DE10258017A1 - Leakage measurement arrangement comprises a test volume connected to a test item so that any pressure change between the test volume and a reference volume can be related to a leak in the test item - Google Patents
Leakage measurement arrangement comprises a test volume connected to a test item so that any pressure change between the test volume and a reference volume can be related to a leak in the test item Download PDFInfo
- Publication number
- DE10258017A1 DE10258017A1 DE2002158017 DE10258017A DE10258017A1 DE 10258017 A1 DE10258017 A1 DE 10258017A1 DE 2002158017 DE2002158017 DE 2002158017 DE 10258017 A DE10258017 A DE 10258017A DE 10258017 A1 DE10258017 A1 DE 10258017A1
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- DE
- Germany
- Prior art keywords
- test
- volume
- leakage
- pressure
- measuring device
- 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- Withdrawn
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Die Erfindung betrifft eine Leckagemesseinrichtung sowie ein Verfahren zu deren Anwendung gemäß dem Oberbegriff der unabhängigen Ansprüche.The invention relates to a leakage measuring device and a method for its use according to the preamble of the independent claims.
Aus der
Aufgabe der Erfindung ist es, eine Leckagemesseinrichtung zur reproduzierbaren und automatisierbaren Messung sehr kleiner Leckagen sowie ein Verfahren zu deren Anwendung anzugeben.The object of the invention is to provide a Leakage measuring device for reproducible and automatable Measurement of very small leaks and a method for their application specify.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale der unabhängigen Ansprüche gelöst.This object is achieved by the characterizing features of the independent claims.
Dazu weist die Leckagemesseinrichtung einen Prüfling auf, der mit einem als Druckmittelquelle dienenden separaten Prüfvolumen hydraulisch verbunden ist, wobei der Prüfling als Ausgang für das Prüfvolumen dient. Dem Prüfvolumen ist ein Referenzvolumen zugeordnet. Das erfindungsgemäße Verfahren sieht vor, dass das Prüfmedium über den Prüfling aus dem Prüfvolumen entweicht, wohingegen das Referenzvolumen abgedichtet ist. Mit dem Austreten von Prüfmedium aus dem Prüfvolumen sinkt der Druck im Prüfvolumen. Der Sensor erfasst die Druckdifferenz zwischen dem an den Prüfling angeschlossenen Prüfvolumen und dem abgedichteten Referenzvolumen. Durch diesen Druckvergleich zwischen Prüfvolumen und Referenzvolumen lässt sich der von schwankenden Umwelteinflüssen bereinigte Druckabfall im Prüfvolumen ermitteln. Dieser bereinigte Druckabfall im Prüfvolumen ist proportional zur über den Prüfling ausgetretenen Menge des Prüfmediums. Die Messwerte sind so genau, dass auch sehr kleine Leckagen gemessen werden können. Die Ergebnisse sind in hohem Maße reproduzierbar.For this purpose, the leakage measuring device a test object on, with a serving as a pressure medium source separate test volume hydraulically connected, the test specimen as output for the test volume serves. The test volume is assigned a reference volume. The inventive method provides that the test medium is out of the test specimen the test volume escapes, whereas the reference volume is sealed. With the exit of test medium decreases from the test volume the pressure in the test volume. The sensor detects the pressure difference between the connected to the DUT Test volume and the sealed reference volume. Through this pressure comparison between test volume and reference volume leaves the pressure drop adjusted by fluctuating environmental influences in the test volume determine. This adjusted pressure drop in the test volume is proportional to the over examinee leaked quantity of the test medium. The readings are so accurate that even very small leaks are measured can be. The results are high reproducible.
Ein weiterer Vorteil des Verfahrens liegt darin, dass der Prüfling im eingebauten Zustand, beispielsweise in seinem Ventilblock verbaut, geprüft werden kann.Another advantage of the process lies in the fact that the examinee installed in the installed state, for example in its valve block, being checked can.
In einer Ausführungsform sind Prüfvolumen und Referenzvolumen gleich groß und werden mit einem Prüfmedium unter dem selben Prüfdruck befüllt. In diesem Fall sind keine Umrechnungen nötig, um die unterschiedlichen Volumengrößen und Ausgangsdrücke zu berücksichtigen. Die Druckdifferenz zwischen Prüfvolumen und Referenzvolumen entspricht direkt dem von Umwelteinflüssen bereinigten Druckabfall im Prüfvolumen und ist damit direkt proportional zur über den Prüfling ausgetretenen Menge des Prüfmediums.In one embodiment, test volumes and Reference volume is the same size and be with a test medium under the same test pressure filled. In In this case, no conversions are necessary to the different Volume sizes and output pressures to take into account. The pressure difference between the test volume and reference volume corresponds directly to the pressure drop adjusted by environmental influences in the test volume and is thus directly proportional to the amount of the leaked over the test specimen Test medium.
Die erfindungsgemäße Leckagemesseinrichtung ermöglicht die einfache und reproduzierbare Messung von kleinen Leckagen über beliebig lange Messzeiträume. Die Sensorsignale werden an eine Signalverarbeitung weitergegeben. Damit ist eine automatisierte Leckagemessung am Prüfling möglich.The leakage measuring device according to the invention allows the simple and reproducible measurement of small leaks over any long measuring periods. The sensor signals are passed on to signal processing. This enables automated leakage measurement on the test specimen.
Erfindungsgemäß wird die Verwendung für hydraulisch beaufschlagte Körper vorgeschlagen. Hydraulisch beaufschlagte Körper sind üblicherweise Teil eines Hydrauliksystems. In diesem Fall handelt es sich bei dem Prüfmedium typischerweise um Hydrauliköl.According to the invention, the use for hydraulic charged body proposed. Hydraulically loaded bodies are usually part of a hydraulic system. In this case, the test medium is typically hydraulic oil.
Weitere Merkmale, Merkmalskombinationen und Vorteile der Erfindung ergeben sich aus der Zeichnung, der Beschreibung sowie den weiteren Ansprüchen. Im Folgenden wird anhand der Zeichnung eine Ausführungsform der Erfindung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Dabei zeigt:Further features, feature combinations and Advantages of the invention will become apparent from the drawing, the description and the other claims. In the following an embodiment of the invention is shown with reference to the drawing and explained in more detail in the following description. Showing:
Die Erfindung betrifft eine Leckagemesseinrichtung
zur Messung der Leckage eines Prüflings
In
Die erfindungsgemäße Leckagemesseinrichtung ermöglicht die
Prüfung
eines Prüflings
Das erfindungsgemäße Drucksystem weist einen
Druckerzeuger
Von der Druckleitung zwischen dem
Prüfvolumen
Die Ventile
In der Verbindungsdruckleitung sind
die Sensoren
Diese Signalauswertung
Vor der Befüllung der Leckagemesseinrichtung
unter Prüfdruck
wird das gesamte System entlüftet
und mit dem Prüfmedium
gespült.
Dazu pumpt der Druckerzeuger
In einer bevorzugten Ausführungsform
erfolgt der Befüllvorgang über den
Prüfling
Wenn die Sensoren
Nach der Beruhigungsphase bleibt
das Referenzvolumen
Zu Messbeginn liegt im Prüfvolumen
Der Druckabfall im Prüfvolumen
In der dargestellten Ausführungsform
sind zusätzlich
zum Druckdifferenzsensor
Die Sensoren
Um die Leckagemesseinrichtung zu
kalibrieren wird eine Leckagemessung mit einem Normleck als Prüfling
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002158017 DE10258017A1 (en) | 2002-12-12 | 2002-12-12 | Leakage measurement arrangement comprises a test volume connected to a test item so that any pressure change between the test volume and a reference volume can be related to a leak in the test item |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002158017 DE10258017A1 (en) | 2002-12-12 | 2002-12-12 | Leakage measurement arrangement comprises a test volume connected to a test item so that any pressure change between the test volume and a reference volume can be related to a leak in the test item |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10258017A1 true DE10258017A1 (en) | 2004-06-24 |
Family
ID=32336223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002158017 Withdrawn DE10258017A1 (en) | 2002-12-12 | 2002-12-12 | Leakage measurement arrangement comprises a test volume connected to a test item so that any pressure change between the test volume and a reference volume can be related to a leak in the test item |
Country Status (1)
Country | Link |
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DE (1) | DE10258017A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004036133A1 (en) * | 2004-07-24 | 2006-02-23 | Festo Ag & Co. | Test gas volume determining method for e.g. container, involves determining pressure-measured values of two volumes, total pressure-measured value of two volumes, determining one volume value based on measured valves |
DE102005026777A1 (en) * | 2005-06-10 | 2006-12-21 | Testo Ag | Method for determining the total leakage rate of pressurized systems and control fitting for carrying out this method |
CN105699022A (en) * | 2016-04-12 | 2016-06-22 | 苏州寅泽缕弦电子技术有限公司 | Gas leakage detector for sealing device |
WO2020021089A1 (en) * | 2018-07-27 | 2020-01-30 | Dsg-Canusa Gmbh | Testing method for testing a cable for leak-tightness, and leak-tightness testing device for carrying out the method |
FR3111988A1 (en) * | 2020-06-29 | 2021-12-31 | Ateq | LEAK DETECTION METHOD AND SYSTEM |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3925067A1 (en) * | 1989-07-28 | 1991-02-07 | Samson Ag | Measuring vol. of hollow body - releasing known vol. at defined pressure into body and into comparison vol. and comparing resulting pressure difference |
US5540083A (en) * | 1993-12-22 | 1996-07-30 | Toyoda Gosei Co., Ltd. | Leakage measuring apparatus |
-
2002
- 2002-12-12 DE DE2002158017 patent/DE10258017A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3925067A1 (en) * | 1989-07-28 | 1991-02-07 | Samson Ag | Measuring vol. of hollow body - releasing known vol. at defined pressure into body and into comparison vol. and comparing resulting pressure difference |
US5540083A (en) * | 1993-12-22 | 1996-07-30 | Toyoda Gosei Co., Ltd. | Leakage measuring apparatus |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004036133A1 (en) * | 2004-07-24 | 2006-02-23 | Festo Ag & Co. | Test gas volume determining method for e.g. container, involves determining pressure-measured values of two volumes, total pressure-measured value of two volumes, determining one volume value based on measured valves |
DE102004036133B4 (en) * | 2004-07-24 | 2006-07-06 | Festo Ag & Co. | Test gas volume determining method for e.g. container, involves determining pressure-measured values of two volumes, total pressure-measured value of two volumes, determining one volume value based on measured valves |
DE102005026777A1 (en) * | 2005-06-10 | 2006-12-21 | Testo Ag | Method for determining the total leakage rate of pressurized systems and control fitting for carrying out this method |
DE102005026777B4 (en) * | 2005-06-10 | 2008-02-21 | Testo Ag | Method for determining the total leakage rate of pressurized systems and control fitting for carrying out this method |
US7899629B2 (en) | 2005-06-10 | 2011-03-01 | Testo Ag | Method for determining the total leak rate of systems impinged upon by pressure, and control apparatus for carrying out said method |
CN105699022A (en) * | 2016-04-12 | 2016-06-22 | 苏州寅泽缕弦电子技术有限公司 | Gas leakage detector for sealing device |
WO2020021089A1 (en) * | 2018-07-27 | 2020-01-30 | Dsg-Canusa Gmbh | Testing method for testing a cable for leak-tightness, and leak-tightness testing device for carrying out the method |
CN112840192A (en) * | 2018-07-27 | 2021-05-25 | Dsg-Canusa有限责任公司 | Test method for testing the tightness of a cable and tightness testing device for carrying out the method |
CN112840192B (en) * | 2018-07-27 | 2024-01-02 | Dsg-Canusa有限责任公司 | Method for testing the tightness of a cable and tightness testing device for carrying out the method |
FR3111988A1 (en) * | 2020-06-29 | 2021-12-31 | Ateq | LEAK DETECTION METHOD AND SYSTEM |
WO2022002890A1 (en) * | 2020-06-29 | 2022-01-06 | Ateq | Leak detection method and system |
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