Synchronous acquisition and analysis of metal transfer images and electrical parameters in CO₂ arc welding

By using high speed camera and multi-channel sensing and data acquisition system,a LabVIEW-based system was developed to acquire metal transfer images and electrical parameters in short circuiting CO₂ arc welding. The difference in startup delay time between data acquisition system and high speed camera was calibrated by experiment,and the offset by software method to realize synchronous acquisition. The system was used to analyze the electrical parameters and metal transfer images. Metal transfer under different welding conditions was investigated and the correlation between electrical parameters,metal transfer image and the stability of short-circuiting transfer process was analyzed with the developed system.