ベーンポンプ用ベーンの平面部・曲面部上欠陥検出の自動化

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タイトル別名
  • Automatic Detection Technology for Defects on Planar and Cylindrical Surfaces of Vanes Used for Vane Pumps.
  • ベーンポンプヨウ ベーン ノ ヘイメンブ キョクメンブ ジョウ ケッカン ケンシュツ ノ ジドウカ

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A machine that can detect automatically defects such as flaws, notches and scratches on edges or planar and cylindrical surfaces of vanes has been developed. Most flaws on the edge can be detected using the technique of "oblique illumination and normal detection", but the flaws inclined largely toward the surface of machine parts cannot be detected by the above-mentioned technique. In this paper, we clarify that such flaws with large inclination on the edge, and notches and scratches, on the surface can be detected using the technique of illumination and detection normal to the surfaces of vanes. Defect candidates are recognized by binarizing the detected image and the maximum lengths "l" and the areas "a" are counted. "a0" is calculated in order to eliminate a sampling error which is generated in the binarizing process, where a0is 1.3l. Experimental results reveal that the defect candidates with areas larger than max(20, a0) pixels are true defects.

収録刊行物

  • 精密工学会誌

    精密工学会誌 68 (12), 1549-1553, 2002

    公益社団法人 精密工学会

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