Date of Award
Open Access Dissertation
Civil and Environmental Engineering
A critical aspect of civil infrastructure is structural health monitoring, of which digital image correlation (DIC) has been proven to be an effective and appropriate method. There is sufficient literature on the use of stationary DIC, but an unexplored aspect is DIC-equipped unmanned aircraft systems. It has been verified in University of South Carolina labs but has not been proved in a field environment. One of the challenges of field implementation is large scale speckle application. This work focusses on identifying and addressing challenges in bringing UAV-DIC technology from the lab to the field. This includes the development of optimized procedures and methodologies for speckle application, specifically on large-scale specimens within civil infrastructure. Various application methods including speckle-by-speckle application, roller with white ink directly onto weathered steel, roller with black ink onto a white background, and printed speckle were tested in terms of feasibility and quality of the pattern. These methods along with the advantages, shortcomings, and potential resolutions are discussed in this work. It was determined that handheld printers used in tandem with guides and painters’ tape and different bitmaps on a scrubbed, white painted background were recommended for many applications. Recommendations for future work include investigating the durability of the adherence of the self-adhesive sheets, viability of white ink printed onto the surface, and a speckle pattern printed onto transfer paper.
Wyatt, T.(2023). Speckle Development and Application in UAV-Based Digital Image Correlation for Transportation Infrastructure Monitoring And Assessment. (Doctoral dissertation). Retrieved from https://scholarcommons.sc.edu/etd/7346