Machinery & Energetics

The problems of the valuation of electromagnetic radiation are considered. This article describes the physics of the effects of microwave radiation on various materials and humans, the difference between microwave and ionizing radiation, protection from microwave radiation and the standards existing in the world when working with ultrahigh frequencies. Modern approaches to the establishment of maximum permissible levels of electromagnetic radiation and possible changes in the human body under the influence of high-frequency radiation are described, the main methods and means of protection against them are given. Characterized the most common sources of the electromagnetic field, under the influence of which there is each person. The prospects of research aimed at the unification and optimization of international and national standards for maximum permissible levels of exposure to electromagnetic radiation on humans are discussed. It was revealed that the radiation power absorbed by the material (tree) cannot be regulated it depends on the type of plant waste, its moisture content and form. It has been established that it is necessary to choose the radiation power absorbed by the protection and the radiation power of the microwave sources, taking into account that to provide background power that can affect people. We consider the method of choosing protection from the effects of several sources of electromagnetic radiation, which is currently a problem and requires the implementation of a group of measures, and the process of their implementation is quite time-consuming and is associated in some cases with significant material costs. The choice of means of protection is complicated by the need to simultaneously take into account the parameters of several components of the EMF, the electrical and magnetic properties of the screen materials, its design, geometric dimensions, etc. A mathematical model for limiting the power of a microwave installation for wood drying is presented, taking into account the maximum permissible value of the background energy.

normalization of electromagnetic radiation, drying of plant waste, microwave installation