Сontrol of Lumber Drying Process in the Microwave Cavity-Type Wood-Drying Kiln

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UDС

674.047:66.047.354

DOI:

DOI: 10.17238/issn0536-1036.2016.1.122

Abstract

Wood drying is the most important component of the technological wood processing, large-ly determines the quality of the final product. Development of lumber drying technology is of great importance. Drying lumber with the use of electromagnetic energy is of great inter-est among the currently existing methods of drying of wood. In this regard, there is a need to develop high-tech devices for drying of wood in the microwave field, working in automatic mode taking into account the energy characteristics of the cavity of a kiln. It can be done with the help of technical control systems and drying process management with the use of appropriate computer software. To create such systems it is necessary to develop a measur-ing unit, which can take into account the interdependence of the cavity energy parameters. The article describes the scientifically grounded method of solving the problem of automatic control of the process of wood drying in a microwave cavity-type wood-drying kiln. A mathematical model of a defined component part of the noncontact inspection system – the functional wood moisture meter based on the interconnection of energy parameters of the cavity of a wood-drying kiln is represented. The results of the research of wood drying process in MW electromagnetic field in a cavity-type wood-drying kiln are demonstrated. The measuring control system of drying process with the use of water content measurements resources of wood is considered.

Authors

V.I. Melekhov, Doctor of Engineering Sciences, Professor V.A. Shul'gin, Senior Lecturer

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: v.shulgin@agtu.ru

Keywords

microwave drying of wood, cavity, Q-factor of the resonance chamber, dielectric loss tangent, electromagnetic energy, specific dielectric losses, primary transducer, power delivered.

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Received on February 07, 2014