A kind of intelligent visual sensor system, which is mainly composed of a laser lighting source and an intelligent camera
based on FPGA and DSP, is designed using the triangle structured light principle for laser welding seam recognition.
Intending to meet the high-precision demands, on one hand, the components of the sensor such as the lighting source, the
optical lens, the optic sensor of the camera are selected and the errors caused by these parts are analyzed. Furthermore,
the triangle structured light principle models are built and the simulation is given to optimize the light path parameters.
On the other hand, the methods of the image processing for seam recognition using intelligent camera based on FPGA
and DSP are explained. Experiments results proved that the sensor design is reasonable and the image recognition
methods are rational and effective. Very compact structure, high-precision and high-real-time performance are integrated
in this sensor, so it can be applied well in the seam tracking and inspection system in the laser welding and arc welding
fields.
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