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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
A Portable Microwave
System for Woodworm Disinfestation of Aritistic Painted Boards [PDF] |
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AUTHORS |
M. Bini, D. Andreuccetti, A. Ignesti, R. Olmi,
S. Priori and R. Vanni 1997 32 3 180-187 |
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Abstract Microwave power can be effectively used for disinfesting wooden objects of wood worms. Disinfestation is achieved by heating woodworms inside wood above their lethal temperature values. A prototype of a portable
microwave system suitable for treating small and delicate wooden objects is
described. The system, working at 2.45 GHz, used a commercial magnetron, a
radiative applicator, and a non-contacting thermometer to monitor the
temperature of the painted surface. A flow of air is blown through the
applicator to cool the irradiated surface. A treatment bench has been set up
to heat painted boards in controlled conditions. The applicator is placed on
the rear side of the board, while the painted side is monitored by means of
an infrared thermometer to maintain its temperature below safe levels (e.g.
50- Results concerning the effect of microwave heating on several specimens infested by woodworms in all metamorphical stages (egg, pupa and larva) are reported and discussed. Preliminary results about possible detrimental effects induced by heating on wooden boards and on painted surfaces are also reported. An experimental procedure for determining the SAR distribution produced by the applicator of the disinfestation system on a wooden board is described. The procedure is based on a thermographic analysis of the heated object. An analysis of the SAR uncertainty due to thermal diffusion and to surface radiation and convection losses is carried out, showing advantages and limitations of the thermographic method. Key Words: Wood disinfestation, microwave treatments, microwave heating |
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