论文信息 - Knots detection in wood using microwaves

Knots detection in wood using microwaves

This work describes a microwave technique used to generate and process data on knots in wood prior to processing. The experimental design was a simple system composed of a microwave emitter and receiver used to scan the wood samples with knots. Signals were calibrated and amplified, and then a data storage and graphic visualization were performed. A PCL-711 data acquisition card was used in conjunction with data acquisition software. The preliminary results obtained for the studied wood samples were viewed in 2- and 3-dimensional graphics, showing a strong relation with the visual inspection of the samples.

J. Correa | E. Baradit | R. Aedo

[1] M. I. Dinator,et al. The use of linear attenuation coefficients of Gamma radiation for detecting knots in Pinus radiata , 1999 .

[2] David Salinas. BÚSQUEDA DEL CILINDRO NUDOSO EN TROZAS DE PINUS RADIATA D. DON UTILIZANDO IMÁGENES DE CT Y PATRONES DE NUDOS , 2004 .

[3] Grigoriy I. Torgovnikov,et al. Dielectric Properties of Wood and Wood-Based Materials , 1993, Springer Series in Wood Science.

[4] G. Roussy,et al. Evaluation of wood characteristics: Internal scanning of the material by microwaves , 1987, Wood Science and Technology.

[5] P. O. G. Hagman. Automatic quality sorting of Picea abies logs with a gamma ray log scanner , 1993 .

[6] Yury Shramkov,et al. Measuring the dielectric properties of wood at microwave frequencies , 2005, Wood Science and Technology.

[7] E. Baradit,et al. DETECCIÓN DE NUDOS EN MADERA CON TÉCNICAS DE MICROONDAS , 2003 .

[8] Jan Johansson,et al. Property predictions of wood using microwaves , 2001 .

[9] Lars B. Bååth,et al. Microwave polarimetry based wood scanning , 2000 .

[10] Anders Kaestner. Non-Invasive Multidimensional Imaging Applied on Biological Substances , 2002 .

[11] A. Wyckhuyse. Wood inspection by infrared thermography 1 , 2002 .

[12] P. H. Steele,et al. Locating knots in wood with an infrared detector system , 1998 .

[13] L. Gaete,et al. Ultrasonic Detection of Knots and Annual Ring Orientation in Pinus Radiata Lumber , 2000 .