-03-29 | 2007-12-13 | Koninkl Philips Electronics Nv | Fluid processing and volume determination system |
| US9846068B2 (en) | 2012-04-27 | 2017-12-19 | Airbus Operations Limited | Measuring the volume of fluid in a vessel |
| CN103323072A (en) * | 2013-06-26 | 2013-09-25 | 重庆大唐国际武隆水电开发有限公司 | Method and system for calculating total oil quantity of oil storage system |
| WO2017008853A1 (en) * | 2015-07-15 | 2017-01-19 | Hewlett-Packard Development Company, L.P. | Determining a volume of gas inside a liquid supply system |
| US10739180B2 (en) | 2015-07-15 | 2020-08-11 | Hewlett-Packard Development Company, L.P. | Determining a volume of gas inside a liquid supply system |
| CN106441486A (en) * | 2015-08-05 | 2017-02-22 | 波音公司 | Methods and systems for direct fuel quantity measurement |
| EP3128298A1 (en) * | 2015-08-05 | 2017-02-08 | The Boeing Company | Methods and systems for direct fuel quantity measurement |
| US10060781B2 (en) | 2015-08-05 | 2018-08-28 | The Boeing Company | Methods and systems for direct fuel quantity measurement |
| WO2018146127A1 (en) * | 2017-02-08 | 2018-08-16 | Manuel Bernroitner | Method and device for placing a fill line on a vessel |
| CN112197831A (en) * | 2020-10-23 | 2021-01-08 | 中国计量大学 | Method for measuring irregular large volume by using gas state change method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10041051B4 (en) | 2006-08-10 |
| WO2002016883A3 (en) | 2002-06-06 |
| DE10041051A1 (en) | 2002-03-21 |
| AU2001291791A1 (en) | 2002-03-04 |
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