Monitoring of Laser Welding Process Using Its Acoustic Emission Signal
Processing and identification of signals informatively characterizing any technological process, especially the signals of acoustic and electromagnetic emission, is a complex multi-level task. Many studies are devoted to solving it. However, no comprehensive system for analyzing these signals has been represented yet. This study found out that there is a relationship between the parameters of laser welding technological process and registered acoustic emission signals, and that relationship is independent on investigation methods. The signals of acoustic and electromagnetic emission have been chosen as feedback signals of laser welding technological process, because their transmission and analysis require minimal time and computational resources. The paper describes the peculiarities of channels shielding for transmitting the technological data, in particular, the circuits of applying the shields for electromagnetic protection are given and their efficiency is shown.
KeywordsLaser welding Acoustic emission Signal registration Signal identification Quality Defect detection
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