Development of a weld quality monitoring system in CO2 laser welding by using photodiodes

Hyunsung Park, Sehun Rhee

Research output: Contribution to journalArticle

4 Scopus citations


Defects produced on a laser weld production line were monitored in real time to reduce the loss of material and guarantee good quality. The monitoring system consisted of three photodiodes that measures the intensity of plasma and spatter of the emitted light produced during the welding process. An algorithm was developed to determine the weld quality using a fuzzy pattern recognition technique. The weld quality changes due to laser heat input and focus misalignment were thus detected.

Original languageEnglish
Pages (from-to)12-18
Number of pages7
JournalJournal of Laser Applications
Issue number1
StatePublished - 2001 Jan 1

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