微型鑽針朝向精密化製程的發展，製造商為確保品質導入心厚特徵的量測。本研究參考現有的量測機台，重新設計製作完成一套新型破壞式微型鑽針機器視覺心厚量測系統，著重於鑽針定位分析、UC型心厚量測方法及效能的優化。在鑽針定位分析方面，本系統增加了鑽針長度的差異性量測，使得量測時具備著相同量測基準的條件。對於心厚量測程序，本研究先取得心厚之圖像，經二值化、測邊等影像前處理後，再由邊點資料以最小平方擬圓方法取得心厚值。前述方法，經實驗結果顯示具有±1.5μm之重現性且最大誤差在2μm以內。至於效能改善部分，系統經由重新的配置與修正研磨程序後，相較於現有的量測機台，能減少百分之四十的量測時間。

The quality requirement of micro drills is increasing, with respect to the tendency of high precision and miniaturization development. In order to ensure the product quality, the micro drill manufacturers utilized new inspection instruments to conduct the quality control of a microdrill. Considering the design and quality inspection of a microdrill, the web thickness is one of the key factors. As a result, this study developed a destructive visual inspection system for the application of web thickness measurement of a microdrill. The developed concept of this system is to modify and improve the performance of an existed web thickness system. This new system focused on the drill positioning analysis, the investigation of UC-type core web thickness measurement methods, and the whole system optimization. Concerning the drill positioning analysis, this study has overcome the length differences of the micro drills, in which the measurements could be executed under the same reference level conditions. Regarding the investigation of UC-type core web thickness measurement methods, the web thickness image acquisition is first executed, then the binary image is implemented, finally, the edge detection method of a binary image is performed to get the edge boundary data points. The least squares circle method was used to calculate the web thickness. Experimental results show that the repeatability of the development system was ± 1.5 μm and the maximum error was less than 2 μm. After reconfiguring and modifying the grinding process sequence, the measuring time was improved about 40 percent compared with the existed system.

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