International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

During out work in a project related to European security, we have created various devices. One of them is a sensor for control of contaminations in the composition of fogs, which is first of its kind in the world. The development of such a sensor is important because in this project, artificially generated fogs with special additives are used for decontamination, and it is crucial to control the quantity of impurities in these fogs. In this work, different aspects of the operation of this sensor, its advantages and design considerations are discussed.

We present and explain the mathematical apparatus used in a numerical simulation model created with АNSYS СFX Software. The purpose of the model is to perform computations of fog parameters in different points of artificially generated fog sprays, which are then used to calibrate a novel type of fog sensors. By changing the distance between the nozzle and the measuring laser beam of the sensor, we can assess how the number flow rate and diameter distribution of fog droplets are varied within in the spray. This work is related to improving European security by introducing systems for quick counteraction to terrorist attacks, industrial accidents and natural disasters. These systems use artificial fog generation to collect and deposit on the ground harmful aerosols dispersed in air, especially CBRN agents. Our newly developed fog sensors operate on the basis of the electromagnetic echo effect to control the decontamination process. In order to optimize the work of the sensors, it is crucial to investigate fogs and their ability to absorb harmful substances from air. The most important fog parameters that influence the efficiency of the cleaning process are the number of droplets and their size.

Automated optical scanning systems for analysis of solid surfaces are presented in this work. The prototypes are capable of detecting various parameters and irregularities related to the surfaces of solid bodies by measuring the amplitude of modulated signals of the Electromagnetic Echo Effect. The systems allow various sizes of all kinds of surfaces to be scanned and the results to be visualized on a computer screen. The aim of this work is to present two prototype versions (which use analogue and digital measuring devices) and to show their capabilities. Their general purpose is to scan different areas of specimens and visualize their sensitivity to the Electromagnetic Echo
Effect onto a plot of coordinates but they are also capable of providing valuable information about structural, mechanical and electrical surface parameters.