WO2001089715A2 - System for representing a paint layer thickness distribution - Google Patents
System for representing a paint layer thickness distribution Download PDFInfo
- Publication number
- WO2001089715A2 WO2001089715A2 PCT/EP2001/005170 EP0105170W WO0189715A2 WO 2001089715 A2 WO2001089715 A2 WO 2001089715A2 EP 0105170 W EP0105170 W EP 0105170W WO 0189715 A2 WO0189715 A2 WO 0189715A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data processing
- information
- lacquer layer
- layer thickness
- processing device
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/001—Texturing; Colouring; Generation of texture or colour
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
-
- 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
- G06T2207/30156—Vehicle coating
Definitions
- the invention relates to a system for displaying the layer thickness distribution of a lacquer layer on the surface of an object.
- the layer thickness distribution of the paint layers is of crucial importance for the quality of the paint job.
- the required quality of painting is achieved when a certain minimum layer thickness is exceeded and a certain maximum layer thickness is not exceeded.
- simulations are used, among other things, that predict the painting result before objects are actually painted.
- the simulations are used in particular to optimize boundary parameters of the painting process with the aim that the painting result comes as close as possible to a certain ideal.
- the criteria used are, in particular, the most uniform possible paint layer thickness on the surface to be painted Avoiding falling below a certain minimum lacquer layer thickness for the purpose of ink coverage and avoiding exceeding a certain lacquer layer thickness to avoid the formation of drops in the lacquer.
- One possibility is to display the layer thickness along a measurement path as a sectional image.
- This form of representation is limited to a representation of a quasi one-dimensional path on the surface of the painted object and therefore does not give an overall impression of the painted surface.
- Another possibility is to present the paint layer thickness distribution as a colored area, the color intensity or differently selected colors representing the different paint layer thicknesses.
- the aim here is to improve a top view of an object by using colors.
- a third possibility is to display the paint layer thicknesses in a three-dimensional view as mountains.
- the overall impression is improved by a plastic representation for assessing the painted surface.
- this type of representation makes it difficult to identify actual layer thicknesses for, for example, those areas of the paint which are covered in the three-dimensional view by a layer thickness curve shown in the foreground, i.e., for example, the layer thickness of a comparatively thinly lacquered area, in the view behind a comparatively thickly lacquered area lies.
- a data processing device which contains at least one data memory in which simulated or measured data are stored and which represent the layer thicknesses at certain locations on the surface.
- a display device is assigned to the data processing device, on the display surface of which several views of the lacquer layer containing at least one plan view and two sectional images can be displayed side by side.
- a specific location on the surface can be selected in plan view, and the data processing device is set up for this, based on the x direction determined with the selection of the specific location, a first sectional image and to display a second sectional image of the lacquer layer in the y direction determined by the choice of the specific location.
- the display area of the display device is therefore advantageously divided in such a way that several views can be displayed simultaneously.
- the top view is the view for selecting the cutting planes for the two sectional images.
- the mouse pointer By recognizing a certain location to be assessed with regard to the lacquer layer in the top view, the mouse pointer, for example, can be positioned on this location in a particularly user-friendly manner. A selection is thus made and the corresponding coordinates or the coordinate axes assigned to the coordinates for the sectional images are defined.
- the values for the paint layer thicknesses assigned to the coordinate axes are correspondingly displayed on the views as sectional images.
- the information on the coating layer thickness distribution from the top view and the sectional images together contain all the essential information for assessing the coating at the selected location or in the section shown.
- the coordinate axes often form a Cartesian system. However, this is not absolutely necessary. If it proves useful for a certain object or its representation, the coordinate axes can be free have selectable angles to each other or follow another coordinate system, for example a system with polar coordinates.
- the system according to the invention thus achieves that the layer thickness distribution is graphically displayed in a particularly useful manner.
- the surface or the surface shape of an object to be painted is transformed into a two-dimensional, flat shape.
- the corresponding first information about the two-dimensional, flat shape is stored in a first file or in a first area of the data processing system, this first information then being available independently of other information about the surface to be painted, for example the respective paint layer thicknesses.
- the actual shape of the surface to be painted can have any spatial shape, but is converted into a two-dimensional, flat shape for data storage.
- the information about the two-dimensional, flat shape is stored as color information in the first file or in the first area of the data processing system.
- a virtual, flat surface can be defined by assigning it a color or a color value for the data processing system, for example white or the color value 255, which corresponds to the color white.
- the two-dimensional, flat shape of the surface to be painted within the two-dimensional, flat surface is defined by storing a different color or a different color value than white, or 255, for those points of the virtual, flat surface that are part of the two-dimensional, flat shape are.
- second information in particular about the layer thicknesses for certain locations on the object to be painted, is stored. It is only of secondary importance for the invention whether the second information comes from a measurement or from a painting simulation.
- the second information is available, for example, as color values that correspond to specific lacquer layer thicknesses or as numerical information about lacquer layer thicknesses.
- the systems which provide the information mentioned for example computers or measuring systems specially designed for this purpose, can work independently of one another.
- the first and second information can in particular use a different resolution or a different information depth, these different resolutions or information depths being adaptable to one another by the system according to the invention, for example by data stretching or compression of the first information up to congruence with the second information.
- the matched first and second information can then be superimposed particularly easily.
- a second piece of information for example a color value that characterizes the thickness of the lacquer layer, can replace the corresponding color value of the first piece of information for this selected point for a specific location.
- the result of the superimposition can be represented according to the system according to the invention, in particular on the display device of the data processing system.
- FIG. 1 shows a representation of a layer thickness distribution using the system according to the invention
- FIG. 2 shows a two-dimensional object image
- Fig. 3 shows the object image with superimposed paint layer thickness distribution
- FIG. 4 shows a representation of a coating layer thickness distribution.
- 1 shows a representation of a lacquer layer thickness distribution by means of the system according to the invention with a circularly lacquered area 10 of a surface 12 in a first view 14.
- the lacquered area 10 is deliberately chosen to be inhomogeneous in order to show that the different lacquer layer thicknesses are caused by different shades of gray can be displayed. Equivalent to this, different colors, color palettes or color gradations can be selected to indicate different thicknesses of the lacquer. In the aforementioned cases, there is a connection between a specific color or a specific color and a lacquer layer thickness assigned to this color or this color, or a lacquer layer thickness range.
- the first view 14 shows an x-axis 16 and a y-axis 18 which intersect at an arbitrarily chosen point 20.
- the position of both axes 16, 18 can be freely selected, for example by specifying corresponding x or y values or by positioning a mouse pointer in a screen display on a computer.
- a third view 28 with a third x-axis 30 and a third y-axis 32 is arranged laterally in the axis extension of the y-axis 18 next to the first view 14.
- the structure and the statement of the third view 28 are comparable to those of the second view 22, with the difference that a second distribution curve of the lacquer layer thickness 34 indicates the corresponding distribution along the x-axis 16.
- the y Axis 18 is shown extended into the third view, so that it can also be seen here which lacquer layer thickness is present at the point assigned to the intersection 20.
- a fourth view 36 is arranged in the area that lies in the extension of the second y-axis 26 and in the extension of the third x-axis 30.
- the fourth view is provided to show general information about the wide and third views 22, 28, such as minimum and maximum thickness values of the lacquer layers under consideration.
- lacquer layer thickness of the point currently being viewed at the intersection 20 can also be represented in the first, second or third view 14, 22, 28.
- FIG. 2 shows a two-dimensional object image 40, a two-dimensional image of a side view of a side element of a motor vehicle body.
- the object image 40 is stored in a memory as a shape specification for the method according to the invention, for example as a graphic in pixel form with a certain resolution.
- Another advantage is that any object images can be imported into the system without having to use special CAD tools.
- FIG. 4 shows a representation of a paint layer thickness distribution for a region of the motor vehicle body from FIGS. 2 and 3.
- the structure of the representation is as in FIG. 1 with the first, second, third and fourth views 14, 22, 28, 36 ,
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001262267A AU2001262267A1 (en) | 2000-05-24 | 2001-05-08 | System for representing a paint layer thickness distribution |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10025692.9 | 2000-05-24 | ||
DE10025692A DE10025692A1 (en) | 2000-05-24 | 2000-05-24 | System for displaying a coating layer thickness distribution |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001089715A2 true WO2001089715A2 (en) | 2001-11-29 |
WO2001089715A3 WO2001089715A3 (en) | 2002-04-18 |
Family
ID=7643378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/005170 WO2001089715A2 (en) | 2000-05-24 | 2001-05-08 | System for representing a paint layer thickness distribution |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2001262267A1 (en) |
DE (1) | DE10025692A1 (en) |
WO (1) | WO2001089715A2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5001353A (en) * | 1989-01-17 | 1991-03-19 | Sumitomo Light Metal Industries, Ltd. | Method and apparatus to measure the thickness of coating films |
US5895439A (en) * | 1996-10-15 | 1999-04-20 | Southwest Research Institute | Method for generating and displaying complex data derived from non-destructive evaluation scanning |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2893078B2 (en) * | 1990-12-06 | 1999-05-17 | オムロン株式会社 | Shading correction method and device |
US5306306A (en) * | 1991-02-13 | 1994-04-26 | Lunar Corporation | Method for periprosthetic bone mineral density measurement |
JP2644935B2 (en) * | 1991-07-25 | 1997-08-25 | 株式会社日立製作所 | Terrain information processing method and device |
-
2000
- 2000-05-24 DE DE10025692A patent/DE10025692A1/en not_active Ceased
-
2001
- 2001-05-08 WO PCT/EP2001/005170 patent/WO2001089715A2/en active Application Filing
- 2001-05-08 AU AU2001262267A patent/AU2001262267A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5001353A (en) * | 1989-01-17 | 1991-03-19 | Sumitomo Light Metal Industries, Ltd. | Method and apparatus to measure the thickness of coating films |
US5895439A (en) * | 1996-10-15 | 1999-04-20 | Southwest Research Institute | Method for generating and displaying complex data derived from non-destructive evaluation scanning |
Also Published As
Publication number | Publication date |
---|---|
AU2001262267A1 (en) | 2001-12-03 |
WO2001089715A3 (en) | 2002-04-18 |
DE10025692A1 (en) | 2001-11-29 |
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