Actuality of theme
Currently, the use of welded joints can be found in almost all industries. This is a very economical way of joining, which can be used to weld parts of different thicknesses. Welds are actively used in critical structures, which are often subjected to dynamic, intense and alternating loads. As a result, cracks often form in such joints, which can quickly lead to destruction, which can be accompanied by significant material damage and injury to one or more people. There is a lot of news now when the hydraulic cylinder, for example, cranes, is collapsing and negative consequences appear. Over the past few decades, the situation with the destruction of hydraulic cylinders has not changed and the percentage of such unpleasant cases does not decrease, so it is necessary to periodically monitor. The purpose of such control is the early detection of the location of the defect and its parameters, so that the responsible controller could quickly analyze the result and enter the necessary information in the control passport. In order to make the control results more reliable, it is necessary to constantly improve the methods of detecting information signals, especially for control at low signal-to-noise ratio, when noise has a strong effect on the control result, resulting in inaccurate information.

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Actuality of theme
At present, the electric field of the atmosphere is a characteristic that is poorly understood. And in vain as this feature can be very useful. At present, there are works that describe that the electric field of the atmosphere can serve as an informative parameter in finding minerals. The main characteristic of the electric field is its intensity. At the moment, the process of measuring the electric field strength of the atmosphere is quite a complex process, as in this case this parameter has very small values that are difficult to fix. And currently there is no automated system for measuring the electric field strength of the atmosphere in the field, for the study of minerals, and in general the influence of various factors on the voltage. That is why the issue of creating an automated system for measuring the electric field strength of the atmosphere in the field, as well as improving existing methods of such measurement is very important.

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The purpose of the master's dissertation is to develop a thermal imaging system and application for smartphones, which can be used not only in the audit of heat consumption of buildings, but also practically used in various fields.
The content of the master's dissertation contains an introduction, four sections, conclusions, a list of sources used in the study and appendices. The work is presented on 73 pages, contains 28 figures and 28 tables.
Within the framework of this master's dissertation the research of theoretical bases of thermography was carried out, the functional scheme of the device was developed, the thermal imaging system was constructed and the mobile application for convenient control of the device was developed, ordinary users in everyday life.

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The master's dissertation consists of four sections, 84 pages, 25 figures, 28 tables. In the process of writing, 11 literary sources were processed.

In the first section of the dissertation, an analytical review was conducted, in which the object of control was considered, the methods of non-destructive testing were analyzed, and their advantages and disadvantages were considered. The second section includes the calculation of a combined piezoelectric transducer. Also in this section calculations of acoustic and electroacoustic paths were carried out. The structural scheme of the device is developed, and on its basis functional. All nodes of the scheme are calculated and coordinated. In the third section, calculations and simulations of an automated "manual" manipulator in the SolidWorks environment were performed. The fourth section is devoted to the development of a startup project: market analysis, search for competitors, etc. Based on the calculations, the electrical circuit diagram was designed and developed.

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The master's dissertation consists of six chapters, 90 pages, 22 illustrations, 30 tables, 25 sources of literature have been studied.

In the first section, an analytical review was conducted, in which the object of control was considered. The analysis of smoke detection methods is carried out. In the second section, the optical system of our smoke chamber was calculated. A lens for external fire alarm has been designed and modeled. In the third section the electric scheme was developed, all important accessories which are necessary for stable work of the device are selected. In the fourth section the complete design of our device is constructed. The fifth section describes the software that fully satisfies us and meets our requirements for an automated system. The sixth chapter outlines the main advantages of our project over competitors. Advantages of using fire protection systems rather than single devices is a complete connection that will signal to devices that do not detect smoke command to notify the fire, in one installation. That is, if the owner of the house does not hear a signal from the sensor which detects smoke, he will hear it from a device that is nearby.

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  1. Baranovskyi D. Computerized eddy current testing system using matrix-type converters
  2. Noshchenko S. Automated eddy current flaw detector for monitoring the condition of structural elements of aircraft
  3. Romaniuk T. Computerized system of multiparameter eddy current control of mechanical engineering products
  4. Lahutin Y. Computer system for titanium testing

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АСНК КПІ ім. Ігоря Сікорського, 2021