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Evaluation of concrete cover thickness and steel bar diameter - interpretation of leakage flux locus curves with neutal networks vs. analytical methods

Messung der Stahlbewehrung in Beton - Neuronale und modellgestützte Musteranalyse
 
: Hentschel, D.; Dobmann, G.; Pridöhl, E.; Fiedler, U.

Schickert, G.; Wiggenhauser, H. ; British Institute of Nondestructive Testing; Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. -DGZfP-, Berlin; Bundesanstalt für Materialforschung und -prüfung -BAM-, Berlin:
Non-Destructive Testing in Civil Engineering 1995. Vol.2
Berlin, 1995 (DGZfP-Berichtsbände 48.2)
S.729-735
International Symposium on Non-Destructive Testing in Civil Engineering <1995, Berlin>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
artificial intelligence; Beton; Betonüberdeckung; concrete; Künstliche Intelligenz; Magnetfeldsensor; magnetic field sensor; magnetic inspection; magnetisches Prüfverfahren; neural data analysis; neuronales Netzwerk

Abstract
In civil engineering, the need for reliable ndt-techniques exists to measure the concrete cover thickness above the reinforcing steel bars. The technique to achieve this developed at the IZFP Saarbrücken, in contrast to the other magnetic techniques, measures and evaluates the amplitude-locus curve of the magentic field with the help of a magneitc field sensor. This sensor scans the surface between the two pole shoes of a permanent magnet yoke. The presentation discusses two ways of interpretation of the leakage flux locus curve, resulting from this device: the analytical way and neural data analysis.

: http://publica.fraunhofer.de/dokumente/PX-13248.html