工學院: 機械工程學研究所指導教授: 陳亮嘉曾桓鈺Tseng, Huan-YuHuan-YuTseng2017-03-132018-06-282017-03-132018-06-282016http://ntur.lib.ntu.edu.tw//handle/246246/278265在光學三維量測領域中，目前一般使用條紋反射法對鏡射面物體進行三維形貌量測。但鏡射面量測系統在遇上具有較大曲面的鏡射面物體時，往往會因為光資訊無法反射回感測器，而有部份區域無法量測。鏡射面量測系統無法量測大曲面鏡射物體的問題，實際上屬於斜率量測範圍的問題。本研究用座標化的量測系統模型，並對物體的斜率量測範圍進行推導，從推導的數學幾何模型參數結果中，提出較適合於量測大曲面鏡射物體的一種光學量測系統設計。 本研究亦提出一種量測方法，使用格雷碼作為條紋結構光，以兩個閾值進行條紋結構資訊編碼，運用物體邊緣陰影資訊，基於三維向量的概念，計算資訊重建初始值，並以路徑積分法重建物體整體表面高度資訊。量測實驗結果證明，本研究量測系統的量測最大三維誤差，可以控制在待測物體最大水平尺寸的0.35%以下，並且最大可量測到表面斜率分佈為 -0.5 ~ 0.5 的大曲面鏡射物體。同時，本研究的量測系統適用於量測球面和自由曲面的鏡射面樣本。Nowadays, the fringe reflection technique is widely used to measure specular objects. However, the exiting specular surface measuring system cannot measure objects with highly curved surface. Because the highly curved surface means that the surface slope distribution range is too large to be measured. In this research, a coordinate system model is used to describe all the parameters in the system and provide a model of optical system design having large slope measurable range from derived model. This research also provides a measuring method which uses Gray Code as structured light and uses two thresholds for encoding structured light information to calculate the initial height value using shadow information next to object’s edge based on three-dimensional vector concept. Then, use the path integration method to reconstruct the whole object surface. It is proved, the maximum error of the proposed system can be controlled under 0.35% of the lateral size of measured samples and the slope measurable range of the proposed system is -0.5 ~ 0.5. At the same time, the proposed system is suitable for measuring spherical and free-form specular objects.4032432 bytesapplication/pdf論文公開時間: 2021/8/23論文使用權限: 同意有償授權(權利金給回饋學校)鏡射面三維形貌量測格雷碼路徑積分Specular Surface ProfilometryGray CodePath Intergrationthesis10.6342/NTU201600817http://ntur.lib.ntu.edu.tw/bitstream/246246/278265/1/ntu-105-R03522723-1.pdf