Abstract: Aiming at the problem of process measurement and control of the mobile repair welding robot in the blade pit of the Three Gorges turbine, an embedded visual feedback control system based on dual digital signal processors was developed. Adopting the modular design concept of functional units and the stacked building block assembly structure, the system integrates the image acquisition and processing based on TMS320DM 642, the motion control and parameter adjustment based on TMS320L F2812, the digital video input, analog video input, analog video output, digital video output, power conversion and other functional modules in a space size of 170mm×57mm×40mm. The system can be installed on the mobile repair robot and work independently without the industrial computer. It is suitable for process monitoring, weld tracking and real-time control of weld formation of various welding processes such as MIG, TIG, CO2, etc. Keywords: mobile repair welding robot; dual digital signal processor embedded system; visual feedback control
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