隨著產品品質上要求，三次元量床(coordinate measuring machines，CMM)在工業界上的使用已相當普遍。量床種類有接觸式及非接觸式兩種，由於接觸式量床量測精度高，也方便撰寫量測程式，更可以修改量測路徑做彈性的應用，相對於非接觸式量測，缺點在於量測速度慢及無法對軟性物質進行量測，優點在於高精度以及對基本尺寸的檢驗甚至是凹孔特徵的量測，其適用性都較非接觸式量測為廣。本篇論文主旨在討論以CAD模型為依據，針對接觸式量床，發展量測路徑自動規劃技術。
量測路徑規劃內容包括：產生量測點與後退點、探針角度自動判斷、碰撞迴避、碰撞偵測以及路徑模擬等。經由CAD模型的曲線和曲面，以短時間且簡單的步驟獲得量測點與後退點，再配合適當的探針角度，此時的路徑可能有碰撞的情況，需要適當的碰撞迴避及碰撞偵測機制，輔助達到無碰撞狀態。開發虛擬環境，在量床上線量測前，先在軟體內模擬量測狀況，也可對路徑各參數加以修改及再規劃，以達到合適的量測路徑。

Study of CAD-Added Measuring Path Plnning

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