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Sensors 2010, 10(4), 3549-3561; doi:10.3390/s100403549
Article

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

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Received: 13 January 2010; in revised form: 27 January 2010 / Accepted: 12 March 2010 / Published: 8 April 2010
(This article belongs to the Section Physical Sensors)
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Abstract: The plasma optical radiation emitted during CO2 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.
Keywords: optical sensor; laser welding; plasma spectroscopy optical sensor; laser welding; plasma spectroscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Sibillano, T.; Ancona, A.; Rizzi, D.; Lupo, V.; Tricarico, L.; Lugarà, P.M. Plasma Plume Oscillations Monitoring during Laser Welding of Stainless Steel by Discrete Wavelet Transform Application. Sensors 2010, 10, 3549-3561.

AMA Style

Sibillano T, Ancona A, Rizzi D, Lupo V, Tricarico L, Lugarà PM. Plasma Plume Oscillations Monitoring during Laser Welding of Stainless Steel by Discrete Wavelet Transform Application. Sensors. 2010; 10(4):3549-3561.

Chicago/Turabian Style

Sibillano, Teresa; Ancona, Antonio; Rizzi, Domenico; Lupo, Valentina; Tricarico, Luigi; Lugarà, Pietro Mario. 2010. "Plasma Plume Oscillations Monitoring during Laser Welding of Stainless Steel by Discrete Wavelet Transform Application." Sensors 10, no. 4: 3549-3561.


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