機械加工流程中，上機階段的刀具安裝是影響加工成果的關鍵。然而使用人工量測刀具存在誤差，容易造成撞機情況發生，增加機臺維修成本。為了解決這個問題，本文提出使用擴增實境技術讓使用者可以直觀地查看目前採用的刀具是否正確，減少採用錯誤刀具的機會，並開發了應用擴增實境技術之刀具安裝輔助系統。本系統可以使加工者直接使用行動裝置取得機臺影像定位刀具，並結合相機相關參數量測刀具長度。實驗證明，本系統估計的刀具長度，可以取得最小誤差平均值5.12mm，最大誤差值10.25mm，與目前在行動裝置上基於圖像的測距方法比較，本系統可以達到最好的測距效果。目前可在CNC機臺上使用本系統，並配合控制器的線上量測功能，取得精確之刀長量測結果。

Tool installation lies in the heart of the impact on processing result in mechanical machining process. However, a measuring error exists in the tool length of manual measurement is likely to cause a collision situation and increase the maintenance cost of the machine. To address this problem, we develop a tool installation auxiliary system using Augmented Reality (AR). By using the AR, we can allow users to visually check whether the currently used tool is correct in decrease the chance of setting up the wrong tool. In our system, the operator uses the mobile device to obtain tool position from machine snapshot and measures the tool length with camera related parameters. Then, user obtains accurate tool length from measurement function of the machine controller. Lastly, we evaluate our proposed system with error average value. The proposed method achieves state-of-the-art image-based distance measurement performance on mobile device by 5.12mm for minimum value and 10.25mm for maximum result, as well as being the best method on CNC machine to obtain accurate tool length.

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