DE202016006152U1 - Measuring and testing device for the detection of bubbles in optically accessible liquids - Google Patents
Measuring and testing device for the detection of bubbles in optically accessible liquids Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 238000011156 evaluation Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000001454 recorded image Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011148 porous material Substances 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
- 240000003517 Elaeocarpus dentatus Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- SYJRVVFAAIUVDH-UHFFFAOYSA-N ipa isopropanol Chemical compound CC(C)O.CC(C)O SYJRVVFAAIUVDH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/10—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for containers, e.g. radiators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- 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
- G01M3/38—Investigating fluid-tightness of structures by using light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/102—Detection of leaks in membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/104—Detection of leaks in membrane apparatus or modules
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0007—Investigating dispersion of gas
- G01N2015/0011—Investigating dispersion of gas in liquids, e.g. bubbles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
Mess- und Prüfvorrichtung zur Detektion von Blasen in optisch zugänglichen Flüssigkeiten dadurch gekennzeichnet, dass eine Blase (6) und/oder Blasenkette (10) während ihres Aufstiegs in der Flüssigkeit (3) mittels einer Kamera (7) optisch erfasst wird, die von der Kamera (7) erfassten Bilddaten automatisiert ausgewertet werden und dass die Auswertung der in den Bilddaten vorhandenen Blasen (6) vom Hintergrund und anderen Störungen separiert wird.Measuring and testing device for the detection of bubbles in optically accessible liquids, characterized in that a bubble (6) and / or bubble chain (10) during their ascent in the liquid (3) by means of a camera (7) is optically detected by the Camera (7) recorded image data are evaluated automatically and that the evaluation of existing in the image data bubbles (6) is separated from the background and other disturbances.
Description
Mess- und Prüfvorrichtung zur Detektion von Blasen in optisch zugänglichen Flüssigkeiten mittels automatisierter optischer Erkennung von Blasenketten, zur Qualitätsprüfung von Probekörpern, insbesondere Filterelemente.Measuring and testing device for the detection of bubbles in optically accessible liquids by means of automated optical detection of bubble chains, for the quality testing of specimens, in particular filter elements.
Die hier beschriebene Erfindung lässt sich den technischen Gebieten der Qualitätsüberprüfung von Filterelementen sowie der Bildverarbeitung zuordnen.The invention described here can be assigned to the technical fields of quality inspection of filter elements and image processing.
Stand der TechnikState of the art
Ein laut ISO-Norm [1] durchgeführter Filtertest sieht vor, das zu prüfende Filterelement in 2-Propanol (Isopropanol) einzubringen und nach einer vorgegebenen Einweichzeit mit Druckluft zu beaufschlagen. Bei einer sukzessiven Erhöhung des Druckniveaus zeigt das Aufsteigen von Luftblasen bei Prüfkörpern, wie technische Filter, einen erfolgten „Filterdurchbreuch”. Die zugehörige Druckstufe wird als Bubble-Point des geprüften Filterelementes bezeichnet. Wird der vorgegebenen Bubble-Point nicht erreicht, so gilt das geprüfte Element als Ausschuss. Entsprechend trifft dies auch auf die Prüfnorm
Da laut der Prüfnormen jedoch erst das Aufsteigen einer geschlossenen Blasenkette als Probekörperdurchbruch gewertet wird, muss eine Unterscheidung zwischen Einzelblasen und Blasenketten getroffen werden. Die Norm definiert dabei nicht, auf welcher Basis diese Unterscheidung getroffen werden soll. Ein Großteil der in der Industrie eingesetzten Prüfstände verlässt sich auf eine Kombination aus Druckmessungen und der Bewertung des Bedieners.Since according to the test standards, however, only the rising of a closed bubble chain is considered a sample breakthrough, a distinction between single bubbles and bubble chains must be made. The standard does not define the basis on which this distinction should be made. Much of the test rigs used in the industry rely on a combination of pressure measurements and operator judgment.
Die Steuerung der Druckbeaufschlagung erfolgt anhand der auftretenden Blasen und wird mit Erscheinen einer definierten Blasenkette beendet.The control of the pressurization is based on the bubbles occurring and is terminated with the appearance of a defined bubble chain.
Die momentan eingesetzten Verfahren zur Bestimmung eines Filterdurchbruchs im Bubble-Point-Test sind in der Anwendung aus unterschiedlichen Gründen problematisch:
- • Überwachung des Filterdurchbruches mittels Druckmessung: dieses in einigen Publikationen auch als akustische Messung bezeichnete Verfahren setzt die normkornform [1][2] geforderte Detektion einer geschlossenen Blasenkette nur indirekt um. So kann es schon während der druckbedingten Evakuierung der Filterporen, welche bereits unterhalb des Bubble-Point-Druckes stattfindet, zu Druckabfällen im Filterinnenraum kommen.
- • Überwachung des Filterdurchbruches durch den Bediener des Tests: In diesem Verfahren wird die Norm exakt umgesetzt, der Bediener selbst allerding unzumutbar belastet. Einerseits erfordert die Überwachung der Prüfflüssigkeit auf aufsteigenden Blasen eine beständig hohe Aufmerksamkeit, andererseits ist der Bediener oftmals einer unzulässigen hohen Konzentration aufsteigender Dämpfe aus der Prüfflüssigkeit ausgesetzt. Darüber hinaus führt der subjektiv urteilende Bediener Messunsicherheiten in den Prozess ein, womit eine konstante Beurteilung der untersuchten Filterelemente nicht mehr möglich ist.
- • Monitoring of the filter breakthrough by means of pressure measurement: this method, also referred to as acoustic measurement in some publications, only indirectly converts the standard-grain form [1] [2] required detection of a closed bubble chain. Thus, pressure drops in the interior of the filter may occur during the pressure-related evacuation of the filter pores, which already takes place below the bubble point pressure.
- • Monitoring of the filter breakthrough by the operator of the test: In this procedure, the standard is implemented exactly, but the operator himself is unreasonably burdened. On the one hand, the monitoring of the test liquid on rising bubbles requires constant high attention, on the other hand, the operator is often exposed to an inadmissibly high concentration of rising vapors from the test liquid. In addition, the subjectively judging operator introduces measurement uncertainties into the process, whereby a constant assessment of the investigated filter elements is no longer possible.
Damit ist kein Verfahren bekannt, welches die Prüfnormen [1][2] exakt umsetzt und gleichzeitig den Anforderungen des Arbeitsschutzes vollständig entspricht.Thus, no method is known which exactly implements the test standards [1] [2] and at the same time completely meets the requirements of occupational safety.
Technische AufgabeTechnical task
Der im Schutzanspruch 1 angegebenen Erfindung liegt das Problem zugrunde, eine Vorrichtung zu entwickeln, welche die in den Prüfnormen geforderte visuelle Unterscheidung zwischen Einzelblasen und Blasenketten automatisiert und objektiviert.The protection specified in
Zur normkonformen Prüfung z. B. von Filterelementen, und dabei insbesondere zur Bestimmung des Bubble-Point-Druckes und der Lokalisierung möglicher Fehlstellen, wird eine automatisierte Mess- und Prüfvorrichtung vorgeschlagen. Das Messsystem der Vorrichtung arbeitet entsprechend der Norm optisch und berührungsfrei.For standard-compliant test z. B. of filter elements, and in particular to determine the bubble point pressure and the location of possible defects, an automated measuring and testing device is proposed. The measuring system of the device operates according to the standard optically and without contact.
Zur Lösung dieser Aufgabe ist die Erfindung in Verbindung des Oberbegriffs des Schutzanspruchs 1 dadurch gekennzeichnet, dass in einer Flüssigkeit (
Zur Durchführung der optischen Erkennung werden eine oder mehrere Kameras und gegebenenfalls eine oder mehrere Beleuchtungseinheiten derart positioniert, dass der zu überwachende Flüssigkeitsbereich von der Optik der Kamera (
Die von der Kamera (
Zur Detektion der Blasen kann zusätzlich die Blasenposition im Bild und/oder Objektraum des Prüfbeckens (
Bei der Detektion und optischen Erfassung der aufsteigenden Blasen wird zur Verbesserung der Aufnahmequalität die Verwendung einer Beleuchtungseinheit (
Bei Durchführung von Bubble-Point-Tests kann die entwickelte Mess- und Prüfvorrichtung zusätzlich als Entscheidungskriterium herangezogen werden und so mit Hilfe des Ergebnisses direkt über das Bedienpanel für Steuereinheit (
Vorteileadvantages
Der besondere Vorteil der erfindungsgemäßen Lösung besteht darin, dass die Vorrichtung eine automatisierte Filterprüfung ermöglicht. Damit wird der Prüfvorgang objektiviert und beschleunigt, so dass von den bisher durchgeführten Stichproben nun zu einer durchgehenden Qualitätsüberwachung übergegangen werden kann. Der Vermessungsvorgang muss damit nicht mehr manuell durchgeführt werden sondern kann mit einer sehr hohen Genauigkeit visuell automatisch und unter wesentlich verbesserten Arbeitsschutzbestimmungen erfolgen.The particular advantage of the solution according to the invention is that the device enables automated filter testing. Thus, the inspection process is objectified and accelerated, so that from the previously performed samples can now be transferred to a continuous quality monitoring. The surveying process no longer has to be carried out manually, but can be carried out visually automatically and with significantly improved occupational safety and health regulations with very high accuracy.
Zitierte Nicht-PatentliteraturCited non-patent literature
-
[1]
ISO 2942:2004-08 ISO 2942: 2004-08 -
[2]
DIN ISO 4003:1977/1990 DIN ISO 4003: 1977/1990
Es zeigt:It shows:
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Prüfbeckentest tank
- 22
- Filterelementfilter element
- 33
- Flüssigkeitliquid
- 44
- Flüssigkeitssäuleliquid column
- 55
- Beleuchtungseinheitlighting unit
- 66
- Blasebladder
- 77
- Kameracamera
- 88th
- Auswerteeinheitevaluation
- 99
- Bedienpanel für SteuereinheitControl panel for control unit
- 1010
- Blasenkettebubble chain
- 1111
- Bubble-Point-DruckBubble point pressure
- 1212
- Flüssigkeitsoberflächeliquid surface
- 2020
- Mess- und Prüfvorrichtung mit Bubble-Point-TeststandMeasuring and testing device with bubble point test stand
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 Nicht-PatentliteraturCited non-patent literature
- DIN ISO 4003 [0003] DIN ISO 4003 [0003]
Claims (7)
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DE202016006152.7U DE202016006152U1 (en) | 2016-09-30 | 2016-09-30 | Measuring and testing device for the detection of bubbles in optically accessible liquids |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110455462A (en) * | 2019-08-20 | 2019-11-15 | 温州中润机电有限公司 | A kind of filter automatic checkout equipment |
CN111157420A (en) * | 2019-10-29 | 2020-05-15 | 超威电源集团有限公司 | Method for detecting through hole rate of AGM separator |
-
2016
- 2016-09-30 DE DE202016006152.7U patent/DE202016006152U1/en active Active
Non-Patent Citations (2)
Title |
---|
DIN ISO 4003:1977/1990 |
ISO 2942:2004-08 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110455462A (en) * | 2019-08-20 | 2019-11-15 | 温州中润机电有限公司 | A kind of filter automatic checkout equipment |
CN110455462B (en) * | 2019-08-20 | 2021-04-09 | 浙江海科信智能科技有限公司 | Automatic detection equipment for filter |
CN111157420A (en) * | 2019-10-29 | 2020-05-15 | 超威电源集团有限公司 | Method for detecting through hole rate of AGM separator |
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