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
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:
For further information about gesture control visit:
Dipl.-Ing. Sibylle Wirth | Fraunhofer-Institut
Novel coatings combine protection with colour effects
27.03.2015 | INM - Leibniz-Institut für Neue Materialien gGmbH
Surface-modified nanoparticles endow coatings with combined properties
26.03.2015 | INM - Leibniz-Institut für Neue Materialien gGmbH
In an experiment at the Department of Energy's SLAC National Accelerator Laboratory, scientists precisely measured the temperature and structure of aluminum as...
The IPH presents a solution at HANNOVER MESSE 2015 to make ship traffic more reliable while decreasing the maintenance costs at the same time. In cooperation with project partners, the research institute from Hannover, Germany, has developed a sensor system which continuously monitors the condition of the marine gearbox, thus preventing breakdowns. Special feature: the monitoring system works wirelessly and energy-autonomously. The required electrical power is generated where it is needed – directly at the sensor.
As well as cars need to be certified regularly (in Germany by the TÜV – Technical Inspection Association), ships need to be inspected – if the powertrain stops...
When an earthquake hits, the faster first responders can get to an impacted area, the more likely infrastructure--and lives--can be saved.
The Atlantic overturning is one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards. Also known as the Gulf Stream system, it is responsible for the mild climate in northwestern Europe.
Scientists now found evidence for a slowdown of the overturning – multiple lines of observation suggest that in recent decades, the current system has been...
Because they are regularly subjected to heavy vehicle traffic, emissions, moisture and salt, above- and underground parking garages, as well as bridges, frequently experience large areas of corrosion. Most inspection systems to date have only been capable of inspecting smaller surface areas.
From April 13 to April 17 at the Hannover Messe (hall 2, exhibit booth C16), engineers from the Fraunhofer Institute for Nondestructive Testing IZFP will be...
25.03.2015 | Event News
19.03.2015 | Event News
17.03.2015 | Event News
27.03.2015 | Agricultural and Forestry Science
27.03.2015 | Materials Sciences
27.03.2015 | Ecology, The Environment and Conservation