DE102012002504A1 - Method for evaluating oil level of vehicle in idle state using control and evaluation electronics of oil level sensor, involves determining tilt-induced offset from oil level measured in idle state of vehicle and from compensation value - Google Patents
Method for evaluating oil level of vehicle in idle state using control and evaluation electronics of oil level sensor, involves determining tilt-induced offset from oil level measured in idle state of vehicle and from compensation value Download PDFInfo
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- DE102012002504A1 DE102012002504A1 DE201210002504 DE102012002504A DE102012002504A1 DE 102012002504 A1 DE102012002504 A1 DE 102012002504A1 DE 201210002504 DE201210002504 DE 201210002504 DE 102012002504 A DE102012002504 A DE 102012002504A DE 102012002504 A1 DE102012002504 A1 DE 102012002504A1
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- oil level
- level
- vehicle
- idle state
- oil
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011156 evaluation Methods 0.000 title claims description 5
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000013208 measuring procedure Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Auswertung des Ölstands eines Fahrzeugs im Ruhezustand, wobei Messungen des Ölstands im Ruhezustand des Fahrzeugs und im Fahrbetrieb des Fahrzeugs durchgeführt werden.The invention relates to a method for evaluating the oil level of a vehicle at rest, wherein measurements of the oil level in the idle state of the vehicle and while driving the vehicle are performed.
Vorrichtungen zur Durchführung derartiger Messungen sind beispielsweise aus der
Die Reflexion an der Oberfläche der Flüssigkeit ist besonders gut zu detektieren, wenn die Flüssigkeitsoberfläche waagerecht ist. Daher muss die Vorrichtung zur Messung des Füllstands auch möglichst senkrecht eingebaut werden. Hier sind nur geringe Toleranzen zulässig. Insbesondere wenn der zu messende Füllstand höher ist als der Dämpfungsbecher, führt eine Reflexion an einer geneigten Flüssigkeitsoberfläche dazu, dass die Reflexion den Dämpfungsbecher nicht mehr trifft, also auch nicht innerhalb des Dämpfungsbechers durch Reflexion geführt werden kann, so dass dann gar kein aktuelles Ergebnis vorliegt.The reflection on the surface of the liquid is particularly good to detect when the liquid surface is horizontal. Therefore, the device for measuring the level must also be installed as vertically as possible. Only small tolerances are allowed here. In particular, when the level to be measured is higher than the damping cup, a reflection on an inclined liquid surface causes the reflection no longer hits the damping cup, so it can not be guided by reflection within the damping cup, so that then no actual result exists ,
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit dem bei einer Messung des Ölstands im Ruhezustand eines Fahrzeugs Abweichungen erkannt oder berücksichtigt werden können, die auf eine Neigung oder Schrägstellung des Fahrzeug zurückgehen.The invention has for its object to provide a method of the type mentioned above, can be detected or taken into account in a measurement of the oil level in the idle state of a vehicle deviations, which go back to a slope or inclination of the vehicle.
Die Lösung dieser Aufgabe erfolgt mit einem Verfahren mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Weiterentwicklungen der Erfindung sind in den Unteransprüchen beschrieben.The solution of this object is achieved by a method having the features of claim 1. Advantageous further developments of the invention are described in the subclaims.
Bei einem Verfahren zur Auswertung des Ölstands eines Fahrzeugs im Ruhezustand, wobei automatische Messungen des Ölstands im Ruhezustand des Fahrzeugs und im Fahrbetrieb des Fahrzeugs durchgeführt werden, ist erfindungswesentlich vorgesehen, dass aus dem im Ruhezustand des Fahrzeugs gemessen Ölstand und aus einem Kompensationswert auf Basis eines vorher während des Fahrbetriebs ermittelten Ölstands ein neigungsbedingter Offset ermittelt wird. Dieser Offset kann auch als Abweichung zwischen dem erwarteten Füllstand ohne Neigung und des aktuellen Füllstands betrachtet werden. Dieser Offset ist dann bedingt durch die Neigung. Solange die Position des Fahrzeugs nicht variiert wird, kann dieser Offset immer für eine Füllstandsmessung verwendet. Dies gilt auch für den Fall einer Nachfüllung mit anschließender Messung. Dies kann man auch als elektrischen Peilstab betrachten. Insgesamt erfolgt hier eine Kombination der dynamischen Messung, welche sehr genau ist, und der statischen Messung, die ohne Verzögerung aktuelle Messwerte liefern kann. Durch präzise Wertermittlung aus der dynamischen Messung während des Fahrbetriebs wird eine Referenz geschaffen. Wenn das Fahrzeug seine Position nicht mehr verändert, wird ein Offset zum nominellen Füllstand berechnet. Dieser Offset ist von der Neigung des Fahrzeugs verursacht. Die tatsächliche Neigung und Richtung der Fahrzeugneigung ist dann nicht mehr relevant. Es muss daher kein weiterer Aufwand für eine Neigungsmessung des Fahrzeugs selbst durchgeführt werden. Die Berücksichtigung der Neigung und damit eine erhöhte Genauigkeit der Auswertung des Ölstands erfolgt einzig durch das Verfahren selbst, ohne dass zusätzliche Applikationen vorgenommen werden müssten.In a method for evaluating the oil level of a vehicle at rest, wherein automatic measurements of the oil level in the idle state of the vehicle and while driving the vehicle are carried out, it is essential to the invention that measured from the idle state of the vehicle oil level and a compensation value based on a previously oil level determined during the driving operation, an inclination-related offset is determined. This offset can also be considered as a deviation between the expected level without slope and the current level. This offset is then due to the inclination. As long as the position of the vehicle is not varied, this offset can always be used for a level measurement. This also applies to the case of refilling with subsequent measurement. This can also be considered as an electric dipstick. Overall, here is a combination of the dynamic measurement, which is very accurate, and the static measurement, which can deliver current readings without delay. Precise determination of the value of the dynamic measurement during driving creates a reference. If the vehicle does not change its position, an offset to the nominal level is calculated. This offset is caused by the inclination of the vehicle. The actual inclination and direction of the vehicle inclination is then no longer relevant. There is therefore no further effort required for a tilt measurement of the vehicle itself. The consideration of the inclination and thus an increased accuracy of the evaluation of the oil level is carried out solely by the process itself, without additional applications would have to be made.
Bevorzugt ist der Kompensationswert der während des Fahrbetriebs ermittelte Ölstand in Form eines Mittelwertes, der die Abweichung zum Minimumkennfeld darstellt. Unter dem Minimumkennfeld versteht man dabei einen Langzeitmittelwert, der bei Mindestölstand im dynamischen Fahrbetrieb erhalten werden würde.Preferably, the compensation value of the oil level determined during the driving operation is in the form of an average value representing the deviation from the minimum characteristic map. Under the minimum map is understood to mean a long-term mean that would be obtained at minimum oil level in dynamic driving.
Der Offset wird in einer bevorzugten Ausgestaltung der Erfindung als Differenz aus dem erwarteten Füllstand im Ruhezustand bei Referenztemperatur und dem temperaturkompensierten aktuellen Füllstand berechnet wird. Dies ist der berechnete Füllstands-Offset für die aktuelle Parkposition. Ohne Neigung müsste dieser Wert „0” sein. Der bei dieser Berechnung verwendete erwartete Füllstand im Ruhezustand bei Referenztemperatur wird berechnet als die Summe aus dem nominellen Mindestfüllstand im Ruhezustand und einem Kompensationswert, der als Mittelwert die Abweichung zu Minimumkennfeld im Fahrbetrieb darstellt. Der temperaturkompensierte aktuelle Füllstand wird als Produkt aus dem aktuellen gemessenen Füllstand im Ruhezustand und einem Kompensationsfaktor zur Temperaturkompensierung und gegebenenfalls zur Rücklaufkompensierung gebildet. Ob der Kompensationsfaktor auch die Rücklaufkompensierung beinhalten muss, hängt davon ab, ob im Ruhezustand im „Leerlauf” oder im Fall „Motor aus” gemessen wird. Im Fall „Motor aus” erfolgt auch eine Rücklaufkompensation.The offset is calculated in a preferred embodiment of the invention as a difference from the expected level in the idle state at reference temperature and the temperature-compensated current level. This is the calculated level offset for the current parking position. Without inclination, this value would have to be "0". The expected level used in this calculation at rest at reference temperature is calculated as the sum of the nominal minimum level in the idle state and a compensation value, which represents the deviation from the minimum map in driving mode as the mean value. The temperature-compensated actual level is calculated as the product of the current measured level at rest and a compensation factor for temperature compensation and optionally formed for return compensation. Whether the compensation factor also has to include return compensation depends on whether idle is measured in idle mode or in the case of engine off. In the case of "motor off" also a return compensation takes place.
Weitergehend wird bevorzugt auch ein Referenzfüllstand ermittelt. Der Referenzfüllstand wird aus der Summe des temperaturkompensierten aktuellen Füllstands und dem neigungsabhängigen Offset ermittelt.Furthermore, a reference level is preferably also determined. The reference level is determined from the sum of the temperature-compensated current level and the slope-dependent offset.
Bevorzugt wird beim Ruhezustand zwischen den Fällen „Leerlauf” und „Motor aus” unterschieden. Sämtliche der oben genannten Werte mit Ausnahme des während des Fahrbetriebs ermittelten Werts, werden getrennt für den Fall „Leerlauf” und für den Fall „Motor aus” betrachtet.In the idle state, a distinction is preferably made between the cases "idle" and "engine off". All of the above values, with the exception of the value determined during driving, are considered separately for the case "idle" and for the case "engine off".
Der Ölstand wird bevorzugt mit einer ultraschallbasierten Messung mit einer Reflexion von Ultraschallwellen an der Oberfläche des Öls durchgeführt. Grundsätzlich sind jedoch auch andere automatische oder elektronische Verfahren denkbar, die den Ölstand im Ruhezustand und im Fahrbetrieb bzw. dynamischen Messen können.The oil level is preferably performed with an ultrasonic-based measurement with reflection of ultrasonic waves on the surface of the oil. Basically, however, other automatic or electronic methods are conceivable that can the oil level at rest and driving or dynamic measurement.
Das Verfahren kommt bevorzugt beim Einbau des Ölsensors und der dabei notwendigen Einstellung zum Einsatz. Ein weiterer Aspekt der Erfindung besteht in der Bereitstellung einer Vorrichtung zur Ölstandsmessung mit einer Steuer- und Auswerteelektronik, die mit dem oben genannten Verfahren arbeitet.The method is preferably used when installing the oil sensor and the necessary adjustment. Another aspect of the invention is to provide a device for oil level measurement with a control and evaluation, which operates with the above method.
Die Berechnung erfolgt insbesondere mit folgenden Formeln:
dynAvgComp:
Langzeitmittelwert welcher die Abweichung zum Minimum Kennfeld darstellt (dynamisch, d. h. während des Fahrbetriebs ermittelt und somit sehr genau da abnorme Fahrzustände und Temperaturbereich nicht berücksichtigt werden).
NomMin:
nomineller Min-Füllstand (ohne Fahrzeugneigung bei Referenztemperatur) bei Motor im Leerlauf oder Motor aus.
NomLevel:
Nomineller Füllstand, welcher sich einstellen müsste, wenn das Fahrzeug ohne Neigung stehen würde (bei Referenztemperatur), d. h. es wird auf dem NomMin der dynamsiche und kompensierte Mittelwert dynAvgComp aufaddiert.
actLevel(T):
aktueller Füllstand der jeweiligen Temperatur.
actLevelComp:
aktueller Temperaturkompensierter Füllstand (Berücksichtigung der Ölexpansion und im Leerlauf zusätzlich des Rückflussverhalten im Motor).
LevelOffsetPos:
Berechneter Füllstand Offset für die aktuelle Parkposition (Neigungs-Füllstands-Offset) und somit für die jeweilige Neigung des Fahrzeugs, d. h. NomLevel – actLevelComp (ohne Neigung müsste der Wert Null annehmen).
RefLevel:
Refernz Füllstand welcher sich aus dem aktuellen Füllstand der Leerlaufmessung und dem Füllstand Offset berechnet, d. h. actLevvelComp + LevelOffsetPos.The calculation is carried out in particular with the following formulas:
dynAvgComp:
Long-term mean value which represents the deviation from the minimum characteristic map (dynamic, ie determined during driving operation and thus very accurately because abnormal driving conditions and temperature range are not taken into account).
NomMin:
nominal minimum level (without vehicle inclination at reference temperature) with engine idling or engine off.
NomLevel:
Nominal level, which would have to be set if the vehicle would stand without inclination (at reference temperature), ie the dynamic and compensated mean value dynAvgComp is added to the NomMin.
actLevel (T) :
current level of the respective temperature.
actLevelComp:
current temperature-compensated level (taking into account the oil expansion and, in idling, the reflux behavior in the engine as well).
LevelOffsetPos:
Calculated level Offset for the current parking position (inclination level offset) and thus for the respective inclination of the vehicle, ie NomLevel - actLevelComp (without inclination the value would have to be zero).
RefLevel:
Reference level which is calculated from the current level of the idle measurement and the level offset, ie actLevvelComp + LevelOffsetPos.
Für die Werte NomMin, NomLevel, actLevel, actLevelComp LevelOffsetPos und RefLevel wird jeweils unterschieden zwischen den Variablen für das Messverfahren im Fall „Leerlauf” und im Fall „Motor aus”.For the values NomMin, NomLevel, actLevel, actLevelComp LevelOffsetPos and RefLevel a distinction is made between the variables for the measuring procedure in the case of "Idle" and in the case of "Motor off".
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102010011490 A1 [0002] DE 102010011490 A1 [0002]
- DE 102009036888 A1 [0002] DE 102009036888 A1 [0002]
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210002504 DE102012002504A1 (en) | 2012-02-10 | 2012-02-10 | Method for evaluating oil level of vehicle in idle state using control and evaluation electronics of oil level sensor, involves determining tilt-induced offset from oil level measured in idle state of vehicle and from compensation value |
CZ20130070A CZ201370A3 (en) | 2012-02-10 | 2013-02-01 | Evaluation method of oil level in a vehicle |
CN201310051175.0A CN103245390B (en) | 2012-02-10 | 2013-02-16 | Method for analyzing the oil level of vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210002504 DE102012002504A1 (en) | 2012-02-10 | 2012-02-10 | Method for evaluating oil level of vehicle in idle state using control and evaluation electronics of oil level sensor, involves determining tilt-induced offset from oil level measured in idle state of vehicle and from compensation value |
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DE102012002504A1 true DE102012002504A1 (en) | 2013-08-14 |
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DE201210002504 Pending DE102012002504A1 (en) | 2012-02-10 | 2012-02-10 | Method for evaluating oil level of vehicle in idle state using control and evaluation electronics of oil level sensor, involves determining tilt-induced offset from oil level measured in idle state of vehicle and from compensation value |
Country Status (3)
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CN (1) | CN103245390B (en) |
CZ (1) | CZ201370A3 (en) |
DE (1) | DE102012002504A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113074798A (en) * | 2020-01-06 | 2021-07-06 | 广州汽车集团股份有限公司 | System and method for detecting oil level of engine oil based on ultrasonic waves |
CN115507918A (en) * | 2022-09-27 | 2022-12-23 | 戴天智能科技(上海)有限公司 | Transformer oil level detection method and system based on ultrasonic principle |
DE102014107858B4 (en) | 2014-06-04 | 2024-02-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method and measuring device for measuring an oil level in an oil sump of a motor vehicle engine |
Families Citing this family (4)
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CN106932054A (en) * | 2015-12-30 | 2017-07-07 | Zf腓特烈斯哈芬股份公司 | A kind of oil level indicator |
CN105737935A (en) * | 2016-02-25 | 2016-07-06 | 吴伟民 | Vehicle oil mass detection method and system |
CN114320525B (en) * | 2022-01-10 | 2023-03-28 | 中国第一汽车股份有限公司 | Engine oil quantity monitoring method and device, electronic equipment and storage medium |
CN114856757B (en) * | 2022-05-20 | 2023-03-14 | 中国第一汽车股份有限公司 | Method, device and storage medium for determining an oil level of an engine |
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CA2194806A1 (en) * | 1996-02-20 | 1997-08-21 | Jack B. Meister | System and method for measuring level of turbulent liquid |
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2012
- 2012-02-10 DE DE201210002504 patent/DE102012002504A1/en active Pending
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- 2013-02-16 CN CN201310051175.0A patent/CN103245390B/en active Active
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DE4025326A1 (en) * | 1990-05-10 | 1991-11-14 | Krieg Gunther | Level measurement, esp. in vehicle engine sump - using detection of ultrasonic pulses transmitted through liquid and reflected back from surface |
DE4305310A1 (en) * | 1993-02-20 | 1994-06-01 | Audi Ag | Vehicle fuel tank contents measuring method - involves substitution of memorised average signal for actual signal when vehicle is restarted from rest on significant slope |
DE19602599A1 (en) * | 1996-01-25 | 1997-07-31 | Daimler Benz Ag | Method for determining a quantity of liquid, in particular the quantity of engine oil, in a motor vehicle |
DE102009036888A1 (en) | 2009-05-29 | 2010-12-02 | Hella Kgaa Hueck & Co. | Absorption cup for oil level measuring instrument of engine, particularly in motor vehicle, has surface within upper range, which is arranged opposite to measuring channel in absorption cup in angular manner |
DE102010011490A1 (en) | 2010-03-16 | 2011-09-22 | Hella Kgaa Hueck & Co. | Device for measuring foamed media |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014107858B4 (en) | 2014-06-04 | 2024-02-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method and measuring device for measuring an oil level in an oil sump of a motor vehicle engine |
CN113074798A (en) * | 2020-01-06 | 2021-07-06 | 广州汽车集团股份有限公司 | System and method for detecting oil level of engine oil based on ultrasonic waves |
CN115507918A (en) * | 2022-09-27 | 2022-12-23 | 戴天智能科技(上海)有限公司 | Transformer oil level detection method and system based on ultrasonic principle |
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Publication number | Publication date |
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CZ201370A3 (en) | 2013-08-21 |
CN103245390A (en) | 2013-08-14 |
CN103245390B (en) | 2019-01-22 |
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