Utilizing wave polarization in microwave characterization of heterogeneous anisotropic materials with application to the wood industry

Publications

Share / Export Citation / Email / Print / Text size:

International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

GET ALERTS

eISSN: 1178-5608

DESCRIPTION

12
Reader(s)
26
Visit(s)
0
Comment(s)
0
Share(s)

VOLUME 7 , ISSUE 5 (December 2014) > List of articles

Special issue ICST 2014

Utilizing wave polarization in microwave characterization of heterogeneous anisotropic materials with application to the wood industry

Mirjana Bogosanović / Grant Emms

Keywords : Non-destructive testing, free-space microwave transmission measurement, polarization, heterogeneous media, wood, moisture content, density

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 7, Issue 5, Pages 1-6, DOI: https://doi.org/10.21307/ijssis-2019-040

License : (CC BY-NC-ND 4.0)

Published Online: 15-February-2020

ARTICLE

ABSTRACT

This paper presents a novel approach to microwave non-contact, non-destructive testing of wood, investigating additional indicators of wood structure, in particular the significance of wave polarization in transmission measurements. Contribution of wave polarization to wood characterization is studied, considering detection of rapid and gradual variations in wood structure, determination of moisture content and density distribution along the sample, as well as bulk properties detection. A set of microwave sensors in a collinear arrangement was used in two orthogonal linear polarizations. Significant findings are reported, in particular polarization dependence of moisture related attenuation, as well as improved defect detection accuracy when measurements in two orthogonal linear polarizations are considered. In addition, sorting wood samples into categories is considered and the advantages of this approach are presented.

Content not available PDF Share

FIGURES & TABLES

REFERENCES

[1] M. Bogosanovic, A. Al-Anbuky and G.W. Emms, “Overview and comparison of microwave noncontact wood measurement techniques”, Journal of Wood Science, SpringerLink, Japan vol.56(5), pp. 357 – 365. 5 November 2010.

[2] S. Heikkila, P. Jakkula and M. Tiuri, “Microwave methods for strenght of timber and for automatic edging of boards”, Proc. 12th European Microwave Conference, Helsinki, Finland,  pp. 599-603, 1982.

[3] R.J. King and Y.H. Yen, “Probing Amplitude, Phase and Polarization of Microwave Field Distributions in Real Time”, IEEE Transaction on Microw. Theory and Techn., vol.MTT-29(11), p1225, Nov. 1981.

[4] M. Tiuri, K. Jokela and S. Heikkila, “Microwave instrument for accurate moisture and density measurement of timber”, J Microwave Power 15, pp. 251–254. 1980.

[5] M. Bogosanovic, A. Al-Anbuky and G.W. Emms, “Microwave Nondestructive Testing of Wood Anisotropy and Scatter”, IEEE Sensors Journal,  Vol. 13(1), pp.306-313, Jan.2013.

[6] R.H. Leicester and C.A. Seath, “Application of microwave scanners for stress grading”,  4th International Wood Engineering Conference, New Orleans, USA, Vol. 2, pp. 435–440. 1996.

[7] N. Lundgren, O. Hagman and J. Johansson, “Predicting moisture content and density distribution of Scots pine by microwave scanning of sawn timber II: evaluation of models generated on a pixel level”, Journal of Wood Science, Springer, Japan, Vol. 52(1), pp.39–43.,  2006.

[8] D.K. Ghodgaonkar, V.V. Varadan and V.K. Varadan, “A Free-space Method for Measurement of Dielectric Constants and Loss Tangents at Microwave Frequencies”,  IEEE Trans on Instrum and Meas, vol.37(3), pp. 789 – 793. June 1989.

[9] G. F. Engen and C.A. Hoer, “Thru-Reflect-Line: An Improved Technique for Calibrating the Dual Six-Port Automatic Network Analyzer” IEEE Trans on Microw Theory and Techn, vol. MTT-27, pp. 987-993. Dec. 1979.

EXTRA FILES

COMMENTS