The quality of underwater bridge piers significantly impacts bridge safety and long-term usability. To address limitations in conventional inspection methods, this paper presents a sonar-based technique for the three-dimensional (3D) reconstruction and visualization of underwater bridge piers. Advanced MS1000 scanning sonar is employed to detect and image bridge piers. Automated image preprocessing, including filtering, denoising, binarization, filling, and morphological operations, introduces an enhanced wavelet denoising method to accurately extract the foundation contour coordinates of bridge piers from sonar images. Using these coordinates, along with undamaged pier dimensions and sonar distances, a model-driven approach for a 3D pier reconstruction algorithm is developed. This algorithm leverages multiple sonar data points to reconstruct damaged piers through multiplication. The Visualization Toolkit (VTK) and surface contour methodology are utilized for 3D visualization, enabling interactive manipulation for enhanced observation and analysis. Experimental results indicate a relative error of 13.56% for the hole volume and 10.65% for the spalling volume, demonstrating accurate replication of bridge pier defect volumes by the reconstructed models. Experimental validation confirms the method's accuracy and effectiveness in reconstructing underwater bridge piers in three dimensions, providing robust support for safety assessments and contributing significantly to bridge stability and long-term safety assurance.

Jianbin Luo

Shaofei Jiang

Yamian Zeng

Changqin Lai

Sensors

SENSORS (ISSN 1424-8220) 为传感器和生物传感器的科学和技术提供了一个高级论坛。它发表评论（包括对完整传感器产品的综合评论）、定期研究论文和简报。我们的目标是鼓励科学家尽可能详细地发表他们的实验和理论结果。论文的长度没有限制。必须提供完整的实验细节，以便重现结果。

"Sensors" (ISSN 1424-8220) is a high-level forum dedicated to the science and technology of sensors and biosensors. The journal publishes various types of articles, including comprehensive reviews of complete sensor products, regular research papers, and brief communications. Our aim is to encourage scientists to share their experimental and theoretical results in as much detail as possible. There is no limit on the length of the papers, but complete experimental details must be provided to allow for the reproducibility of results.

《Sensors》（ISSN 1424-8220）是一个专注于传感器和生物传感器科学与技术的高级论坛。期刊接受各种类型的文章，包括对完整传感器产品的综合评论、定期研究论文和简报。我们的目标是鼓励科学家尽可能详细地分享他们的实验和理论结果。论文的长度没有限制，要求提供完整的实验细节，以便他人能够重现结果。

Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging

ivySCI AI Smartly Parses PDF, Answers Researchers' Questions, and Helps You Understand Papers in Seconds

Journal Info

Category	Quartile
INSTRUMENTS & INSTRUMENTATION	2