International Construction Specialty Conference of the Canadian Society for Civil Engineering (ICSC) (5th : 2015)

An image-based frameworks for automated discrepancy quantification and realignment of industrial assemblies Nahangi, Mohammad; Czerniawski, Thomas; Yeung, Jamie; Haas, Carl T.; Walbridge, Scott; West, Jeffrey


Image-based frameworks for automated as-built modeling and infrastructure 3D reconstruction are increasingly being used in the construction industry. The increasing use of image-based technologies in the construction processes is due to the ease of application, cheap cost of enhancement, time effectiveness and high level of accuracy and automation. Automating the tasks involved in the inspection, quality control and quality assurance (QA/QC) processes are the potential avenues for utilizing such frameworks. This paper presents an image-based approach for acquiring the built status of fabricated assemblies and describes a framework for realigning the defective segments by borrowing concepts from robotics and forward kinematics. A laboratory set of experiments is then conducted to measure the accuracy and performance of the proposed framework for realignment of industrial facilities, in general, and pipe spools, in particular. Results demonstrate that it can be utilized in real cases providing the required level of accuracy as well.

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