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2D- and 3D-visualisation of NDT-data using data fusion technique

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Abstract

Non-destructive testing (NDT) of concrete structures plays an increasing role in civil engineering. At present there are several acoustic and electromagnetic methods, which cover a large area of application and which can be used complementarily. But in most cases, only one method is applied to solve a distinct problem. In this contribution, results will be presented based on the networked research project FOR384, funded by the Deutsche Forschungsgemeinschaft (DFG). Among others, the combiantion of NDT methods, and thus the application of data fusion techniques, has been investigated to demonstrate synergetic effects by merging complementary results and amplifying information about concrete structures. In order to be able to combine NDT-data from several methods recorded from the same volume, the different data sets must, be adapted. After the data sets are reconstructed and transferred into a common reference system, they can be processed in different ways according to the purpose of the investigation. The results, which have been achieved in concrete tets specimens and on the carriageway of a bridge with radar, ultrasonic echo and impact echo, will be presented and will show the feasibility of the data fusion method.

Résumé

Les contrôles non destructifs (CND) sur des constructions en béton jouent un rôle de plus en plus grand en génie civil. Il existe à présent plusieurs méthodes, acoustiques et électromagnétiques dont le domaine d'application es, large et qui peuvent être complémentaires les unes des autres. Mais dans la plupart des cas, seule une méthode est appliquée pour résoudre un problème spécifique. Dans cet article seront présentés les résults, basés sur un projet de recherche en réseau, FOR384, financé par la Deutsche, Forschungsgemeinschaft (DFG). On a notamment étudié la combinaison de méthodes de contrôles non destructifs, et donc l'application de techniques de fusion de données, dans le but de démontrer les effets synergétiques en fusionnant les résultats complémentaires et en amplifiant l'information sur les constructions en béton. Afin, de pouvoir combiner les données des CND provenant de plusieurs méthodes, enregistrées à partir du même volume, différentes séries de données doivent être adaptées. Après avoir été reconstruites et transférées dans un système commun de références, les séries de données peuvent être traitées de différentes façons selon l'objectif de la recherche. Les résultats obtenus à partir d'échantillons, de béton et sur la chaussée d'un pont au moyen des techniques de radar, d'écho ultrasonique et d'écho d'impact seront présentés afin de démontrer la faisabilité de la méthode de fusion des données.

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Authors and Affiliations

  1. Federal Institute for Materials Research and Testing (BAM), Germany

    C. Kohl, M. Krause, C. Maierhofer & J. Wöstmann

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  1. C. Kohl
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  2. M. Krause
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  3. C. Maierhofer
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  4. J. Wöstmann
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Editorial note BAM (Germany) is a RILEM Titular Member. Dr. Martin Krause and Dr. Christiane Maierhofer participate in RILEM TC INR ‘Interpretation of NDT results and assessment of RC structures’.

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Kohl, C., Krause, M., Maierhofer, C. et al. 2D- and 3D-visualisation of NDT-data using data fusion technique. Mat. Struct. 38, 817–826 (2005). https://doi.org/10.1007/BF02481654

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