CHEN Hai-yong, LI Ze-nan, SUN He-xu etc. Visual detection system design for profile of special-shaped stamping parts[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 229-236
CHEN Hai-yong, LI Ze-nan, SUN He-xu etc. Visual detection system design for profile of special-shaped stamping parts[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 229-236 DOI: 10.3788/OPE.20162413.0229.
Visual detection system design for profile of special-shaped stamping parts
In order to realize the profile defect detection for the special-shaped stamping parts
a visual detection system was designed. The hardware components and working principle of the system were introduced. In this system
the profile of parts was extracted by using the level set method combined with Chan-Vese model based on its irregular shapes. In the Chan-Vese Model
energy function was set up and optimized in order to enable the profile curve approaching the profile boundary of the stamping parts in the collected image
thus effectively controlling the noise interference improving the extraction accuracy. Finally
the defect of the stamping parts was indentified according to the multi-sample hu moment parameter and areal sampling threshold which generated from the hu invariant-moment profile matching and area matching methods respectively. The defect identification method was characterized by rotation
translation invariance and good robustness. The results indicate that the system can detect defects over 0.5% of the overall part with high detection precision
and is suitable for profile defect detection demand for high stability and security as well as high precision.
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references
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