DE102012217891A1 - Method for determining fill level of fuel in fuel tank mounted in motor vehicle, involves determining fill level of tank from propagation time of ultrasonic signal and inclination angle of tank based on intensities of ultrasonic signal - Google Patents
Method for determining fill level of fuel in fuel tank mounted in motor vehicle, involves determining fill level of tank from propagation time of ultrasonic signal and inclination angle of tank based on intensities of ultrasonic signal Download PDFInfo
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- DE102012217891A1 DE102012217891A1 DE201210217891 DE102012217891A DE102012217891A1 DE 102012217891 A1 DE102012217891 A1 DE 102012217891A1 DE 201210217891 DE201210217891 DE 201210217891 DE 102012217891 A DE102012217891 A DE 102012217891A DE 102012217891 A1 DE102012217891 A1 DE 102012217891A1
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- tank
- ultrasonic signal
- ultrasonic
- intensity
- fill level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/80—Arrangements for signal processing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/80—Arrangements for signal processing
- G01F23/802—Particular electronic circuits for digital processing equipment
- G01F23/804—Particular electronic circuits for digital processing equipment containing circuits handling parameters other than liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/86—Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
- B60K2015/03217—Fuel level sensors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Füllstandsbestimmung eines Tanks der in einem Kraftfahrzeug angeordnet ist. Weiterhin betrifft die vorliegende Erfindung ein Computerprogramm, das alle Schritte des erfindungsgemäßen Verfahrens ausführt, wenn es auf einem Rechengerät abläuft. Schließlich betrifft die vorliegende Erfindung ein Computerprogrammprodukt mit Programmcode, der auf einem maschinenlesbaren Träger gespeichert ist, zur Durchführung des erfindungsgemäßen Verfahrens, wenn das Programm auf einem Rechengerät ausgeführt wird.The present invention relates to a method for level determination of a tank which is arranged in a motor vehicle. Furthermore, the present invention relates to a computer program that performs all the steps of the inventive method when it runs on a computing device. Finally, the present invention relates to a computer program product with program code, which is stored on a machine-readable carrier, for carrying out the method according to the invention when the program is executed on a computing device.
Stand der TechnikState of the art
Um die immer strengeren Abgasgesetzgebungen zu erfüllen, ist es notwendig, Stickoxide (NOx) im Abgas von Verbrennungskraftmaschinen, insbesondere von Dieselmotoren, zu verringern. Hierzu ist es bekannt, im Abgasbereich von Brennkraftmaschinen einen SCR-Katalysator (Selective Catalytic Reduction) anzuordnen, der dem Abgas der Verbrennungskraftmaschine enthaltene Stickoxide in Gegenwart eines Reduktionsmittels zu Stickstoff reduziert. Hierdurch kann der Anteil von Stickoxid im Abgas erheblich verringert werden. Für den Ablauf dieser Reaktion wird Ammoniak (NH3) benötigt, das dem Abgas zugemischt wird. Als Reduktionsmittel werden daher NH3 bzw. NH3-abspaltende Reagenzien eingesetzt. In der Regel wird hierfür eine wässrige Harnstofflösung (Harnstoffwasserlösung) verwendet, die vor dem SCR-Katalysator im Abgasstrang eingespritzt wird. Aus dieser Lösung bildet sich Ammoniak, das als Reduktionsmittel wirkt. Eine 32,5 %ige wässrige Harnstofflösung ist unter dem Markennamen AdBlue® kommerziell erhältlich.In order to meet the increasingly stringent exhaust gas legislation, it is necessary to reduce nitrogen oxides (NOx) in the exhaust gas of internal combustion engines, especially diesel engines. For this purpose, it is known to arrange an SCR catalyst (Selective Catalytic Reduction) in the exhaust area of internal combustion engines, which reduces the nitrogen oxides contained in the exhaust gas of the internal combustion engine in the presence of a reducing agent to nitrogen. As a result, the proportion of nitrogen oxide in the exhaust gas can be significantly reduced. For the course of this reaction ammonia (NH 3 ) is required, which is admixed to the exhaust gas. As reducing agents therefore NH 3 or NH 3 -splitting reagents are used. As a rule, an aqueous urea solution (urea-water solution) is used for this, which is injected in the exhaust gas line upstream of the SCR catalytic converter. From this solution forms ammonia, which acts as a reducing agent. A 32.5% aqueous urea solution is commercially available under the trade name AdBlue ®.
Um für den Betrieb der Verbrennungskraftmaschine ausreichend Reduktionsmittel bereitstellen zu können, ist ein Tank zur Bevorratung der Harnstoffwasserlösung vorgesehen. Der Füllstand in diesem Tank muss überwacht werden. Auch der Füllstand in anderen Tanks eines Kraftfahrzeugs, wie beispielsweise dem Kraftstofftank, bedarf einer Überwachung.In order to provide sufficient reducing agent for the operation of the internal combustion engine, a tank for storing the urea water solution is provided. The level in this tank must be monitored. The level in other tanks of a motor vehicle, such as the fuel tank, requires monitoring.
Eine weit verbreitete Methode um den Füllstand eines mit einer Flüssigkeit gefüllten Tanks zu bestimmen besteht darin, die Laufzeit eines Ultraschallimpulses zur Flüssigkeitsoberfläche und zurück zu messen. Dabei können ein Ultraschallsender und ein Ultraschallempfänger entweder am Tankboden oder an der Tankoberseite befestigt sein. Eine Neigung des Tankes kann allerdings zu einer Verfälschung des so bestimmten Füllstandes führen. Eine Neigung des Tanks führt dazu, dass keine senkrechte Reflexion des Ultraschallsignals an der Flüssigkeitsoberfläche zurück zum Ultraschallempfänger erfolgt. Dies resultiert in einer vergrößerten Laufstrecke und Laufzeit des Ultraschallsignals. Dieser Effekt ist dann besonders ausgeprägt, wenn der Ultraschallsender und der Ultraschallempfänger nicht unterhalb des Flächenschwerpunkts der Flüssigkeitsoberfläche angeordnet sind. Dies kann beispielsweise aufgrund der Tankgeometrie notwendig werden, da der Füllstand stets an dem ort der größten Tankhöhe gemessen werden muss.A widely used method for determining the level of a tank filled with a liquid is to measure the transit time of an ultrasonic pulse to the liquid surface and back. In this case, an ultrasonic transmitter and an ultrasonic receiver can be mounted either on the tank bottom or on the tank top. However, an inclination of the tank can lead to a falsification of the level thus determined. A tilt of the tank causes no vertical reflection of the ultrasonic signal on the liquid surface back to the ultrasonic receiver. This results in an increased running distance and transit time of the ultrasonic signal. This effect is particularly pronounced when the ultrasonic transmitter and the ultrasonic receiver are not arranged below the centroid of the liquid surface. This may be necessary, for example, because of the tank geometry, since the level always has to be measured at the location of the largest tank height.
Offenbarung der ErfindungDisclosure of the invention
Das Verfahren zur Füllstandsbestimmung eines Tanks der in einem Kraftfahrzeug angeordnet ist umfasst das Aussenden eines Ultraschallsignals durch einen Ultraschallsender, die Reflexion des Ultraschallsignals an der Oberfläche einer in dem Tank enthaltenen Flüssigkeit zurück auf einen Ultraschallempfänger, das Messen der Laufzeit des Ultraschallsignals und der Intensität des empfangenen Ultraschallsignals, das Berechnen eines Neigungswinkels des Tanks aus der Intensität des ausgesandten Ultraschallsignals und der Intensität des empfangenen Ultraschallsignals, und das Berechnen des Füllstandes des Tanks aus der Laufzeit des Ultraschallsignals und dem Neigungswinkel des Tank. Aufgrund der Informationen über den Neigungswinkel können verfälschte Messungen erkannt und in der Berechnung des Füllstandes verworfen werden. Dadurch wird das Ergebnis einer zeitlich gemittelten Füllstandsmessung verbessert.The method for level determination of a tank which is arranged in a motor vehicle comprises emitting an ultrasonic signal by an ultrasonic transmitter, the reflection of the ultrasonic signal on the surface of a liquid contained in the tank back to an ultrasonic receiver, measuring the transit time of the ultrasonic signal and the intensity of the received Ultrasonic signal, calculating an inclination angle of the tank from the intensity of the emitted ultrasonic signal and the intensity of the received ultrasonic signal, and calculating the level of the tank from the transit time of the ultrasonic signal and the inclination angle of the tank. Due to the information about the tilt angle, falsified measurements can be detected and discarded in the calculation of the fill level. This improves the result of time-averaged level measurement.
Bevorzugt wird eine zeitliche Variation der Intensität des empfangenen Ultraschallsignals erfasst und aus dieser zeitlichen Variation bestimmt, ob die Intensität des empfangenen Ultraschallsignals durch andere Einflüsse als den Neigungswinkel des Tanks beeinflusst wird. Es ist besonders bevorzugt dass die auf diese Weise erkannten anderen Einflüsse dann durch Filter oder Ähnlichkeitsbetrachtungen aus der Berechnung des Neigungswinkels des Tanks ausgeschlossen werden. Bei mindestens einem der anderen Einflüsse handelt es sich insbesondere um Beschleunigungen des Kraftfahrzeugs, Fahrbahnunebenheiten oder Vibrationen am Tank. Jeder dieser Einflüsse kann zu einer Bewegung der Flüssigkeitsoberfläche und damit zu einer Verfälschung der Füllstandsberechnung führen.Preferably, a temporal variation of the intensity of the received ultrasound signal is detected and it is determined from this temporal variation whether the intensity of the received ultrasound signal is influenced by influences other than the inclination angle of the tank. It is particularly preferred that the other influences recognized in this way are then excluded by filters or similarity considerations from the calculation of the inclination angle of the tank. At least one of the other influences is, in particular, accelerations of the motor vehicle, uneven road surfaces or vibrations on the tank. Each of these influences can lead to a movement of the liquid surface and thus to a falsification of the level calculation.
Vorzugsweise fungiert ein Ultraschallwandler als Ultraschallsender und als Ultraschallempfänger, um die Funktionen von Sender und Empfänger in einem Bauteil zu vereinen.Preferably, an ultrasonic transducer acts as an ultrasonic transmitter and as an ultrasonic receiver to combine the functions of transmitter and receiver in one component.
Das erfindungsgemäße Verfahren kann von einem Computerprogramm ausgeführt werden, wenn es auf einem Rechengerät abläuft. Dies ermöglicht es beispielsweise, das Verfahren in das Steuergerät eines Kraftfahrzeugs zu implementieren, ohne daran bauliche Veränderungen vornehmen zu müssen. Erfindungsgemäß ist außerdem ein Computerprogrammprodukt mit Programmcode vorgesehen, das auf einem maschinenlesbaren Träger gespeichert ist, zur Durchführung dieses Verfahrens, wenn das Programm auf einem Computer oder einem Steuergerät ausgeführt wird, insbesondere auf einem gemeinsamen Steuergerät des ersten Ultraschallwandlers und des zweiten Ultraschallwandlers.The inventive method can be executed by a computer program when it runs on a computing device. This makes it possible, for example, to implement the method in the control unit of a motor vehicle without having to make structural changes. The invention also provides a computer program product with program code, which is stored on a machine-readable carrier, for carrying out this method when the program is executed on a computer or a control unit, in particular on a common control unit of the first ultrasonic transducer and the second ultrasonic transducer.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Ausführungsformen der ErfindungEmbodiments of the invention
In einer Ausführungsform des erfindungsgemäßen Verfahrens wird die Intensität I22 des empfangenen Ultraschallsignals
In einer weiteren Ausführungsform der Erfindung wird zusätzlich eine zeitliche Variation der Intensität I22 des empfangenen Ultraschallsignals
Das Verfahren gemäß den voranstehend beschriebenen Ausführungsformen der Erfindung kann als Computerprogramm in einem Steuergerät des Kraftfahrzeugs implementiert werden. Hierzu kann es von einem Datenträger auf das Steuergerät überspielt werden, so dass keine baulichen Änderungen am Steuergerät notwenig werden.The method according to the embodiments of the invention described above can be implemented as a computer program in a control unit of the motor vehicle. For this purpose, it can be dubbed by a disk on the control unit, so that no structural changes to the control unit are necessary.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210217891 DE102012217891A1 (en) | 2012-10-01 | 2012-10-01 | Method for determining fill level of fuel in fuel tank mounted in motor vehicle, involves determining fill level of tank from propagation time of ultrasonic signal and inclination angle of tank based on intensities of ultrasonic signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210217891 DE102012217891A1 (en) | 2012-10-01 | 2012-10-01 | Method for determining fill level of fuel in fuel tank mounted in motor vehicle, involves determining fill level of tank from propagation time of ultrasonic signal and inclination angle of tank based on intensities of ultrasonic signal |
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DE102012217891A1 true DE102012217891A1 (en) | 2014-04-03 |
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DE201210217891 Withdrawn DE102012217891A1 (en) | 2012-10-01 | 2012-10-01 | Method for determining fill level of fuel in fuel tank mounted in motor vehicle, involves determining fill level of tank from propagation time of ultrasonic signal and inclination angle of tank based on intensities of ultrasonic signal |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014016190A1 (en) | 2014-11-03 | 2016-05-04 | Audi Ag | Method for operating a fuel tank device for a motor vehicle and corresponding fuel tank device |
CN105675073A (en) * | 2014-12-03 | 2016-06-15 | 韩国自动车部品株式会社 | Flow rate measuring device and method capable of correcting gradient |
WO2017143561A1 (en) * | 2016-02-25 | 2017-08-31 | 吴伟民 | Method and system for vehicle oil volume detection |
FR3069495A1 (en) * | 2017-07-31 | 2019-02-01 | Plastic Omnium Advanced Innovation And Research | SYSTEM FOR MEASURING A PARAMETER OF A FLUID IN A RESERVOIR. |
CN111504419A (en) * | 2020-06-04 | 2020-08-07 | 浙江大学 | Device and method for measuring liquid medicine amount of plant protection unmanned aerial vehicle |
-
2012
- 2012-10-01 DE DE201210217891 patent/DE102012217891A1/en not_active Withdrawn
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014016190A1 (en) | 2014-11-03 | 2016-05-04 | Audi Ag | Method for operating a fuel tank device for a motor vehicle and corresponding fuel tank device |
CN105564226A (en) * | 2014-11-03 | 2016-05-11 | 奥迪股份公司 | Method for operating a fuel tank device for a motor vehicle and corresponding fuel tank device |
US9919594B2 (en) | 2014-11-03 | 2018-03-20 | Audi Ag | Method for operating a fuel tank system for an automobile and corresponding fuel tank system |
DE102014016190B4 (en) | 2014-11-03 | 2018-09-20 | Audi Ag | Method for operating a fuel tank device for a motor vehicle and corresponding fuel tank device |
CN105675073A (en) * | 2014-12-03 | 2016-06-15 | 韩国自动车部品株式会社 | Flow rate measuring device and method capable of correcting gradient |
WO2017143561A1 (en) * | 2016-02-25 | 2017-08-31 | 吴伟民 | Method and system for vehicle oil volume detection |
FR3069495A1 (en) * | 2017-07-31 | 2019-02-01 | Plastic Omnium Advanced Innovation And Research | SYSTEM FOR MEASURING A PARAMETER OF A FLUID IN A RESERVOIR. |
WO2019025300A1 (en) * | 2017-07-31 | 2019-02-07 | Plastic Omnium Advanced Innovation And Research | System for measuring a parameter of a fluid in a tank |
CN110944864A (en) * | 2017-07-31 | 2020-03-31 | 全耐塑料高级创新研究公司 | Measuring system for measuring parameters of a fluid in a tank |
US10775348B2 (en) | 2017-07-31 | 2020-09-15 | Plastic Omnium Advanced Innovation And Research | System for measuring a parameter of a fluid in a tank |
CN110944864B (en) * | 2017-07-31 | 2021-02-09 | 全耐塑料高级创新研究公司 | Measuring system for measuring parameters of a fluid in a tank |
CN111504419A (en) * | 2020-06-04 | 2020-08-07 | 浙江大学 | Device and method for measuring liquid medicine amount of plant protection unmanned aerial vehicle |
CN111504419B (en) * | 2020-06-04 | 2021-05-11 | 浙江大学 | Device and method for measuring liquid medicine amount of plant protection unmanned aerial vehicle |
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