Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2217
標題: 光彈參數互相影響問題之排除與修正
Elimination and correction of the interactions between the photoelasticity parameters
作者: 宋泊錡
Sung, Po-Chi
關鍵字: Photoelasticity;光彈;Ambiguity;Isoclinic;Region;Phase unwrapping;模糊;等傾角;區域;相位展開
出版社: 機械工程學系所
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摘要: 
光彈之所以能夠取得全場應力資訊歸因於其等色參數以及等傾角參數,然而在相移法中其存在著此兩參數的互相影響問題,其會導致兩參數存在著不可定義區域以及模糊區域,本文除了利用平偏四步結合多波長法以及圓偏六步來修正此兩參數中不可定義區域外,也發展了一個演算法來解決模糊區域,此演算法主要是利用影像處理方式對等傾角參數作相位展開,其處理過程包含端點相連以及區域劃分,實驗中即使當試件包含等力點時其仍能得到正確的結果和良好的處理時間,也驗證了本文所使用的架構與理論的可行性。

The reason that we can conveniently obtain the full-field stress information from photoelasticity is due to it provides two parameters, isochromatic and isoclinic, by the polariscope. However, the phase-stepping method will produce the isoclinic-isochromatic interactions that is undefined region and ambiguity(ambiguous region) on the phase maps of photoelasticity. So, the paper presents a method to eliminate and correct the undefined region and ambiguity by the polariscope configuration and phase unwrapping algorithm, respectively. The former, the configuration is based on the four-step plane polariscope with white light and six-step circular polariscope with monochromatic light, and the latter, the algorithm is a phase unwrapping technique that is based on image processes involved in connecting points and region split for the isoclinic parameter. The correct experimental result and fine process time confirmed the availability and benefit of the configuration and algorithm proposed in the paper.
URI: http://hdl.handle.net/11455/2217
其他識別: U0005-1008200914423900
Appears in Collections:機械工程學系所

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