現今汽車除了講求性能、舒適，行車安全也因為車禍發生頻率的提高而逐漸受到重視。車禍發生時除了車內乘員會受到傷害，車體外的行人等用路人亦同處於危險之中。台灣地區地狹人稠且人口集中於都會區，造就了高機動性與低成本的速克達機車(Scooter)為主要交通工具，但也使得機車成為台灣地區肇事數量最多的車種。都會區道路行人密集度高常造成行人與機車意外事故，而行人與機車意外事故中，機車輪胎與機車前方車體最容易與行人下肢碰觸，造成行人下肢傷害；此外機車行駛於路面濕滑或顛簸情況下容易發生傾倒自摔的情況，傾倒過程可能會壓迫下肢形成傷害。根據案例研究統計，行人下肢為最容易受傷之部位，雖致死率低，但痊癒及復健時間冗長，耗費大量醫療成本，其嚴重性不可忽視。
應用於汽車產業的碰撞人偶之研究發展已行之有年，本研究以歐洲促進汽車安全委員會( EEVC)所訂定出之次系統測試方法，並參考TRL下肢次系統衝擊器電腦模型，設計與製造出實體機械下肢。在設計過程中以EEVC制定的下肢衝擊器規範為設計標準，目的在設計出符合EEVC規範的實體機械下肢，使得實體下肢能夠應用於行人與機車騎士的道路事故安全評估。
在電腦輔助工程設計(CAD)階段時，借助CAD軟體的計算功能以及ANSYS有限元素分析軟體評估實體下肢的關鍵零件是否能通過EEVC所制定的規範。在製造完實體下肢後，採用EEVC制定的下肢衝擊器驗證測試方法對實體下肢進行驗證，探討實體下肢是否符合EEVC制定的每一項規範。在驗證測試完成後，本研究針對機車事故中易受傷的踝關節部位設計足部裝置，可裝置在本研究設計的新型實體下肢上，應用於行人與機車事故中的踝關節傷害評估。

In automobile industry, crash test dummies are commonly used as a tool to measure human injuries. In this study, an adapted dummy sub-system injury assessment method based on the regulation of EEVC (European Enhanced Vehicle-Safety Committee) is proposed simulate and evaluate the injuries of pedestrians. This study will analysis the TRL legform model and found the shortcoming of manufacturing to reality. Propose a new design legform model with following the EEVC lower legform regulation. This new design can be manufactured easily and less component. In addition, this study design the ankle joint and foot that can be combined with the new legform, let the physical legform can measure lower extremities injuries to pedestrians and motorcycle riders.
The CAD software and finite element method software can help the design process, analysis the deformation of knee ligament and shearing displacement spring, and come out new design that can conform with the regulation of EEVC legform. After manufacture all the component and assembling, follow the procedure of EEVC lower legform certification test and approved this new physical legform conform with EEVC lower legform regulations.

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