Analysis of the influence of density on infrared thermography and of the scope of this technique in the detection of internal defects in wood
DOI:
https://doi.org/10.3989/mc.2012.62410Keywords:
infrared thermography, wood, density, detection of internal defects, decayAbstract
This paper shows the results of a laboratory phase for the determination of the 1limits of infrared thermography in detecting internal defects in wood and, furthermore, it analyses how the density of this material can influence the surface temperature displayed in a thermogram. To this end, experimental work is carried out whereby a series of work and environmental parameters are monitored (such as environmental temperature, relative humidity, distance to target), and the process is systematized by using pieces of different wood species (different densities) and by devising a set of samples for which various possible cases are analysed in terms of size and internal position of the damage. Similarly, using these samples, a study has been conducted on the effect on the thermal image produced by an increase of humidity inside the defect phenomena normally associated with wood decay.
Downloads
References
(1) Colantonio, A., Gonçalves, M., Gendron P.: Commissioning of exterior building envelopes of large buildings for air leakage and resultant moisture accumulation using infrared thermography and other diagnostic tools. Thermal solutions (2007), pp. 1-12.
(2) Balaras, C. A., Argiriou, A. A.: Infrared thermography for building diagnostics. Energy and buildings, 34 (2002), pp. 171-183.
(3) Clark, M. R., McCann, D. M., Forde, M. C.: Application of infrared thermography to the non-destructive testing of concrete and masonry bridges. NDT&E International 36 (2003), pp. 265–275. http://dx.doi.org/10.1016/S0963-8695(02)00060-9
(4) Luong, M. P.: Change of thermal images of lumber including knots, finger joints and metal connectors. Bull Kyoto Univ For 69 (1996), pp. 114-128.
(5) Tanaka, T.: Wood inspection by thermography. Wood NTD-2000 – 12th International Symposium on non-destructive testing of wood, vol. 6, nº 3 (2000).
(6) Wyckhuyse, A., Maldague, X.: A study of Wood Inspection by Infrared Thermography. Part I: Wood Pole Inspection by Infrared Thermography. Research in Nondestructive Evaluation (2001), pp. 1-12.
(7) Wyckhuyse, A., Maldague, X.: Wood Inspection by Infrared Thermography. Part II: Thermography for Wood Defects Detection. Research in Non destructive Evaluation (2001), pp. 13-21.
(8) Ludwig, N., Redaelli, V., Rosina, E., Augelli, F.: Moisture detection in wood and plaster by IR thermography. Infrared Physics & Technology vol. 46 (2004), pp. 161-166. http://dx.doi.org/10.1016/j.infrared.2004.03.020
(9) Gilberg, M., Riegel, C., Melia, B.: Leonard J. Detecting Subterranean Termite Activity with Infrared Thermography: A Case Study. APT Bulletin, vol. 34, nº 2/3 (2003), pp 47-53. http://dx.doi.org/10.2307/1504822
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2012 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the print and online versions of this journal are the property of the Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. You may read here the basic information and the legal text of the licence. The indication of the CC BY 4.0 licence must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the final version of the work produced by the publisher, is not allowed.
