由於目前三次元量測路徑規劃的方法需要使用者於三次元量測軟體上針對模型特徵，逐一輸入量測點數、量測點分布方法與量測點序列排序方法等複雜參數，並於實際量測中不斷往返進行修正才能建立完善的量測路徑，過程繁瑣且耗時。然而現有的自動量測路徑規劃研究又多為獨立系統，與工業界常用的CAD/CAM軟體並無連結，以至於技術門檻較高不易跨越。本研究的目的為開發基於Siemens NX軟體的自動化量測路徑規劃程式，藉由Siemens NX軟體提供的NX Open函式庫，使用C#程式語言進行二次程式開發，將量測路徑規劃的工作自動化，達到節省時間、人力成本與降低技術門檻的目標。
本研究中所開發的自動化量測路徑規劃程式，可對模型中的特徵自動標註圓弧面之半徑尺寸、兩平行平面之間的平行距離尺寸以及特徵之深度與高度尺寸，並藉由量測設備模型，令系統中的模擬環境與真實量測情形更加貼近，隨後自動建立三次元量測所需的量測特徵、量測路徑、容差等物件，於路徑規劃的同時便將預期碰撞的路徑進行修正，最後將路徑規劃結果透過Siemens NX軟體的後處理器轉譯為三次元量測的程式碼，綜合上述一系列流程達到自動化量測路徑規劃的成果。根據本論文中的兩個實例驗證結果，實例驗證一的量測路徑規劃時間由人工規劃的20分鐘縮短為19秒鐘，實例驗證二的總和路徑規劃時間由89分鐘縮短為4分15秒，證實由程式進行量測路徑自動規劃確實可以節省大量的時間與人力成本，並於實例驗證二的實際量測中確認程式進行自動路徑規劃的可行性。本研究經由程式的開發達成將量測路徑規劃的工作自動化，並透過Siemens NX軟體連結CAD中的模型資訊，降低使用三次元量測進行產品檢測的技術門檻，故此對三次元量測的推廣以及精密產業的發展有實質上的助益。

The inspection planning method of nowadays coordinate measuring machine is time-consuming. Users are required to not only input complex parameters such as the point number, the distribution method and the sequencing method for each feature in 3D models, but also continuously modify the inspection path during operation. As a result, the need for automated inspection planning emerges. However, the existing researches about automated inspection planning fall short to combine with commercial CAD/CAM software so that the technical barrier of this method is not easy to overcome. The objective of this study is to develop an automated inspection planning program based on Siemens NX. With the NX Open API provided by Siemens NX, our secondary development program was developed in C# programming environment to reduce time cost and human resources, and to make this technique more accessible.
The automated inspection planning program developed in this study can automatically dimension the radius of circular surfaces, the distance between two parallel plane, the depth and the height of model’s features. Furthermore, with our program, the simulation environment can get closer to the reality by importing models of measuring equipment. The three-dimensional measuring elements can be automatically generated such as inspection features, inspection paths, and tolerances. The anticipated collision paths are corrected immediately after the path planning. Finally, inspection paths are translated into DMIS by NX postprocessors. The above series of processes achieves our objective of automate inspection planning. In this paper, we verify the feasibility of our program with two examples. In the first example, the inspection planning time is shortened from 20 minutes to 19 seconds. And for the second example, the time is shortened from 89 minutes to 4 minutes and 15 seconds. These two examples demonstrate that the automated inspection planning program can save lots of time and labor costs. Meanwhile, the inspection test of the second example confirms the feasibility of inspection paths generated by the program.
This study successfully developed an automated inspection planning system through the secondary development program, and relates the model information in CAD to Siemens NX software. Thereby, our program reduces the technical barrier for product inspection using the coordinate measuring machine. Our research results would have positive effects to the promotion of coordinate measuring machines and the development of precision industry.

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