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Abstract: The
ways to vision detecting arc welding pool information and image-getting
mechanisms are theoretically analyzed. For visional information of pool
in short circuiting transfer and spray transfer, the idea to fully use
radiation of pool and acquire image of pool in the near-infrared bands
are put forward. Four kinds of compound narrowband filters based on
three kinds of mechanism are adopted, from these experiments, it is
known that near-infrared bands are the best window to acquire pool image
and the selection of the window should approach maximum detection
wavelength of CCD camera. In this window, clear images of pool area are
acquired. The signal-to-noise of visional pool information and influence
factor of it are explored. Typical characters of MAG welding pool are
analyzed.
Key words:MAG
welding Weld pool Vision detection Near-infrared bands Compound
filters CCD camera
CLC No: TH132.4 TG409
江苏省高新技术资助项目(BG2002021).
Received 20030604, received in revised form 20030805 |