German shipbuilding is widely acknowledged for its large-scale specialization. Small series and unique specimens gain more and more importance, quality requirements increase, and cooperation between shipyards and suppliers becomes more and more complex. The production of large prototypical components with high accuracy regarding the given construction data is rather seldom due to technological reasons. Therefore, a target/ actual comparison continuously has to accompany the production process. Deviations result in post-processing of components, or the construction data have to be revised for future processes. Design modifications become inevitable.
The project aims at developing an augmented reality system easy to handle in order to realize design modifications in free space. With the system real components can be recorded on-site in real time, the data being displayed and processed. We develop a method to put up target/ actual comparisons between the design data and the actual components. Hierarchies are kept flat so that changes in the CAD data can be carried out directly by the workers. A tablet PC shall capture the pose of the large technical object in real time and visualize its target state as well as its actual state. In order to determine the actual state laser scan data are analyzed.
Due to frequent deviations between target and performance and different data formats the accurate 3D registration of the actual state (laser scan data) in comparison to the target state (CAD data) is a challenging task and one of the research focusses of Fraunhofer IGD. Furthermore, we deal with tracking and determining the pose of large technical objects in real time in order to realize design modifications in free space. In this course we concentrate on the fusion of different algorithms of optical tracking supported by further sensors like e. g. acceleration sensors.