Use of the plasma spectrum RMS signal for arc-welding diagnostics
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Mirapeix Serrano, Jesús María


Date
2009-07-03Derechos
Atribución 3.0 España
Publicado en
Sensors, 2009, 9(7), 5263-5276
Publisher
MDPI
Palabras clave
Plasma spectroscopy
On-line monitoring
Arc-welding
Fiber sensor
RMS signal
Abstract:
A new spectroscopic parameter is used in this paper for on-line arc-welding
quality monitoring. Plasma spectroscopy applied to welding diagnostics has typically relied
on the estimation of the plasma electronic temperature, as there is a known correlation
between this parameter and the quality of the seams. However, the practical use of this
parameter gives rise to some uncertainties that could provoke ambiguous results. For an
efficient on-line welding monitoring system, it is essential to prevent the appearance of
false alarms, as well as to detect all the possible defects. In this regard, we propose the use
of the root mean square signal of the welding plasma spectra, as this parameter will be
proven to exhibit a good correlation with the quality of the resulting seams. Results
corresponding to several arc-welding field tests performed on Inconel and titanium
specimens will be discussed and compared to non-destructive evaluation techniques.
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