Abstract:
The modulus of rupture (MOR) which is the key to the strength of oriented strand board (OSB) depends on the fiber orientation on OSB surface. In order to improve the quality of OSB products, it is essential to optimize the flake alignments of the wood strands. In this paper, a line detection method based on small eigenvalue in conjunction with Canny edge detector was adopted to simulate the fiber strands with the ultimate aim of optimizing the fiber orientation and quality of the manufactured product. Then ellipse fitting analysis and/or line fitting analysis were used to determine the fiber orientation for all line or ellipse connectedness labeling, which expresses the fiber strands. The fiber orientation measured automatically was compared to that measured manually. It was observed that the ratio of the fiber orientation measured manually to that measured automatically was close to unity. The results indicated that the method developed in this paper when used to determine fiber orientation of the face surface in OSB was effective. However, the method developed in this paper was not effective for the under surface because small strands tend to fall when the face and middle layer were distributed, on the edge formation of fiber strands. � INRA, EDP Sciences, 2005.
Description:
Hu, C., College of Forest, South China Agricultural University, Wushan, Tianhe District, Guangzhou, Guangdong, China; Tanaka, C., Department of Environmental Science and Technology, Kagoshima University, Kagoshima, Japan; Okai, R., Department of Technology Education, University of Education, Winneba, Kumasi Campus, PO Box 1277, Kumasi, Ghana; Ohtani, T., Faculty of Science and Engineering, Shimane University, Matsue, Shimane, Japan