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Hamamatsu Corp. - Earth Innovations LB 2/24

Plasma Spectroscopy Monitors Welds

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Scott M. Aldis-Wilson

Researchers from Università degli Studie Politecnico di Bari and from Istituto Nazionale per la Fisica della Materia, both in Bari, Italy, have developed a nonintrusive sensor system to monitor laser welding in real time. By spectroscopically examining the welding plasma, the system identifies more- and less-energetic regions near the laser-material interaction zone. Results of experiments with the sensor suggest that a lower standard deviation of the plasma temperature signal correlates with higher weld quality, enabling the researchers to predict the size of defects based on the welding...Read full article

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    Published: March 2002
    industrialResearch & TechnologySensors & DetectorsspectroscopyTech Pulse

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