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.

A method was developed for contactless evaluation of the number and diameter of droplets in a jet, by means of gravitational separation and measurement of an electrical signal from a laser-induced electromagnetic echo effect (EMEE), at several points of the jet. With it, only with modulated laser radiation, an electrical signal is induced. The measured value of the signal from this EMEE depends on the parameters of the fog (number and sizes of droplets). This signal is measured at several points of the jet, as the droplets must be in laminar flow. After measuring the signal at the first point, the signals at the previous points are subtracted from its value at each subsequent point, in order to separate the measured signal at each point and determine the change in fog parameters. The method represents an affordable and reliable alternative to existing fog characterization techniques.