Plasma Plume Oscillations Monitoring during Laser Welding of Stainless Steel by Discrete Wavelet Transform Application

The plasma optical radiation emitted during CO(2) laser welding of stainless steel samples has been detected with a Si-PIN photodiode and analyzed under different process conditions. The discrete wavelet transform (DWT) has been used to decompose the optical signal into various discrete series of se...

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Detalles Bibliográficos
Autores principales: Sibillano, Teresa, Ancona, Antonio, Rizzi, Domenico, Lupo, Valentina, Tricarico, Luigi, Lugarà, Pietro Mario
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3274232/
https://www.ncbi.nlm.nih.gov/pubmed/22319311
http://dx.doi.org/10.3390/s100403549
Descripción
Sumario:The plasma optical radiation emitted during CO(2) laser welding of stainless steel samples has been detected with a Si-PIN photodiode and analyzed under different process conditions. The discrete wavelet transform (DWT) has been used to decompose the optical signal into various discrete series of sequences over different frequency bands. The results show that changes of the process settings may yield different signal features in the range of frequencies between 200 Hz and 30 kHz. Potential applications of this method to monitor in real time the laser welding processes are also discussed.

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