EP3387393A1 - Ultraschallsensor zur bestimmung eines flüssigkeitspegels - Google Patents
Ultraschallsensor zur bestimmung eines flüssigkeitspegelsInfo
- Publication number
- EP3387393A1 EP3387393A1 EP16798146.3A EP16798146A EP3387393A1 EP 3387393 A1 EP3387393 A1 EP 3387393A1 EP 16798146 A EP16798146 A EP 16798146A EP 3387393 A1 EP3387393 A1 EP 3387393A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer tube
- ultrasonic sensor
- base
- inner tube
- sensor according
- 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- Withdrawn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
- 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
- G01F23/2968—Transducers specially adapted for acoustic level indicators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M11/12—Indicating devices; Other safety devices concerning lubricant level
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/098—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks
-
- 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
-
- 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
Definitions
- the present invention relates to an ultrasonic sensor for determining a liquid level with an elongated housing which has an outer tube and an inner tube arranged therein serving as a measuring chamber, and a base on which the housing is arranged and in the region thereof Ultrasonic transceiver is located.
- a known sensor is designed to have three parts, namely an inner tube, an outer tube and a corresponding cap. These parts are assembled in three steps.
- the inner tube is inserted into the outer tube, the outer tube is welded to a corresponding base housing by means of laser and in the last step, the cap is placed on the outer tube and locked with this.
- the outer tube is formed laser-transparent. This usually increases the material costs.
- an ultrasonic sensor of the type described above is known.
- the sensor works in such a way that the inner tube designed as a measuring chamber receives the liquid whose level is to be measured. Outside the measuring chamber, the liquid assumes the same level as inside the measuring chamber.
- the acoustic signals emitted by the ultrasonic transceiver are reflected from the surface of the liquid and received by the transceiver to determine the liquid level from the sound propagation time.
- an ultrasonic sensor is used in particular to determine the engine oil level in motor vehicles.
- the present invention has for its object to provide an ultrasonic sensor of the type described above, which is particularly easy to install and variable.
- an ultrasonic sensor of the specified type in that it is provided with a serving for fixing the housing to the base radially outwardly extended lower edge of the outer tube, which is latched with at least one arranged on the base hook-shaped locking element.
- the invention provides a simple and cost Monta ⁇ ge réellekeit of the ultrasonic sensor, for which must be taken at ⁇ wierien measures.
- only the lower edge of the outer tube must be designed accordingly, namely having a radially outwardly extended lower edge.
- At the base element is at least one hook-shaped
- Locking element provided, with which the outer tube can be latched over the thickened lower edge.
- the at least one hook-shaped latching element is preferably designed such that it extends from the base upwards extending main portion and an obliquely downwardly from the tip and radially inwardly extending flexible hook portion. Therefore, when the outer tube is placed on the base, the thickened edge presses the flexible hook portion radially outward, which then, after passing the edge, springs back inward and comes to lie on the edge and lock it.
- the senor has a plurality of circularly arranged latching elements, between which a liquid inlet opening is arranged in the outer tube.
- latching elements For example, six locking elements are arranged, which engage with the thickened lower edge of the outer tube in latching connection.
- This type of fixation of the outer tube to the base has the advantage that the outer tube can assume any positions in the circumferential direction, if only its liquid inlet opening is arranged between two latching elements. The outer tube can therefore be rotated until it reaches the desired
- Position occupies, without affecting the internal structure of the ultrasonic sensor is adversely affected.
- the position of the ultrasonic sensor can therefore be adapted, for example, in a simple manner to the situation within an oil sump, for example in relation to the oil return lines or for the dripping oil from the cylinder cooling. Due to the different position possibilities of the outer tube in the circumferential direction, in particular the effect of avoiding the entry of air bubbles into the measuring chamber is not impaired.
- the outer tube and the base are to be formed according to the inventive design, which makes the special ⁇ the outer tube is a very simple molding. Both parts can be easily mounted on each other and separated again.
- the outer tube and the inner tube expediently each have a liquid inlet opening and a ventilation opening. Therefore, the liquid entering the sensor first passes through the chamber formed between the outer tube and inner tube and then enters the inner tube, ie the actual measuring chamber, outside of the measuring chamber, the desired venting takes place, so that foaming is avoided.
- the outer tube on its inner side and / or the inner tube on its outer side min ⁇ least one radial partition, which serves to position the inner tube in the outer tube. Furthermore, the liquid can be guided in a labyrinth-like manner via these dividing walls before it enters the measuring chamber in order to further favor the venting.
- a radially extending nose is arranged on the at least one partition, which engages in a recess on the inside of the outer tube or the outer side of the inner tube.
- the inner tube is fixed to the outer tube, after which the assembly of the outer tube takes place at the base. This fixation can be realized in ⁇ example, such a nose.
- Such a clamping connection between outer tube and inner tube is preferred in order to enable easy assembly and disassembly for repair or maintenance purposes.
- three partitions are provided between outer tube and inner tube, which divide the annular space between inner tube and outer tube in three areas or spaces. These partitions can be obtained ent ⁇ speaking passage openings for the liquid, and that distributed over the height of the sensor, so that the elongated flow paths for the fluid to be measured result that favor the defoaming.
- the first partition extends from the base to the cover
- the second partition wall has a fluid passage opening at a distance from the base
- Partition has a liquid passage opening at the lower end and a vent opening at the upper end.
- a fluid passes through the outer tube, wherein the first ge ⁇ connected partition defines a single flow direction in the circumferential direction.
- the liquid then passes to the second partition and penetrates through the opening provided in this, wherein the wall portion of the second partition under the
- Liquid passage opening is preferably inclined in order to promote the movement of air bubbles, which are carried in the liquid upwards and to reduce the amount of foam which penetrates into the second space between the second and third partition wall. The liquid can then penetrate through this partition in the third space and from there into the measuring chamber.
- a labyrinth-shaped flow path is formed, which serves to prevent air bubbles from penetrating into the inner tube, in which the level measurement is performed.
- the outer tube preferably has a cover extending over the inner tube, which is fixed on the outer tube of the outer tube or formed integrally therewith, so that no special cap mounting operation has to be performed.
- the outer tube can be fixed in various positions in the circumferential direction on the base.
- appropriate measures can be provided which specify a certain position of the outer tube in the circumferential direction, ie cause automatically only a single position can be realized.
- in this case has for fixing the housing in the circumferential direction of one of the locking elements has a recess with which a arranged on the outside of the outer tube nose can engage.
- a reverse embodiment may be realized in which a nose engages at any locking element in a recess on the outer tube. If in this combination of nose and recess, the corresponding dimensions are formed larger than the gaps between the individual locking elements, a latching operation can be realized only in a single position, which is predetermined by the corresponding nose / recess combination.
- FIG. 1 shows a schematic longitudinal section through an ultrasound sensor
- Figure 2 is a schematic horizontal section through the
- FIG. 3 shows a development of the inner tube of the ultrasonic ⁇ sensor in a schematic representation
- FIG. 4 shows a representation of the fixing of the outer tube to the
- the ultrasonic sensor shown in the figures has an inner tube 3, in the interior of which a measuring chamber 17 is formed, an outer tube 2 with an integrally formed therewith cap 6 and a base 1, at the bottom of an only schematically illustrated ultrasonic transceiver 21 is arranged.
- the ultrasonic sensor shown here is located for example in the oil pan of a motor vehicle, the oil level in the measuring chamber 17 and in the space between the outer tube 2 and inner tube 3 is indicated at 4. This oil level 4 should be determined by an ultrasonic transit time measurement by the transceiver 21.
- the labyrinth-shaped path of the oil into the measuring chamber 17 is intended to prevent air bubbles from being introduced into the measuring chamber 17 and therefore a foam layer forms in the measuring chamber. A vent should therefore already take place before entering the measuring chamber 17.
- the ultrasonic sensor shown here thus consists of three parts, the base 1, the outer tube 2 with cap 6 and the inner tube 3. During assembly, the inner tube 3 is fixed to the outer tube (for example, by a nose, not shown here, on a partition extending from the radial inner tube, which engages in a recess in the outer tube).
- Inner tube 3 existing unit is then fixed to the base 1 by the unit with the base 1 is locked.
- the outer tube 2 has a radially outwardly widened lower edge 9. Furthermore, there are arranged on the base six circularly spaced-apart locking elements 10, which have a hook-shaped configuration and have an upwardly extending main portion and an obliquely downwardly extending from the tip flexible hook portion 11.
- the outer tube 3 When placing the outer tube 3 on the base 1 of the thickened lower edge 9 of the outer tube 2 pushes the flexible hook portions 11 of the individual locking elements 10 radially outward and slides along these down. When the edge has passed the flexible portion 11, the hook portion 11 moves radially inward again and takes one
- the outer tube when placed on the base can only assume a certain position in the circumferential direction, the lower edge 9 of the outer tube 2 is provided with a radially outwardly projecting nose 16, which in a corresponding Recess engages in a locking element 10. Since the nose 16 is formed larger than the distance between two adjacent locking elements 10, the outer tube can be fixed only in this single position.
- the inner tube 3 has three radially outwardly directed partitions 13, 14, 15, via which the inner tube 3 is arranged centrally in the outer tube 2.
- one or more partitions may in this case have ent ⁇ speaking lugs which engage in recesses of the outer tube.
- three spaces 18, 19, 20 are formed between the outer tube 2 and the inner tube 3, which must pass through the penetrating at 12 through the outer tube oil to pass through the inlet opening 7 into the measuring chamber 17. This creates a labyrinthine path for the oil to provide venting outside the metering chamber.
- Figure 3 shows a development of the inner tube 3. It can be seen that the partition 13 passes through from bottom to top.
- the partition wall 14 has a passage opening 22 at a distance from the lower end, wherein the lower wall portion of the partition wall 14 is formed inclined to promote the vent.
- the third partition wall 15 has a passage opening at the lower end and a vent opening at the upper end. 5, the vent opening of the outer tube and at 12 the inlet opening in the outer tube is indicated. 7, the inlet opening in the inner tube and 8 denotes the vent opening of the inner tube.
- the oil enters via the inlet opening 12 in the first space 18 and is due to the continuous partition 13 for
- Passage opening 22 passed in the second partition 14. It enters the space 19 and flows through the lower opening in the partition wall 15 into the space 20, from which it passes via the inlet opening 7 into the measuring chamber 17. The reaching into the measuring chamber 17 oil is then vented accordingly. The corresponding level measurement in the measuring chamber 17 can now take place.
- the outer tube 2 with inner tube 3 can be deducted by applying force up from the base 1, wherein the corresponding flexible hook portions 11 are pressed outward and then snap back flexible in their initial position.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015224932.8A DE102015224932B3 (de) | 2015-12-11 | 2015-12-11 | Ultraschallsensor zur Bestimmung eines Flüssigkeitspegels |
| PCT/EP2016/077948 WO2017097559A1 (de) | 2015-12-11 | 2016-11-17 | Ultraschallsensor zur bestimmung eines flüssigkeitspegels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3387393A1 true EP3387393A1 (de) | 2018-10-17 |
Family
ID=57348666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16798146.3A Withdrawn EP3387393A1 (de) | 2015-12-11 | 2016-11-17 | Ultraschallsensor zur bestimmung eines flüssigkeitspegels |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20180372533A1 (de) |
| EP (1) | EP3387393A1 (de) |
| KR (1) | KR20180072785A (de) |
| CN (1) | CN108369127A (de) |
| DE (1) | DE102015224932B3 (de) |
| WO (1) | WO2017097559A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013016164B4 (de) * | 2013-09-30 | 2023-06-15 | HELLA GmbH & Co. KGaA | Vorrichtung zur Bestimmung eines Füllstands sowie Motor und Kraftfahrzeug mit einer derartigen Vorrichtung |
| CN109959429B (zh) * | 2017-12-26 | 2024-07-09 | 广东正扬传感科技股份有限公司 | 一种超声波探测器及探测设备 |
| CN113720765B (zh) * | 2020-05-25 | 2023-10-20 | 中国石油化工股份有限公司 | 输气管道腐蚀状态检测方法及系统 |
| CN113418064B (zh) * | 2021-05-21 | 2024-03-19 | 江苏大学 | 一种输油臂自动对接系统 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141264A (en) * | 1990-03-19 | 1992-08-25 | Usui Kokusai Sangyo Kaisha Ltd. | Connector for connecting thin tube |
| EP1134038A1 (de) * | 2000-03-08 | 2001-09-19 | Endress + Hauser GmbH + Co. | Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstandes in einem Behälter |
| CN2741019Y (zh) * | 2004-11-19 | 2005-11-16 | 罗瑞杨 | 液量感测装置 |
| JP4306614B2 (ja) * | 2005-01-06 | 2009-08-05 | 株式会社デンソー | 液面検出装置 |
| US20090301187A1 (en) * | 2006-07-18 | 2009-12-10 | Conti Temic Microelectronic Gmbh | Multichamber ultrasonic sensor for determining a liquid level |
| CN104596618B (zh) * | 2007-01-17 | 2018-04-13 | 伊利诺斯工具制品有限公司 | 分离的液位传感器及底座 |
| DE102007014540B4 (de) * | 2007-03-27 | 2014-10-30 | Hella Kgaa Hueck & Co. | Dämpfungsbecher |
| DE102008017183B4 (de) * | 2008-04-04 | 2019-11-07 | Volkswagen Ag | Verfahren zum Messen eines Füllstands einer Flüssigkeit in einem Behälter für ein Kraftfahrzeug und entsprechende Vorrichtung |
| DE102010011490A1 (de) * | 2010-03-16 | 2011-09-22 | Hella Kgaa Hueck & Co. | Vorrichtung zur Messung verschäumter Medien |
| CN201917379U (zh) * | 2010-12-31 | 2011-08-03 | 济南新天宇汽车电器有限公司 | 车用超声波液位传感器 |
| DE102012004932A1 (de) * | 2012-03-10 | 2013-09-12 | Hella Kgaa Hueck & Co. | Vorrichtung zur Messung eines Füllstands einer Flüssigkeit in einem Behälter |
| CN104848919A (zh) * | 2014-11-28 | 2015-08-19 | 重庆斯凯力科技有限公司 | 低油位传感器 |
-
2015
- 2015-12-11 DE DE102015224932.8A patent/DE102015224932B3/de active Active
-
2016
- 2016-11-17 WO PCT/EP2016/077948 patent/WO2017097559A1/de not_active Ceased
- 2016-11-17 CN CN201680072496.0A patent/CN108369127A/zh active Pending
- 2016-11-17 US US16/060,809 patent/US20180372533A1/en not_active Abandoned
- 2016-11-17 EP EP16798146.3A patent/EP3387393A1/de not_active Withdrawn
- 2016-11-17 KR KR1020187014393A patent/KR20180072785A/ko not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN108369127A (zh) | 2018-08-03 |
| DE102015224932B3 (de) | 2017-01-26 |
| WO2017097559A1 (de) | 2017-06-15 |
| US20180372533A1 (en) | 2018-12-27 |
| KR20180072785A (ko) | 2018-06-29 |
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