WO2003060433A2 - Verfahren zur erfassung der lage grenzfläche zwischen zwei medien - Google Patents
Verfahren zur erfassung der lage grenzfläche zwischen zwei medien Download PDFInfo
- Publication number
- WO2003060433A2 WO2003060433A2 PCT/AT2003/000014 AT0300014W WO03060433A2 WO 2003060433 A2 WO2003060433 A2 WO 2003060433A2 AT 0300014 W AT0300014 W AT 0300014W WO 03060433 A2 WO03060433 A2 WO 03060433A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- interface
- container
- media
- medium
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 42
- 239000010802 sludge Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 24
- 230000006870 function Effects 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 12
- 239000003086 colorant Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000003760 hair shine Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000004062 sedimentation Methods 0.000 description 9
- 230000005501 phase interface Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- 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
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/136—Segmentation; Edge detection involving thresholding
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
Definitions
- the invention relates to a method for detecting the position of the interface between two media in a container, in which the container transmits light, the radiation that has passed through the container, converted into an image file and evaluated with respect to the height of the interface becomes.
- fillers are used in which the foam generation is precisely regulated even under changing operating conditions and with pressure relief devices that work differently.
- at least one stationary video camera with a downstream image evaluation device is used to determine the foam image within the relief sector and / or on the container discharge devices.
- the image evaluation device monitors the containers when the fill level in the container matches a stop level; ' which is indicated on the monitor image with a dashed line.
- the image evaluation device recognizes this and sends a closing signal to that container location via the central control line.
- the filling level of liquids in bottles is carried out by comparing the current filling level with the desired filling level during the filling process.
- the liquid level is measured in translucent containers, the device using two cameras and two light sources, which are each arranged on opposite sides of the measuring vessel. Diffuse light is radiated from a position below the liquid surface against the liquid surface. The light reflected from the liquid surface and refracted at the liquid surface is recorded by a camera and the average value is calculated from both sides.
- This embodiment has the disadvantage that the device necessary for the measuring process is very complex.
- the sludge level in a sedimentation basin is determined, a measuring body being continuously lowered into the liquid to be measured and an image taken by a stationary camera after digitization in a downstream computer with the actually measured path of the measuring body is compared.
- the one from that Measuring body from the surface of the liquid to the point at which the sludge particle density has reached a level which reduces the passage of light so much that the measuring body is no longer visible; the distance traveled is a measure of the height of the liquid above the sludge level.
- a jump in the decrease in the brightness of the images recorded by the camera indicates the immersion of the measuring body in the deposited sludge.
- DE 4 314 249 AI discloses a device for detecting the liquid level in a translucent container during the filling process, which has a light source for irradiating the container and a device for receiving and evaluating the radiation that has passed through the container, with the light source in the beam path a diffuser is arranged.
- the light which has passed through the container is then collected with the aid of a lens and recorded by means of a camera which emits a video signal to a processing unit, where the image is evaluated line by line with regard to a minimum brightness.
- This embodiment has the disadvantage that a line lens must additionally be arranged between the sample to be measured and the camera, which makes the measuring device more complicated and expensive.
- only differences in the brightness of the image are assessed for line-by-line image evaluation, as a result of which no exact result can be obtained.
- the measurement setup requires the existence of a sharp linear transition between the gaseous phase and the liquid phase.
- the present invention has for its object to provide an accurate location of a border zone, z. B. between two immiscible media.
- the stated object is achieved according to the invention while avoiding the aforementioned disadvantages in that an overall image of the measuring container is generated for processing and evaluation of the video image after digitization and the entire image information, in particular the brightness, the color intensity and the color, is simultaneously evaluated in terms of area.
- This configuration achieves a highly precise result while at the same time dispensing with complex test arrangements.
- an area compensation is carried out, in which a binary image is generated by defining threshold values and the interface contours are tightened by using filter functions, in particular by particle classification.
- This configuration has the effect that the contours of all surfaces recognizable in the image, such as the liquid surface, sludge surface and cylinder walls, are defined for further image processing and the morphology of the image is improved for the evaluation.
- Color image is and the definition of the threshold value is based on the color intensity of the captured image.
- This embodiment likewise effects a binary segmentation in a color image in order to form clear interface representations.
- Another embodiment of the invention provides that the video image is a color image and a threshold value is used for each of the three screen colors red, green, blue (RGB colors). Such an embodiment achieves binary segmentation in a color image to form clear interface representations.
- the particle classification in a dynamically changing particle zone is carried out by coloring particles which are assigned to the same size range in uniform layers, layers e.g. Colors are.
- Such a configuration has the effect that the size distribution of the particles can be optically determined by color differentiation on the screen.
- a next embodiment of the invention provides that in the course of the particle classification, particles which are to be assigned to an order of magnitude below a defined limit are eliminated from the image. Such an embodiment ensures that the interfaces can be determined more precisely.
- a further embodiment of the invention consists in that a sequence of classification steps is used to determine the limit value for the particles to be separated out in a dynamically changing particle zone, the Limit values are set subjectively by the user and this sequence of steps is fixed in the so-called "label function".
- label function Such an embodiment has the effect that, depending on the individual size distribution of the particles and individual questions, an adequate label function and thus a limit value for the excretion the particle can be determined from the picture.
- a next embodiment consists in that predefined size classes of the particles to be separated out are deleted from the image. This embodiment provides a simple way of separating the particles from the image. In a further embodiment of the invention it is provided that for determining the
- an intersection of the interface representation is generated with a preferably vertical line. This configuration ensures that the height to be determined is automatically determined precisely from the bottom of the container to the interface.
- the distance of the intersection point from the bottom of the container takes place in pixels to denote the determined position of the interface.
- a next embodiment is that the pixel value is converted into a metric unit.
- This embodiment makes it possible to specify the size sought, for example the sedimentation height, in millimeters.
- the specification in millimeters can be converted into a specification in milliliters, taking into account the size of the bottom surface of the container.
- one of the two media is suspended particles and the other is a liquid, in particular the carrier liquid of the suspended particles.
- the particle suspension is sludge. This embodiment ensures that the sludge volume, for example of aerobic activated sludge, at freely selectable intervals and during a freely definable settling time.
- a next embodiment is that one of the two media is gaseous and the other medium is solid, the solid medium being transported in the gaseous medium.
- This configuration causes the volume of solid particles carried in a gas, e.g. Dust in air (e.g. in a cyclone
- Dust separation can be determined.
- Media is gaseous and the other medium is liquid, the gaseous medium being the carrier medium for the liquid medium.
- a liquid in a gas e.g. Water in air
- a next embodiment of the invention provides that a sequence of values for the position of the interface is obtained by periodic image recording and these values are combined to form a settling curve. Such an embodiment provides a more detailed characterization of the sedimentation behavior.
- FIG. 2 shows a detail of the diagram from FIG.
- FIG. 3 shows a view of the user interface of the control program used in the method according to the invention
- FIG. 4a shows a schematic representation of the function of two control displays from FIG. 4,
- the method shown schematically in Fig.l is used to detect the position of the interface between two media in a container, which is shown in the Exemplary embodiment is a measuring cylinder 1.
- the measuring cylinder 1 is filled by a pump 3 via the cylinder base 33 with 1000 ml of activated sludge.
- a check valve 4 is arranged in front of the pump 3 in order to prevent the pump 3 from running dry.
- the desired fill level of 1000 ml is achieved by means of a proximity initiator 5, which is arranged on the outside of the measuring cylinder 1, on the side facing the cylinder head 27.
- the proximity initiator 5 is mounted on the outside of the measuring cylinder 1 in order to prevent possible impairment of the measurement result by the proximity initiator 5 protruding into the measuring range.
- an overflow 6 is formed, so that there is not too much activated sludge left in the vessel, which could falsify the measurement result.
- the measuring cylinder 1 is irradiated with light.
- the light comes from a light source 22 which is arranged on the opposite side of the measuring cylinder 1 as seen from the video camera 20.
- the light source 22 is formed by a fluorescent tube.
- a diffuser 23 in the exemplary embodiment shown a milk glass pane, is arranged between the measuring cylinder and the light source 22.
- the image recording unit 28 is housed to ensure uniform lighting conditions.
- the radiation that has passed through the container is recorded by a video camera 20 in an adjustable time interval and converted into a video image 24.
- This video image 24 is then evaluated with regard to the position of the interface 26 with respect to the height.
- the entire image information in particular the brightness and the color, is used for processing and evaluating the video image 24, possibly after digitization.
- an area compensation is carried out, in which a binary image 25 is generated by defining threshold values and by using filter functions, in particular by particle classification, the interface contours are sharpened.
- the threshold value is defined via the
- Brightness or the color intensity of the captured image In the case of a color image, a threshold value is used for the three screen colors red, green and blue (RGB colors).
- Particle classification is carried out in the program by assigning the same colors to particles that are assigned to the same size range, which means that the same size ranges of particles appear in uniform layers. In the course of particle classification, particles that can be assigned to an order of magnitude below a defined limit are eliminated.
- a sequence of classification steps (the so-called "label function") is used to determine the limit value for the particles to be separated out.
- the limit value is subjectively determined by the user and fixed in the "label function”.
- the orders of magnitude of the particles to be eliminated are deleted from the image.
- an intersection 30 of the illustrated interface 25 with a preferably vertical line 29 is generated in the processed video image 25.
- the distance of the intersection 30 from the bottom 31 of the container is given in pixels.
- the pixel value is then converted into a metric unit.
- This recording and processing cycle can then be repeated any number of times until, in the exemplary embodiment shown, the last picture is taken after 30 minutes. Following the respective image acquisition, the image is forwarded digitally to the image processing unit and processed. The sedimentation height is then determined.
- the method according to the invention can also be carried out without a digital video camera. In this case, the connection between a conventional analog video camera and the computer is established by a frame grabber card, which converts the analog camera signals into a digital image.
- the method can be used wherever there are settable substances in a medium, provided that this process can be recorded with a camera.
- the method is used when one of the two media is a particle suspension and the other is a liquid, in particular the carrier liquid of the particle suspension.
- the sludge volume of aerobic activated sludge is measured in a sewage treatment plant. After a sedimentation time of 30 minutes, the amount of sludge deposited is determined by determining the position of the interface between the sludge and the supernatant in ml. Periodic image acquisition gives a sequence of values for the position of the interface and these values are combined to form a settling curve.
- the measuring cylinder 1 is emptied via an outlet 7, which is controlled by a solenoid valve 8, after the measurement has taken place.
- the measuring cylinder 1 is then cleaned with a spray can 9, the feed line 10 of which is provided via the cylinder head 27.
- the rinse water is fed from a service water connection 11.
- detergent is added from a container 13 via a metering pump 14 in order to improve the cleaning step.
- the process water is deionized by an ion exchanger cartridge 16 and stored in a rinsing water tank 17.
- the deionized rinsing water is fed to the spray device 9 via the feed line 18 with a pump 19.
- FIG. 3 shows a view of the user interface of the control program "Lab View” from National Instruments used in the method according to the invention.
- "Lab View” is a graphic programming language which is based on the language “G”, which is comparable to C ++ Programming in "Lab View” is done by linking the individual sub-programs.
- the license holder can use a compiler to produce so-called stand-alone executables.
- B. can be passed on to users and customers.
- the stand-alone executables enable you to work with the "LabView” program without - the user having to buy the entire "LabView” package.
- Executables can be designed individually.
- the embodiment variant of the user interface shown in FIG. 3 is described below to illustrate some program functions that are essential for the application of the method according to the invention.
- Control "and" Automatic Control arranged.
- the function of the "manual control” is selected, which is arranged in a window below the buttons mentioned above.
- the window for manual control shows in the sub-window relay switches and indicator lights for each of the selected control functions: sludge feed pump (abbreviated: PS), return pump (PS back), solenoid valve water ON (MW on), solenoid valve water AB (MW down), metering pump (PF) double-row control lights, in the lower part of the window for the function of the "Manual control” is a selection option for the number of repetitions of the image acquisition and further image processing.
- a window that provides information about the selected program function.
- it is the "sludge return" function.
- two windows arranged side by side, with a control lamp for In the other window, the fill level of the tank in which the medium (s) to be measured is located is shown graphically.
- a window with the results of the settling volume in ml each in 5 -Minute intervals, from 0 min to 30 min, are shown in table form.
- a stop button at the top that stops the program.
- FIG. 4 shows a view of the user interface of the image processing program IMAQ used in the method according to the invention, which is a construction module of the control program “Lab View”.
- Fig.4a The function of these control displays is shown schematically in Fig.4a.
- the lower area of the window is again divided into two and consists of a window with two displays.
- the middle area two windows are arranged over the entire length of the screen, displaying the images of the measuring cylinder, the left image representing the unprocessed output image 24 and the right one the processed new image 25 (binary image).
- the binary image 25 is reduced to the interface 26 between the liquid and the deposited sludge.
- the distance of the intersection 30 from the bottom 31 of the container is given in pixels.
- the pixel value is converted into a metric unit by the program and shown in the display “distance” described above.
- the function of the control displays “Distances” and “Edge Coordinates” from FIG. 4 is shown schematically in FIG. 4a.
- the measuring cylinder 41 is the Sludge-water suspension, the sludge particles having already settled and thus two phase interfaces, namely air / water 43 and water / sludge 46, can be seen.
- the image processing program places a scale 42 lengthwise over the recorded video image of the measuring cylinder 41. The functions of the program automatically recognize the respective phase interfaces.
- phase interfaces for example a second water / sludge interface 48.
- Each detected phase interface is indicated on the scale line by a node 45, 45, 47 at the respective intersection between the phase interface and the scale.
- the nodes 44, 45, 47 are ranked according to their distance from the zero point.
- the "Distances" window now specifies the distances of the individual nodes 44, 45, 47 from the water surface 43, ie from the zero point of the scale 42.
- the number of the desired node can be selected using the mouse pointer.
- the "Edge Coordinates" window the number of the desired node can be selected.
- the program calculates the x, y coordinates for the selected node (intersection interface / scale) and displays them in the image.
- the device shown in FIGS. 1 and 2 for carrying out the method according to the invention was used to determine the settling behavior of a laboratory sewage treatment plant.
- parallel sedimentation tests were carried out with the measuring device and by means of manual determination in the settling cylinder.
- the activated sludge was removed from the activated sludge tank at the same time. While in the method according to the invention the sludge was conveyed into the measuring cylinder 1 via the pump 3, the sludge was manually removed from the activation tank for the comparison measurement.
- the results of the two measurements carried out in parallel are summarized in table form in FIG. The columns in the table in FIG.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Electromagnetism (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Quality & Reliability (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003205409A AU2003205409A1 (en) | 2002-01-16 | 2003-01-16 | Method for detecting the position of the interface between two media |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA65/2002 | 2002-01-16 | ||
AT652002 | 2002-01-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003060433A2 true WO2003060433A2 (de) | 2003-07-24 |
WO2003060433A3 WO2003060433A3 (de) | 2003-12-24 |
Family
ID=3587131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2003/000014 WO2003060433A2 (de) | 2002-01-16 | 2003-01-16 | Verfahren zur erfassung der lage grenzfläche zwischen zwei medien |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2003205409A1 (de) |
WO (1) | WO2003060433A2 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008118016A1 (en) * | 2007-03-23 | 2008-10-02 | Coöperatie Avebe U.A. | Chromatographic column system |
WO2010080340A1 (en) | 2009-01-06 | 2010-07-15 | Siemens Healthcare Diagnostics Inc. | Methods and apparatus for determining a liquid level in a container using imaging |
WO2014163509A1 (en) | 2013-04-04 | 2014-10-09 | Univisual-Instruments As | System and method for determining fluid levels interfaces |
JP2019018196A (ja) * | 2017-07-20 | 2019-02-07 | 株式会社神戸製鋼所 | 流体流通装置及びその流通異常検知方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3441737A (en) * | 1965-06-10 | 1969-04-29 | Bowser Inc | Radiation sensitive sludge level testing device |
DE4036048A1 (de) * | 1989-11-14 | 1991-05-16 | Franz Raab | Verfahren und vorrichtung zum bestimmen der schaumhoehe oder der sedimentationshoehe in fluessigkeiten |
EP0544428A1 (de) * | 1991-11-25 | 1993-06-02 | Miller Brewing Company | Verfahren und Vorrichtung zur Analyse von Schaum |
DE4314249A1 (de) * | 1993-04-30 | 1994-11-03 | Maz Mikroelektronik Anwendungs | Vorrichtung zur Erfassung des Flüssigkeitspegels |
EP0655610A2 (de) * | 1993-11-24 | 1995-05-31 | SCHWARTZ, Nira, Dr. | Verfahren zur dynamischen Flüssigkeitspegel- und Blaseninspektion zur Gütekontrolle und Prozesssteuerung |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08178729A (ja) * | 1994-12-22 | 1996-07-12 | Nishiyama Seisakusho:Kk | 粒子沈殿体積計測装置 |
-
2003
- 2003-01-16 WO PCT/AT2003/000014 patent/WO2003060433A2/de not_active Application Discontinuation
- 2003-01-16 AU AU2003205409A patent/AU2003205409A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3441737A (en) * | 1965-06-10 | 1969-04-29 | Bowser Inc | Radiation sensitive sludge level testing device |
DE4036048A1 (de) * | 1989-11-14 | 1991-05-16 | Franz Raab | Verfahren und vorrichtung zum bestimmen der schaumhoehe oder der sedimentationshoehe in fluessigkeiten |
EP0544428A1 (de) * | 1991-11-25 | 1993-06-02 | Miller Brewing Company | Verfahren und Vorrichtung zur Analyse von Schaum |
DE4314249A1 (de) * | 1993-04-30 | 1994-11-03 | Maz Mikroelektronik Anwendungs | Vorrichtung zur Erfassung des Flüssigkeitspegels |
EP0655610A2 (de) * | 1993-11-24 | 1995-05-31 | SCHWARTZ, Nira, Dr. | Verfahren zur dynamischen Flüssigkeitspegel- und Blaseninspektion zur Gütekontrolle und Prozesssteuerung |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11, 29. November 1996 (1996-11-29) & JP 08 178729 A (NISHIYAMA SEISAKUSHO KK), 12. Juli 1996 (1996-07-12) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008118016A1 (en) * | 2007-03-23 | 2008-10-02 | Coöperatie Avebe U.A. | Chromatographic column system |
US7927487B2 (en) | 2007-03-23 | 2011-04-19 | Cooperatie Avebe U.A. | Chromatographic column system |
WO2010080340A1 (en) | 2009-01-06 | 2010-07-15 | Siemens Healthcare Diagnostics Inc. | Methods and apparatus for determining a liquid level in a container using imaging |
EP2373957A1 (de) * | 2009-01-06 | 2011-10-12 | Siemens Healthcare Diagnostics Inc. | Vorrichtung und verfahren zur bestimmung eines flüssigkeitsstandes in einem behälter durch bilderzeugung |
EP2373957A4 (de) * | 2009-01-06 | 2012-07-18 | Siemens Healthcare Diagnostics | Vorrichtung und verfahren zur bestimmung eines flüssigkeitsstandes in einem behälter durch bilderzeugung |
US9002096B2 (en) | 2009-01-06 | 2015-04-07 | Siemens Healthcare Diagnostics Inc. | Method and apparatus for determining a liquid level in a container using imaging |
WO2014163509A1 (en) | 2013-04-04 | 2014-10-09 | Univisual-Instruments As | System and method for determining fluid levels interfaces |
JP2019018196A (ja) * | 2017-07-20 | 2019-02-07 | 株式会社神戸製鋼所 | 流体流通装置及びその流通異常検知方法 |
EP3636339A4 (de) * | 2017-07-20 | 2021-01-13 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Fluidströmungsvorrichtung und verfahren zur erkennung von strömungsfehlern |
US11413595B2 (en) | 2017-07-20 | 2022-08-16 | Kobe Steel, Ltd. | Fluid flow device and flow error detection method |
Also Published As
Publication number | Publication date |
---|---|
AU2003205409A1 (en) | 2003-07-30 |
AU2003205409A8 (en) | 2003-07-30 |
WO2003060433A3 (de) | 2003-12-24 |
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