Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

CeBIT: TopDocuMation – a test system for painted components of all sizes

25.02.2014
Whether city bus or luxury coach: the one thing that all buses have in common is large surfaces that lend themselves to attracting attention with special paintwork or advertising. In the production of these vehicles, stringent quality control of the painted surfaces with its multitude of visual designs is therefore essential.

At CeBIT the Fraunhofer IOSB will present a test method that is also ideally suited for reflective surfaces and which simplifies the tester’s work with an integrated intuitive gesture control system.


The deflectometric measurement method also allows for the inspection of large components with reflective surfaces.

Photo: Manfred Zentsch © Fraunhofer IOSB


Here, as an example, a section of a bus hatch: A comparison of the recorded image with a master image (for example from CAD image) yields an image showing the differences between the two.

© Fraunhofer IOSB

The advantage of the deflectometric procedure over other 3D methods, such as triangulation and “shape from shading”, lies in that it examines not the surface itself but its mirror image. A graphic pattern consisting of either black-and-white stripes or a chess-board pattern is displayed on a screen. One or more cameras record images of the pattern’s reflection on the component’s surface. This can be compared with a human examiner, who views a reflecting object from various angles to detect surface defects.The object’s surface topography is then determined by a “measuring point cloud” that can be used to generate an FEM (finite element method) model of the surface. The generated FEM model of the actual surface can be compared with the contour of the CAD design drawing. The structure of the surface is clearly visible in the result. To assess the surface, statements about the surface structure on a micro level can be made (short-wave nature, paint quality). The sensitivity of the assessment can therefore be adapted to nearly all requirements.

Another special feature of the presented system is its integrated gesture control functionality. When the examiner points at the location at which a defect has been identified the system detects the exact position of the indicated point using 3D-tracking with two Kinects and records this position in the documentation system. Especially when dealing with very large components this simplifies the work processes and saves a lot of time, since examiners no longer have to leave their workplace to enter the type and location of the defect at a computer terminal. 

To document various types of defect, the system can be trained to recognize hand gestures. If the part is conforming, the examiner, for example, wipes over it from left to right, releasing it for further processing.

The scientists will present the system at CeBIT at the Fraunhofer stand in Hall 9.

For further information about deflectometry visit:

http://www.iosb.fraunhofer.de/servlet/is/4698/?highlight=deflektometrie

For further information about gesture control visit:

http://www.iosb.fraunhofer.de/servlet/is/33978/?highlight=gesten

Weitere Informationen:

http://www.iosb.fraunhofer.de/servlet/is/43780/

Dipl.-Ing. Sibylle Wirth | Fraunhofer-Institut

Further reports about: 3D-tracking Bildauswertung IOSB TopDocuMation processing structure triangulation

More articles from Trade Fair News:

nachricht New Process Technology Unlocks Boost in Laser Productivity
18.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht OLED microdisplays as high-precision optical fingerprint sensors
09.05.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>