Creation of a Mock-up Laser Welding Monitoring System Based on a Photomultiplier Tube

Artemii Bernatskyi, Mykola Sokolovskyi, Taras Nabok, Oleksandr Siora, Volodymyr Lukashenko, Valentyna Bondarieva, Volodymyr Kurylo, Oleksandr Suchek, Natalia Shamsutdinova, Iryna Siora

Abstract


Laser welding is widely used in the different branches of mechanical engineering, mainly consisting of the interaction between the laser beam and the welding material. Online monitoring and quality testing of laser welding processes are important for the manufacturing of quality products. Analysis of scientific papers on this topic showed that there is a relationship between the technological process of laser welding and the recorded signals. The purpose of this work is the creation of a mock-up laser welding processes monitoring system based on a photo sensor. During the design process, a photovoltaic tube was chosen to use with the vacuum photocell. A complete mock-up laser welding monitoring system was developed and tested. The photocell is used with the optical filters, which allows us to record the deviation of the intensity of the torch during the process of laser welding. According to the results of measurement of the intensity of the light emission of the torch of the welding melt bath, the photocell forms a signal. When the photocell is loaded with a strong enough active resistance, it will record a voltage drop sufficient to be recorded by an oscilloscope. Electron-optical version of the layout of the mock-up laser welding monitoring system, based on the analysis of signals taken from photosensors showed good results with potential to implement additional monitoring systems to allow measuring more characteristics of the laser beam.


Keywords


laser welding; monitoring; photomultiplier tube; optical radiation; analogue signal

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References


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DOI: http://dx.doi.org/10.52155/ijpsat.v30.1.3873

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Copyright (c) 2021 Artemii Bernatskyi, Mykola Sokolovskyi, Taras Nabok, Oleksandr Siora, Volodymyr Lukashenko, Valentyna Bondarieva, Volodymyr Kurylo, Oleksandr Suchek, Natalia Shamsutdinova, Iryna Siora

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