Vacuum Casting Bubble Automatic Elimination System Based on on-Line Machine Vision Detection

Abstract:

Bubbles in vacuum casting process are dense, tiny and overlapped. The difference between bubbles and the background is so indistinct that makes bubble detection a great difficulty. Bubble elimination has become the main obstacle in the way of vacuum casting machine’s automation development. Bubble automatic detection is the base of bubble elimination. A machine vision bubble on-line detecting and eliminating platform is constructed, using industrial high-speed CCD camera and professional LED illumination. According to the features of vacuum casting bubbles, the edge pixel ratio algorithm is designed especially for vacuum casting bubble detection. The algorithm is realized using VC++ and Open CV. The integrated system proposed can detect and eliminate vacuum casting bubbles on-line automatically. As it’s confirmed, there is an obviously positive correlation between the edge pixel ratio and the bubble denseness. This detection system makes sense in vacuum casting bubble elimination.

• Periodical: Advanced Materials Research (Volume 670)
• Pages: 222-227
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.670.222
• Online since: March 2013
• Authors: Y.Y. Liu, Z.F. Chi, Q.X. Hu, Y. Yao, J. Huang
• Keywords: Bubble Detection, Edge Pixel Ratio, Machine Vision, Vacuum Casting

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