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

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: Streamlining accelerated computing for industry

PyFR code combines high accuracy with flexibility to resolve unsteady turbulence problems

Scientists and engineers striving to create the next machine-age marvel--whether it be a more aerodynamic rocket, a faster race car, or a higher-efficiency jet...

Im Focus: X-ray optics on a chip

Waveguides are widely used for filtering, confining, guiding, coupling or splitting beams of visible light. However, creating waveguides that could do the same for X-rays has posed tremendous challenges in fabrication, so they are still only in an early stage of development.

In the latest issue of Acta Crystallographica Section A: Foundations and Advances , Sarah Hoffmann-Urlaub and Tim Salditt report the fabrication and testing of...

Im Focus: Piggyback battery for microchips: TU Graz researchers develop new battery concept

Electrochemists at TU Graz have managed to use monocrystalline semiconductor silicon as an active storage electrode in lithium batteries. This enables an integrated power supply to be made for microchips with a rechargeable battery.

Small electrical gadgets, such as mobile phones, tablets or notebooks, are indispensable accompaniments of everyday life. Integrated circuits in the interiors...

Im Focus: UCI physicists confirm possible discovery of fifth force of nature

Light particle could be key to understanding dark matter in universe

Recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fifth fundamental force of nature, according...

Im Focus: Wi-fi from lasers

White light from lasers demonstrates data speeds of up to 2 GB/s

A nanocrystalline material that rapidly makes white light out of blue light has been developed by KAUST researchers.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

The energy transition is not possible without Geotechnics

25.08.2016 | Event News

New Ideas for the Shipping Industry

24.08.2016 | Event News

A week of excellence: 22 of the world’s best computer scientists and mathematicians in Heidelberg

12.08.2016 | Event News

 
Latest News

Symmetry crucial for building key biomaterial collagen in the lab

26.08.2016 | Health and Medicine

Volcanic eruption masked acceleration in sea level rise

26.08.2016 | Earth Sciences

Moth takes advantage of defensive compounds in Physalis fruits

26.08.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>