Feasibility of portable NIR spectrometer for quality assurance in glue-laminated timber production. (15th November 2021)

• Record Type: Journal Article
• Authors: Sandak, Jakub; Niemz, Peter; Hänsel, Andreas; Mai, Juana; Sandak, Anna
• Is Part Of: Construction & building materials. Volume 308(2021)
• Publication Date: 2021-11-15
• Subjects: Near infrared spectroscopy -- Glue-laminated timber -- Glulam -- Delamination -- Quality assurance; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.125026
• Languages: English
• ISSNs: 0950-0618

Abstract

Graphical abstract: Highlights: Feasibility of a portable NIR sensor for determination of wood quality aspects was demonstrated. The best performance was obtained for prediction of moisture, density and mechanical properties. NIR was capable of classifying defects, trace raw resources and predicting delamination. Suggestions for industrial integration in glue-laminated timber production were provided. Abstract: The feasibility of a portable NIR sensor for off-line determination of diverse wood quality aspects relevant in the production of glue-laminated timber was demonstrated. The best performance was noticed for assessing wood moisture content, with a lower capacity to estimate wood density and mechanical properties. NIR spectroscopy was modestly capable of predicting surface roughness. However, the traceability of the raw resources and the automatic classification of diverse wood defects were successfully demonstrated. The developed chemometric model could predict the total delamination and detailed delamination length. Finally, recommendations regarding further system development were provided with the aim of implementation and integration of the NIR measurement into glue-laminated timber production plants.