本研究旨在探討透地雷達（Ground Penetrating Radar, GPR）影像與3D幾何模型之整合，動機源自現有GPR多以2D雷達圖呈現，缺乏明確的座標基準與幾何脈絡，導致判讀高度依賴個人經驗。為形成可稽核與可傳遞的共通語言，本研究的目的是建立一套GPR B-scan 影像與三維幾何模型對位之基準架構，使影像能在穩定的空間座標與尺度下定位、被檢核並作為工程決策之有效依據。 研究以實驗室混凝土試體為對象，使用1.6 GHz透地雷達量測，並於三維模型環境中設計包含：（1）影像標準化、（2）模型與切面建構、（3）UV 貼圖與B-scan影像貼附、（4）精度檢核與可攜式檔案結構建置等流程，採用水平方向均方根誤差（RMSE）須小於2mm或0.5%·Lx 作為對位標準，以檢驗疊合精度與流程可重現性。結果顯示，三組試體皆滿足預設精度標準，且OBJ、MTL、圖像檔與語意描述檔可於不同軟體環境中正確載入，證實本研究所建構之流程在對位精度與檔案可攜性方面具可行性。 經整合後，疊合圖可同時呈現雷達反射特徵與構件幾何位置，有助於 GPR 技術人員與設計、維護單位在共同空間語境下討論異常訊號與潛在劣化區域，提升溝通效率與判讀透明度，未來可在此基準架構之上，進一步導入自動化影像判讀、結合BIM與數位孿生並擴展至實橋與既有結構之長期監測與維護決策應用。;The objective of this study is to establish a baseline framework for aligning GPR B-scan images with three-dimensional geometric models, enabling radar images to be placed in a consistent spatial coordinate system and scale and objectively verified for engineering use. Laboratory concrete specimens were scanned with a 1.6 GHz GPR, and a workflow was developed including: (1) image standardization, (2) 3D model and cutting-plane construction, (3) UV mapping with B-scan attachment, and (4) accuracy verification with a portable file structure. Alignment accuracy was evaluated using a horizontal RMSE criterion of < 2 mm or < 0.5%·Lx. All three specimens met the predefined threshold, and the OBJ/MTL, image, and semantic description files were successfully loaded across different software environments, demonstrating both alignment feasibility and file portability. The integrated visualization supports clearer cross-disciplinary discussion of anomalous signals and potential deterioration zones. Future work will focus on automated interpretation and integration with BIM/digital twins for long-term monitoring of in-service structures.
