中文摘要：

根据铝合金的特点，提出了铝合金钨极氩弧焊中应用的双窗口被动视觉传感技术，可以清晰地观察到熔池宽度和焊缝间隙等几何参数．通过图像处理技术可以稳定地提取出图像的几何特征，将其作为焊接质量和焊缝跟踪等技术的检测信息，并应用于火箭贮箱的焊接．

英文摘要：

This paper developed a passive visual sensing technology with double-windows inspection, which was applied in gas tungsten arc welding （GTAW） for aluminum alloy. The profile of pool and seam gap was measured clearly. These data were applied in the weld quality control and seam tracking, and the sen- sor was used in component welding in the rocket.