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 International companies showcase their innovations at Medical Manufacturing Asia in Singapore
21.06.2016 | IVAM Fachverband für Mikrotechnik

nachricht EELICON – Smart shading system
07.06.2016 | Fraunhofer-Institut für Silicatforschung ISC

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: First experimental quantum simulation of particle physics phenomena

Physicists in Innsbruck have realized the first quantum simulation of lattice gauge theories, building a bridge between high-energy theory and atomic physics. In the journal Nature, Rainer Blatt‘s and Peter Zoller’s research teams describe how they simulated the creation of elementary particle pairs out of the vacuum by using a quantum computer.

Elementary particles are the fundamental buildings blocks of matter, and their properties are described by the Standard Model of particle physics. The...

Im Focus: Is There Life On Mars?

Survivalist back from Space - 18 months on the outer skin of the ISS

A year and a half on the outer wall of the International Space Station ISS in altitude of 400 kilometers is a real challenge. Whether a primordial bacterium...

Im Focus: CWRU physicists deploy magnetic vortex to control electron spin

Potential technology for quantum computing, keener sensors

Researchers at Case Western Reserve University have developed a way to swiftly and precisely control electron spins at room temperature.

Im Focus: Physicists measured something new in the radioactive decay of neutrons

The experiment inspired theorists; future ones could reveal new physics

A physics experiment performed at the National Institute of Standards and Technology (NIST) has enhanced scientists' understanding of how free neutrons decay...

Im Focus: Discovery of gold nanocluster 'double' hints at other shape changing particles

New analysis approach brings two unique atomic structures into focus

Chemically the same, graphite and diamonds are as physically distinct as two minerals can be, one opaque and soft, the other translucent and hard. What makes...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ERES 2016: The largest conference in the European real estate industry

09.06.2016 | Event News

Networking 4.0: International Laser Technology Congress AKL’16 Shows New Ways of Cooperations

24.05.2016 | Event News

Challenges of rural labor markets

20.05.2016 | Event News

 
Latest News

Nanoscientists develop the 'ultimate discovery tool'

24.06.2016 | Materials Sciences

Russian physicists create a high-precision 'quantum ruler'

24.06.2016 | Physics and Astronomy

Hubble confirms new dark spot on Neptune

24.06.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>