Use of the Plasma Spectrum RMS Signal for Arc-Welding Diagnostics

Sensors

Jesus Mirapeix²  Adolfo Cobo²  Jose Fuentes³  Marta Davila³  Juan Maria Etayo¹ 

[1] ROBOTIKER-Tecnalia. Parque Tecnológico Edif. 202, 48170 Zamudio (Bizkaia), Spain; E-mail:;Photonics Engineering Group, Universidad de Cantabria, Santander E39005, Spain; E-Mails:;ITP (Industria de Turbo Propulsores S.A), Parque Tecnológico de Bizcaia Kanala Bidea, Edificio 300, 48170 Zamudio (Bizkaia), Spain; E-Mails:

关键词: plasma spectroscopy;    on-line monitoring;    arc-welding;    fiber sensor;    RMS signal;   

DOI  :  10.3390/s90705263

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland