Limitations of a 3-D Image Analysis-Based Particle Size Measuring System for Wood Particle Dimension Measurement
Keywords:3D particle size measurement, image analysis, particleboard manufacturing
Against the background of inaccurately measured wood particle dimensions, applying the three-dimensional (3-D) image analysis–based particle size characterization system Partimac 3D XL in pre- liminary tests, metal platelets with various aspect ratios of the three main axes are employed to understand and explain the observed limitations of the measuring principle. It was found that particle width and thickness interact increasingly with a decreasing aspect ratio and, thus, the digital replica and subsequent determination of the dimensions become incorrect. This was ascribed to the random orientation of the particles during image acquisition, which cannot be overcome with a ﬁnite number of cameras in the system.
"Aßmann J (2015) Kostendruck macht erﬁnderisch: Innova- tionen fur die Holzwerkstofﬁndustrie [Cost pressure is the mother of invention: Innovations for the wood-based panel industry]. Pages 26-34 in Anonymous, eds, Proc. 11th Holzwerkstoffkolloquium, 10-12 December 2015, Dres- den, Germany. Institut fur Holztechnologie Dresden gemeinnutzige GmbH (IHD), Dresden, Germany (In German).
BASF SE, Schafer M, Ettmuller J, Ziegler S, Reindel K (2007) Device and method for automatically determining the individual three-dimensional shape of particles. World Intellectual Property Organization (WIPO), Publication number WO/2007/060127.
Dunky M, Niemz P (2002) Holzwerkstoffe und leime— Technologie und einﬂussfaktoren [Wood-based panels and adhesives—Technology and inﬂuencing factors]. Springer- Verlag, Berlin/Heidelberg. 954 pp (In German).
Plinke B (1987) Rechnergestutzte partikelmessung an materialien der holzwerkstofﬁndustrie [Computer-aided particle size measurement on materials of the wood- based panel industry]. Holz Roh Werkst 54:315-318 (In German with summary in English).
Sun Y, Indraratna B, Nimbalkar S (2014) Three-dimensional characterisation of particle size and shape for ballast. Geotech. Lett. 4(3):197-202.
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