Classifications

• • 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
  • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
  • G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
  • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
  • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
  • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
  • G01J3/504—Goniometric colour measurements, for example measurements of metallic or flake based paints
• • 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
  • G01N21/8806—Specially adapted optical and illumination features
• • 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
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
  • G01J3/02—Details
  • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
  • G01J3/0224—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using polarising or depolarising elements

Definitions

• the invention relates to a method for mobile online and offline control of colored and high-gloss automotive part surfaces.
• quality parameters such as color, gloss, layer thickness and wave (waviness) for various properties, dependencies and parameters.
• commercial hand-held measuring devices are used, such as the X-Rite MA 68 II angle spectrometer, gloss measuring devices such as Wave Scan plus from BYK-Gardner GmbH, 82534 Geretsried.
• test coatings - so-called test panels - are usually produced and the optical properties to be examined - color, gloss, layer thickness and wave - of the coating are determined and the interdependencies of the coating properties are analyzed. As a rule, this is done in the laboratory or in production on a random basis using the measurement methods and devices mentioned.
• DE 19709406 A1 discloses a method and a device for measuring coated test panels that determine the surface quality - color, gloss, layer thickness and wave - using laboratory robots in combination with a corresponding measurement method.
• a disadvantage of this method and its device is the assessment of the measurement results on the basis of test boards which do not take into account the geometrical shapes of the automotive part surfaces and therefore only indirectly allow conclusions to be drawn about the quality assessment.
• DE 19717593 A1 describes a measuring method for assessing the surface quality of motor vehicle bodies that touches the surface of Series of automatically coated motor vehicle parts in connection with a multi-axis robot along pre-programmed routes.
• Disadvantages of this invention are the high investment costs with regard to the robot required for use and the associated program connections for controlling the measurement process along the surface of the automobile part to be measured, as well as its stationary connection.
• non-contact measurement methods with cameras are known from the prior art, which are directed at defined angles to the surface of the automobile part to be measured and which are measured under different illuminations and illumination angles.
• the invention has for its object to provide a method with the features of the preamble of claim 1 such that a mobile online and offline control of the quality of colored and high-gloss automotive part surfaces can be determined and the parallel measurement of the parameters color, gloss, layer thickness and wave can be structured quickly and according to different requirements.
• the measuring beam formed by polarized light at different wavelengths is thus the measuring beam of the angle-dependent spectrophotometer, which is combined with a reference beam of the angle-dependent spectrophotometer and contains the reflection, interference, depolarization and phase values of the measured automotive part surface at different wavelengths as surface information. are the optical surface states of the automotive part surfaces that map precisely.
• the electronic camera system is designed as an image recognition system that recognizes the shape and position of the automobile part surfaces to be measured optically spectrophotometrically and by means of the electronic database, which is designed as an optical neuro-fuzzy structured image database, performs shape and position identification and one on it Shape and position defined optical angle-dependent spectrophotometric measurement for the identified and classified automotive part surface under predetermined measurement parameters such as wavelength, measurement angle, type of combined measurement - ie Color, gloss, layer thickness and wave measurement - and scanning scanning initialized.
• the form of identification of the automotive part surfaces is done by electronic classes of automotive part surfaces, which are stored in the optical neuro-fuzzy structured image database.
• the neuro-fuzzy techniques have been used for years in different areas of industry for the modeling, analysis, monitoring and control of industrial processes and are generally known from the literature.
• the method according to the invention stands out in that it is faster, fulfills more extensive object-specific measurement requirements and allows classified measurement tasks with regard to the automotive part surfaces.
• an optical neuro-fuzzy structured image database in which the automobile part surface images are stored with the associated measurement method.
• a camera image for comparing the image pattern of the automobile part surface permits assignment and / or classification of the measurement object and, after object detection, controls the object-specific measurement method of the angle-dependent gene spectrophotometer for integral color, gloss, layer thickness and wave measurement with regard to the identified automotive part surface.
• Deviations in color, gloss, layer thickness and wave of the measured automobile part surfaces, including various automobile parts, are stored in a computer-aided optical quality database, called the CAOQ database, for object and component-specific storage for optical characterization.
• this CAOQ database calculates, compares and manages logical links of the color, paint gloss, layer thickness and wave data measured integrally to different object points of the different automotive part surfaces with specified requirement data records on the part of the target data, which are used by the automobile manufacturers as target values and tolerances for the automotive part surfaces are specified.
• the data is transmitted to a control center for surface measurement technology via an intelligent neural network using standardized statistical methods, outlier analysis, graphic representation of the color, gloss, layer thickness and wave differences and can be visualized to an operator, so that an understandable and actionable decision on quality issues of individuals measured automobile part surfaces can be taken by the operator at the control center for surface measurement technology.
• at least two mobile online and offline control methods of the type described are used in production at different locations and are connected to the control center for surface measurement technology via the intelligent neural network.
• the data and decisions recorded by the control center for surface measurement technology are transmitted to the production planning system, called PPS, via data transmission and the automotive part is stored specifically electronically.
• the production planning system records deviations in color, gloss, layer thickness and wave, and the values determined in accordance with the method are fed back electronically via the network to the automotive coating / coating production unit, so that the determined deviations are incorporated into corresponding changes in the automotive coating / coating process ,
• the transport system for the next automobile part surface to be measured is controlled in a timed manner. Furthermore, the data of a customer information system via network are routed to the car manufacturer online übermit- 1 telt data from the suppliers.
• FIG. 1 shows a schematic representation of a device for carrying out the method for the mobile online and offline control of colored and high-gloss automotive part surfaces.
• automobile part surfaces 1a-1c are produced and transported by a transport system 18 to the mobile in-and offline control.
• the automobile part surface 1 b to be measured, for example, is optically recorded with a camera 2.
• the output 3 of the camera 2 carries a pixel image signal with respect to the automobile part surface 1 b and its shape.
• This information which comprises a surface image containing the pixel image and depicting the automobile part surface 1b in detail, is fed to an optical neuro-fuzzy structured image database 4 in which automobile part surface classes are electronically stored.
• the real automotive part surface images are compared with the automotive image classes of the image database 4 stored there, and after recognizing the automotive part surface 1b, the measurement method associated with the object class for online and offline control of the colored and high-gloss automotive part surface 1b for the optical surface determination of color, gloss, layer thickness and wave with radio-assisted initialization 5a and the angle-dependent spectrophotometer 6 started for scanning with the measuring beam 7a under object-specific settings; At the same time, the initialization 5b of the computer-aided optical quality database 11 for data acquisition of the detector signal 10 takes place by radio.
• the measuring beam 7a formed with polarized light of different wavelengths from the angle-dependent spectrophotometer scans the automobile part surface 1b.
• the depolarized measuring beam 7b reflected by the automotive sub-surface 1b reaches the angle-dependent spectrophotometer 6 with detector unit 8, which is a CCD diode array.
• detector unit 8 which is a CCD diode array.
• the output 9 of the detector unit 8 carries a detector signal 10 with regard to the surface states of color tone, lacquer gloss, layer thickness and wave.
• This detector signal which comprises reflection, interference, polarization and phase information, and the surface state of the automotive part surface 1b in its values of color, gloss, layer thickness and wave, is called a computer-aided optical quality database 11, CAOQ, supplied, the initialization 5b is carried out by radio from 4.
• This CAOQ database 11 calculates, compares and manages the detector signals 10 at different object points on the automobile part surface 1b and generates color, gloss, layer thickness and wave data which are compared with the requirement data records specified by the automobile manufacturer. These data are transmitted to different addressees by an intelligent neural network 12, which links at least two mobile online and offline control methods 13 of the type described, and can be visualized on at least one control center for surface measurement technology 14. In the next step, the data recorded by the control center for surface measurement technology 14 are called the production planning system 15, PPS, transmitted through an electronic network and the automotive part is stored electronically specifically.
• the deviations in the color, gloss, layer thickness and wave data recorded in the production planning system 15 are transmitted to the automobile coating / coating production unit 16 and / or to the customer information system 17 by a further electronic network, so that necessary measures relating to the automotive coating / coating can be initiated in 16;
• the transport system 18 for the automotive parts is controlled and timed by the production planning system 15, so that the following automotive part surface 1 c can be recorded and measured in accordance with the method described above.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• General Health & Medical Sciences (AREA)
• Pathology (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Biochemistry (AREA)
• Immunology (AREA)
• Computer Vision & Pattern Recognition (AREA)
• Signal Processing (AREA)
• Engineering & Computer Science (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
• Length Measuring Devices By Optical Means (AREA)
• Investigating Or Analysing Materials By Optical Means (AREA)
• Spectrometry And Color Measurement (AREA)
• Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Applications Claiming Priority (3)

Publications (1)

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• 2001
  • 2001-12-21 DE DE10163596A patent/DE10163596C1/de not_active Expired - Fee Related
• 2002
  • 2002-04-16 EP EP02732624A patent/EP1456629A2/de not_active Withdrawn
  • 2002-04-16 US US10/497,468 patent/US7298462B2/en not_active Expired - Fee Related
  • 2002-04-16 CZ CZ2004824A patent/CZ2004824A3/cs unknown
  • 2002-04-16 WO PCT/EP2002/004192 patent/WO2003054529A2/de not_active Ceased
  • 2002-04-16 PL PL02369147A patent/PL369147A1/pl unknown
  • 2002-04-16 JP JP2003555193A patent/JP4024758B2/ja not_active Expired - Fee Related

Patent Citations (2)

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