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Author: Deyan Gradinarov

  • TECHNOLOGIES

    Trends of online google searches related to welding process

    • Deyan Gradinarov
    Machines. Technologies. Materials., Vol. 16 (2022), Issue 3, pg(s) 100-101
    • Abstract
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    In this paper is reviewed google search as a helpful free instrument for statistics when preparing the state of art. It is applied to welding processes.

  • MATHEMATICAL MODELLING OF TECHNOLOGICAL PROCESSES AND SYSTEMS

    Validation MAGMA model of welding process

    • Deyan Gradinarov
    • Georgi Georgiev
    Mathematical Modeling, Vol. 5 (2021), Issue 3, pg(s) 99-100
    • Abstract
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    It is presented comparison between captured and simulated temperatures in specific points of welding process and simulation model made with MAGMA software.

  • Set up for real time capturing of welding parameters

    • Deyan Gradinarov
    Materials Science. Non-Equilibrium Phase Transformations., Vol. 7 (2021), Issue 3, pg(s) 110-111
    • Abstract
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    It is presented set up for real time capturing welding parameters – voltage, current and temperature in specific points of welding process.

  • SCIENCE

    Points for real time temperature capturing in welding process

    • Deyan Gradinarov
    Science. Business. Society., Vol. 6 (2021), Issue 2, pg(s) 45-46
    • Abstract
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    It is presented experiment for temperature measurement in welding process. It is shown arc interference with measurements and temperature versus distance form arc trajectory. This study will help selecting specific points for measuring temperature in welding process..

  • DOMINANT TECHNOLOGIES IN “INDUSTRY 4.0”

    Real time capturing welding parameters with tracking module

    • Deyan Gradinarov
    • Yuri Bijev
    Industry 4.0, Vol. 6 (2021), Issue 6, pg(s) 229-231
    • Abstract
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    It is presented real time capturing voltage and current in welding process with module Lincoln Arc Tracker

  • DOMINANT TECHNOLOGIES IN “INDUSTRY 4.0”

    Real time capturing temperature of welding process

    • Deyan Gradinarov
    Industry 4.0, Vol. 6 (2021), Issue 5, pg(s) 192-193
    • Abstract
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    It is presented real time capturing temperature in specific points of welding process with pyrometer

  • INNOVATIVE SOLUTIONS

    Study on HD cameras with CMOS sensor degradation upon ionizing radiation exposition

    • Deyan Gradinarov
    • Yuri Bijev
    • Iliyan Atanasov
    • Stoil Todorov
    Innovations, Vol. 9 (2021), Issue 3, pg(s) 126-128
    • Abstract
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    In this paper we have exposed 3 HD cameras with CMOS sensor in long time experiment at different doses and exposition time with γ radiation from 2 sources of ionizing radiation – cobalt 60 (Co60) and cesium 137 (Cs137) at room temperature imitating the working conditions of “hot cell” premises. All components of the used camera are without radiation reinforcement, excluding the lenses. During the experiment, we found degradation of the irradiated cameras. As the absorbed dose increases, the image becomes brighter. Furthermore, experimental results demonstrated decreasing in signal-noise ratio (SNR) with increasing the absorbed dose. We confirmed that the HD
    industrial cameras can operate in ionizing radiation environment with moderate decrease of

  • MATHEMATICAL MODELLING OF TECHNOLOGICAL PROCESSES AND SYSTEMS

    Modelling of wire extrusion process

    • Deyan Gradinarov
    • Nuray Hasan
    Mathematical Modeling, Vol. 4 (2020), Issue 3, pg(s) 91-92
    • Abstract
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    It is created computer model of wire extrusion process with Matlab. The model is verified by comparing the simulated results with experimental.

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