TY - CONF A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Steinfurth, Henrik A1 - Krankenhagen, Rainer A1 - Mecke, R. A1 - Schiller, M. A1 - Kernchen, A. A1 - Kalisch, U. A1 - Hennen, C. A1 - Meinhardt, J. A1 - Groll, E.T. A1 - Arnold, T. T1 - Detection and characterisation of safety relevant detachments of facade elements using a combination of active thermography and optical scanning methods T2 - NDT-CE 2015 - International symposium non-destructive testing in civil engineering (Proceedings) N2 - In this contribution, the development and application of optical and thermographic methods for the nondestructive evaluation of delaminations, cracks and further substructures in Connection with bulging is presented. Since delaminated fagade elements show geometric as well as thermal anomalies, surface geometry and defects beneath the surface were investigated. As methods, Stereo photogrammetry, a tracking based method for tactile recording of geometric 3D data and active thermography were used. Two case studies were assessed with a combination of these methods: the plaster scratches at the Magdeburg Cathedral and a mural painting in Cobbelsdorf, both located in Germany. While the plaster scratches have been investigated by artificial heating with an infrared radiator, the rural painting was tested by analysing the temperature increase due to solar heating. T2 - NDT-CE 2015 - International symposium non-destructive testing in civil engineering CY - Berlin, Germany DA - 15.09.2015 KW - Active thermography KW - Stereo photogrammetry KW - Tracking sensor KW - Historic plaster KW - Masonry KW - Delaminations KW - Cracks PY - 2015 SN - 1435-4934 SP - 291 EP - 300 AN - OPUS4-35106 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -