Detektion von Fehlverklebungen in Holzbauteilen mittels Mikrofokus Röntgen-Computertomographie

Title
Detektion von Fehlverklebungen in Holzbauteilen mittels Mikrofokus Röntgen-Computertomographie

Author
Sergio J. Sanabria , Peter Wyss , Juerg Neuenschwander , Peter Niemz , Urs Sennhauser

European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 605-617

Abstract

Glued timber products have an extensive range of applications in construction. In this work a Microfocus X-ray Computed Tomography method was developed to inspect gluing defects in timber samples and was applied successfully on experimental data. The bonding plane was segmented into glued and non-glued regions and imaged with 5 mm resolution. Moreover, the gap topology between timber lamellas was precisely characterised. A limited-angle reconstruction with anisotropic frame binning together with a specific glue line readout method efficiently filters out undesired wood structure highlighting the information of the adhesive joint. This method imposes limitations on the size of the specimen in only one dimension. The presence and absence of glue could be detected for glue line thicknesses over 50 μm and air gaps larger than 150 μm could be characterised. Several information reduction approaches were combined in the reconstruction process to implement the assessment of a 100×100 mm2 bonding plane in less than 40 s.

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