Defect Detection in Arc-Welding Processes by Means of the Line-to-Continuum Method and Feature Selection

Sensors

P. Beatriz Garcia-Allende¹  Jesus Mirapeix²  Olga M. Conde²  Adolfo Cobo² 

[1] Photonics Engineering Group, University of Cantabria, Avda. de los Castros S/N, 39005 Santander, Spain;

关键词: arc-welding;    plasma spectroscopy;    feature selection;    on-line monitoring;   

DOI  :  10.3390/s91007753

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.