GMAW熔池三维形态视觉检测与表面流场示踪

hrough visual inspection and tracer technique, draw the tracer particles flow path, and analyze the liquid metal flow and velocity distribution in the weld pool. Use RGB 3 channels CMOS color camera and appropriate filter system to collect high-definition weld pool image; designed efficient algorithm, recover the three dimensional shape of weld pool from the two dimensional image; added heat-resistant particles to the weld pool as tracer particles, extract the tracer particle coordinates and calculate the flow speed to characterize the flow state and velocity distribution in different areas of the weld pool. The experiment results show that the image acquisition method can acquire clear image of weld pool continuously. Furthermore, the three dimensional shape of the weld pool, weld pool boundary and tracer particle coordinates can be extracted using the image processing algorithm