초음파 어레이 이미징과 압축센싱 기법을 활용한 콘크리트 구조물의 대면적 내부 이미징

초록

Ultrasonic array imaging technology has a high potential for detecting internal damages in concrete structures, yet its limited imaging area poses challenges for diagnosing large concrete structures. This study proposed an ultrasonic array imaging method that efficiently images large areas of concrete structures by utilizing a compressed sensing technique. The proposed method uses sparsely sampled array data to reconstruct imaging results equivalent to those obtained from densely sampled grids, significantly reducing the data acquisition time for large inspection areas. Field experiments were conducted on actual concrete structures at a ship mooring facility to evaluate the performance of the proposed technique. The results demonstrated the possibility of reconstructing dense array images using only 50% of the array data typically required for dense sampling.

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