DE10312102B4 - Device for measuring a level of a liquid in a container - Google Patents
Device for measuring a level of a liquid in a container Download PDFInfo
- Publication number
- DE10312102B4 DE10312102B4 DE10312102.1A DE10312102A DE10312102B4 DE 10312102 B4 DE10312102 B4 DE 10312102B4 DE 10312102 A DE10312102 A DE 10312102A DE 10312102 B4 DE10312102 B4 DE 10312102B4
- Authority
- DE
- Germany
- Prior art keywords
- container
- guide channel
- sound guide
- liquid
- sound
- 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 - Fee Related
Links
Images
Classifications
-
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Vorrichtung zur Messung eines Füllstandes einer Flüssigkeit (4) in einem Behälter (1) mit einem Behälterboden, mit einem Schallführungskanal (2) und mit wenigstens einem nahe einem Ende des Schallführungskanals (2) angeordneten Ultraschallwandler (3) zur Erzeugung von Ultraschallimpulsen und zum Empfangen der im wandler zur Erzeugung von Ultraschallimpulsen und zum Empfangen der im Bereich eines Flüssigkeitsspiegels im Schallführungskanal (2) reflektierten Ultraschallimpulse, wobei der Schallführungskanal (2) außerhalb des Behälters (1) angeordnet ist, und wobei ein Austausch der Flüssigkeit (4) im Schallführungskanal (2) über einen Verbindungskanal (16) zumindest mittelbar mit der Flüssigkeit (4) im Behälter (1) stattfindet, und wobei eine ein Förderaggregat (10) zur Förderung von Flüssigkeit (4) aus dem Behälter (1) umfassende Förderleitung (9) an dem Behälter (1) angeschlossen ist, und wobei der Verbindungskanal (16) den Schallführungskanal (2) mit der Förderleitung (9) verbindet, wobei der Verbindungskanal (16) an einer Öffnung in der oberen Seitenwandung der Förderleitung (9) endet und die Förderleitung an einer der Öffnung gegenüberliegenden unteren Seitenwandung eine nach unten gerichtete Ausbuchtung (28) aufweist, so daß der Querschnitt der Förderleitung (9) im Bereich des Verbindungskanals (16) durch die Ausbuchtung (28) vergrößert ist.Device for measuring a level of a liquid (4) in a container (1) with a container bottom, with a sound guide channel (2) and with at least one near the end of the sound guide channel (2) arranged ultrasonic transducer (3) for generating ultrasonic pulses and for receiving in the transducer for generating ultrasonic pulses and for receiving in the region of a liquid level in the sound guide channel (2) reflected ultrasonic pulses, wherein the sound guide channel (2) outside the container (1) is arranged, and wherein an exchange of the liquid (4) in the sound guide channel ( 2) via a connecting channel (16) at least indirectly with the liquid (4) in the container (1), and wherein a delivery unit (10) for conveying liquid (4) from the container (1) comprising the delivery line (9) the container (1) is connected, and wherein the connecting channel (16) the sound guide channel (2) with the conveyor line (9) connects, wherein the connecting channel (16) terminates at an opening in the upper side wall of the conveying line (9) and the conveying line on a side opposite the opening lower side wall has a downwardly directed recess (28), so that the cross section of Delivery line (9) in the region of the connecting channel (16) through the bulge (28) is increased.
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zur Messung eines Füllstandes nach der Gattung des Hauptanspruchs. Es ist schon eine Vorrichtung zur Messung eines Füllstandes aus der
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung zur Messung eines Füllstandes mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß auf einfache Art und Weise eine Verbesserung dahingehend erzielt wird, daß eine Beschädigung des Schallführungskanals bei Temperaturen unterhalb des Gefrierpunktes der Flüssigkeit vermieden wird, indem der Schallführungskanal außerhalb des Behälters angeordnet ist.The inventive device for measuring a level with the characterizing features of the main claim has the advantage that in a simple way an improvement is achieved in that damage to the sound duct at temperatures below the freezing point of the liquid is avoided by the sound duct outside Container is arranged.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung zur Messung eines Füllstandes möglich.The measures listed in the dependent claims advantageous refinements and improvements of the main claim device for measuring a level are possible.
Weiterhin vorteilhaft ist, wenn der Schallführungskanal einen parallel und nahe dem Behälterboden verlaufenden Vorlaufbereich aufweist, da auf diese Weise die Laufzeit der ausgesendeten Schallimpulse verlängert wird, so daß die erfindungsgemäße Vorrichtung auch bei niedrigen Füllständen den ausgesendeten Schallimpuls von dem reflektierten Schallimpuls unterscheiden kann.It is also advantageous if the sound guide channel has a parallel and near the container bottom extending flow area, since in this way the duration of the emitted sound pulses is extended, so that the device according to the invention can distinguish the emitted sound pulse from the reflected sound pulse even at low levels.
Weiter vorteilhaft ist, wenn der Schallführungskanal zumindest eine Referenzreflektionsfläche aufweist, da auf diese Weise Störeinflüsse nachträglich in einer Auswerteeinheit herausgerechnet werden können.It is also advantageous if the sound guide channel has at least one reference reflection surface, since in this way disturbing influences can subsequently be eliminated in an evaluation unit.
Sehr vorteilhaft ist es, wenn der Schallführungskanal ein Teil einer Seitenwand ist, da dies hinsichtlich der Herstellung und Montage besonders einfach und kostengünstig ist. Außerdem kann der Schallführungskanal auf diese Weise über Wärmeleitung besonders gut von einer im Behälter vorgesehenen Heizung mit erwärmt werden.It is very advantageous if the sound guide channel is part of a side wall, since this is particularly simple and cost-effective in terms of production and assembly. In addition, the sound duct can be heated in this way by heat conduction particularly well from a provided in the container with heating.
Auch vorteilhaft ist, den Schallführungskanal und/oder den Ultraschallwandler mittels einer Isolierschicht thermisch zu isolieren, da auf diese Weise eine homogene Temperaturverteilung im Schallführungskanal erzielt wird, die für eine exakte Messung des Füllstands erforderlich ist.It is also advantageous to thermally isolate the sound guide channel and / or the ultrasonic transducer by means of an insulating layer, since in this way a homogeneous temperature distribution in the sound guide channel is achieved, which is required for an accurate measurement of the level.
Desweiteren vorteilhaft ist, die Flüssigkeit des Schallführungskanals mittels einer separaten Begleitheizung zu beheizen, da auf diese Weise ein Gefrieren der Flüssigkeit im Schallführungskanal vermieden bzw. ein Auftauen der Vorrichtung beim Starten der Brennkraftmaschine ermöglicht wird.Furthermore, it is advantageous to heat the liquid of the sound guide channel by means of a separate heat tracing, as avoided in this way a freezing of the liquid in the sound guide channel or thawing of the device when starting the internal combustion engine is made possible.
Darüber hinaus vorteilhaft ist, den Schallführungskanal aus elastischem Kunststoff herzustellen, da auf diese Weise eine Beschädigung des Schallführungskanals beim Gefrieren der Flüssigkeit im Schallführungskanal vermieden wird.Moreover, it is advantageous to produce the sound duct of elastic plastic, since in this way damage to the sound duct during freezing of the liquid in the sound duct is avoided.
Vorteilhaft ist, wenn in dem Schallführungskanal eine Innenleitung vorgesehen ist, die mit Gas und/oder mit Schaumstoff ausgefüllt ist, da auf diese Weise eine Volumenzunahme der Flüssigkeit kompensiert und damit ein Beschädigen des Schallführungskanals vermieden wird.It is advantageous if an inner line is provided in the sound guide channel, which is filled with gas and / or foam, since in this way an increase in volume of the liquid compensated and thus damaging the sound duct is avoided.
Außerdem vorteilhaft ist, wenn am Innenumfang des Schallführungskanals entlang seiner Längserstreckung Schaumstoff vorgesehen ist, da dies eine weitere Ausführung zur Kompensation einer Volumenzunahme der Flüssigkeit beim Gefrieren ist.It is also advantageous if foam is provided on the inner circumference of the sound guide channel along its longitudinal extension, since this is a further embodiment for compensating for an increase in volume of the liquid during freezing.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die Zeichnung zeigt eine erfindungsgemäße Vorrichtung zur Messung eines Füllstandes einer Flüssigkeit in einem Behälter.The drawing shows a device according to the invention for measuring a level of a liquid in a container.
Die erfindungsgemäße Vorrichtung besteht im wesentlichen aus einem Behälter
Beispielsweise von einem Behälterboden
Die Harnstofflösung und die Ammoniaklösung sind sogenannte Reduktionsmittel, die zur Verringerung von Stickoxidemissionen in den Abgaskanal der Brennkraftmaschine eingespritzt werden.The urea solution and the ammonia solution are so-called reducing agents, which are injected into the exhaust passage of the internal combustion engine to reduce nitrogen oxide emissions.
Der Behälter
Der Schallführungskanal
Der Schallführungskanal
In dem Schallführungskanal
Über den Verbindungskanal
Der Schallführungskanal
Der Schallführungskanal
Der Ultraschallwandler
Im Schallführungskanal
Durch den Vergleich der Laufzeit des gemessenen Referenzechos mit der Laufzeit des in der Auswerteeinheit
Damit die Strömung und der damit verbundene Druckabfall in der Förderleitung
Ist die Vorrichtung Temperaturen unterhalb des Gefrierpunkts der Flüssigkeit oder deren Bestandteile ausgesetzt, gefriert die Flüssigkeit in der erfindungsgemäßen Vorrichtung. Erweitert die Flüssigkeit beim Gefrieren ihr Volumen, führt dies zu einer dehnenden Belastung der erfindungsgemäßen Vorrichtung, beispielsweise des Behälters
Um ein Gefrieren der Flüssigkeit
Am Außenumfang des Schallführungskanals
In einer weiteren Ausführung kann der Schallführungskanal
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10312102.1A DE10312102B4 (en) | 2003-03-19 | 2003-03-19 | Device for measuring a level of a liquid in a container |
JP2004074679A JP2004286745A (en) | 2003-03-19 | 2004-03-16 | Device for measuring filling level of liquid in vessel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10312102.1A DE10312102B4 (en) | 2003-03-19 | 2003-03-19 | Device for measuring a level of a liquid in a container |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10312102A1 DE10312102A1 (en) | 2004-09-30 |
DE10312102B4 true DE10312102B4 (en) | 2015-10-08 |
Family
ID=32920939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10312102.1A Expired - Fee Related DE10312102B4 (en) | 2003-03-19 | 2003-03-19 | Device for measuring a level of a liquid in a container |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2004286745A (en) |
DE (1) | DE10312102B4 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2122389A1 (en) * | 2007-02-21 | 2009-11-25 | Sensotech, Inc. | Fluid level measuring method and system therefor |
DE102007059853B4 (en) | 2007-12-12 | 2018-01-25 | Robert Bosch Gmbh | Device for measuring a level of a liquid in a container |
DE102010062315A1 (en) | 2010-11-22 | 2012-05-24 | Robert Bosch Gmbh | Device for storing fluid and for detecting liquid level of fluid in storage container in internal combustion engine of motor vehicle, has measuring unit for detecting level of fluid in area of channel and arranged at outer side of channel |
DE102012007691A1 (en) * | 2012-04-19 | 2013-10-24 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Device for providing a liquid additive |
DE102014202374A1 (en) * | 2014-02-10 | 2015-08-13 | Deere & Company | Fluid intake arrangement |
CN104443902B (en) * | 2014-12-01 | 2016-07-06 | 吉首大学 | Novel ammonia water storage device |
US9458759B2 (en) | 2014-12-26 | 2016-10-04 | Ford Global Technologies, Llc | Method and system for engine cooling system control |
FR3048774B1 (en) * | 2016-03-08 | 2019-12-20 | Lionel Lecrosnier | DEVICE FOR CONTROLLING THE VOLUME OF A PRODUCT CONTAINED IN A TANK |
DE102018202596A1 (en) * | 2018-02-21 | 2019-08-22 | Robert Bosch Gmbh | Sound guiding unit and tank for storing fluid reducing agent |
JP2019158457A (en) * | 2018-03-09 | 2019-09-19 | 株式会社デンソー | Liquid level detector |
EP3822613B1 (en) * | 2019-11-13 | 2023-09-06 | ABB Schweiz AG | Measurement system for determining liquid properties in a vessel |
JP7360046B2 (en) * | 2020-02-25 | 2023-10-12 | 富士通株式会社 | Tank liquid level measuring device |
CN111609901B (en) * | 2020-05-24 | 2022-08-02 | 哈尔滨理工大学 | High-precision short-distance ultrasonic liquid level measuring device |
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JPS5661619A (en) * | 1979-10-25 | 1981-05-27 | Toshiba Corp | Ultrasonic level gauge |
FR2499241A1 (en) * | 1981-01-30 | 1982-08-06 | Digitec | Automatic electronic flowmeter - has measuring tube introduced in fluid conduit with ultrasonic transducer of wall for repeated liq. level measurement by echo detection |
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JP3375899B2 (en) * | 1998-11-26 | 2003-02-10 | 東京計装株式会社 | Bypass pipe level gauge |
JP2001208595A (en) * | 2000-01-24 | 2001-08-03 | Omron Corp | Liquid level-measuring device |
ATE267041T1 (en) * | 2001-03-02 | 2004-06-15 | Haldor Topsoe As | SCR METHOD AND DEVICE FOR REDUCING NOX EMISSIONS |
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2003
- 2003-03-19 DE DE10312102.1A patent/DE10312102B4/en not_active Expired - Fee Related
-
2004
- 2004-03-16 JP JP2004074679A patent/JP2004286745A/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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GB997481A (en) * | 1961-03-07 | 1965-07-07 | Burnett And Rolfe Ltd | Improvements relating to arrangements for use in measuring the liquid content of a container |
US3212338A (en) * | 1962-03-29 | 1965-10-19 | James B O'maley | Digital manometer |
JPS5661619A (en) * | 1979-10-25 | 1981-05-27 | Toshiba Corp | Ultrasonic level gauge |
FR2499241A1 (en) * | 1981-01-30 | 1982-08-06 | Digitec | Automatic electronic flowmeter - has measuring tube introduced in fluid conduit with ultrasonic transducer of wall for repeated liq. level measurement by echo detection |
DE3330059A1 (en) * | 1983-08-19 | 1985-02-28 | Siemens AG, 1000 Berlin und 8000 München | Filling-level gauge for liquid containers |
JPS60219519A (en) * | 1984-04-16 | 1985-11-02 | Matsushita Electric Ind Co Ltd | Bath boiler with water level detector |
JPS60263047A (en) * | 1984-06-07 | 1985-12-26 | Matsushita Electric Ind Co Ltd | Bath boiler equipped with water level detector |
GB2164151A (en) * | 1984-09-07 | 1986-03-12 | James Gerald Lacy | Acoustic liquid level measuring apparatus |
DE3537192A1 (en) * | 1985-10-18 | 1987-04-23 | Gerve Andreas | MEASURING ARRANGEMENT FOR MEASURING THE CHANGE OF A LIQUID AMOUNT, IN PARTICULAR THE OIL AMOUNT IN AN INTERNAL COMBUSTION ENGINE |
DE3926207A1 (en) * | 1989-08-08 | 1991-02-21 | Gerve Andreas | MEASURING ARRANGEMENT FOR MEASURING THE CHANGE OF A LIQUID AMOUNT, IN PARTICULAR THE OIL AMOUNT IN AN INTERNAL COMBUSTION ENGINE |
US5038611A (en) * | 1989-12-20 | 1991-08-13 | Westinghouse Electric Corp. | Apparatus and method for providing a temperature compensated liquid level measurement |
US5119676A (en) * | 1991-09-03 | 1992-06-09 | The Babcock & Wilcox Company | Ultrasonic method and apparatus for determining water level in a closed vessel |
DE4328046A1 (en) * | 1992-08-29 | 1994-03-03 | Smiths Industries Plc | Ultrasonic liquid level sensor |
US5471872A (en) * | 1994-01-07 | 1995-12-05 | Semitool, Inc. | Acoustic liquid level measuring apparatus |
JPH11153471A (en) * | 1997-11-18 | 1999-06-08 | Nippon Soken Inc | Liquid information measuring device using sound wave |
DE19932344A1 (en) * | 1999-07-10 | 2001-01-11 | Sonotec Dr Zur Horst Meyer & M | Arrangement for continuous level measurement in fuel tanks |
DE19942378A1 (en) * | 1999-09-04 | 2001-03-08 | Mannesmann Vdo Ag | Device for measuring a level of a liquid in a container |
Also Published As
Publication number | Publication date |
---|---|
JP2004286745A (en) | 2004-10-14 |
DE10312102A1 (en) | 2004-09-30 |
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