Abstract: Plasma optical spectroscopy is widely employed in on-line welding diagnostics. The determination of the plasma electron temperature, which is typically selected as the output monitoring parameter, implies the identification of the atomic emission lines. As a consequence, additional processing stages are required with a direct impact on the real time performance of the technique. The line-to-continuum method is a feasible alternative spectroscopic approach and it is particularly interesting in terms of its computational efficiency. However, the monitoring signal highly depends on the chosen emission line. In this paper, a feature selection methodology is proposed to solve the uncertainty regarding the selection of the optimum spectral band, which allows the employment of the line-to-continuum method for on-line welding diagnostics. Field test results have been conducted to demonstrate the feasibility of the solution.
Keywords: arc-welding; plasma spectroscopy; feature selection; on-line monitoring
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Garcia-Allende, P.B.; Mirapeix, J.; Conde, O.M.; Cobo, A.; Lopez-Higuera, J.M. Defect Detection in Arc-Welding Processes by Means of the Line-to-Continuum Method and Feature Selection. Sensors 2009, 9, 7753-7770.
Garcia-Allende PB, Mirapeix J, Conde OM, Cobo A, Lopez-Higuera JM. Defect Detection in Arc-Welding Processes by Means of the Line-to-Continuum Method and Feature Selection. Sensors. 2009; 9(10):7753-7770.
Garcia-Allende, P. Beatriz; Mirapeix, Jesus; Conde, Olga M.; Cobo, Adolfo; Lopez-Higuera, Jose M. 2009. "Defect Detection in Arc-Welding Processes by Means of the Line-to-Continuum Method and Feature Selection." Sensors 9, no. 10: 7753-7770.