Noncontact Dynamic Three-Component Displacement Measurement with a Dual Stereovision-Enabled Uncrewed Aerial System
Measuring the dynamic displacements of a structure provides a comprehensive understanding of the structure, especially when subjected to different types of dynamic loading (i.e., wind, traffic, impact loads, blast loads). Despite their usefulness, direct displacement measurements are typically not collected due to the cumbersome logistical issues of sensor placement and maintenance and the impracticality of instrumenting contact-based sensors across all significant structures. In this context, this study proposes a novel dual stereo vision technique to measure the dynamic displacement of structures using a portable, non-contact measurement system that involves an uncrewed aerial system (UAS) and four optical cameras. One pair of cameras tracks the three-component (x, y, and z) motion of a region of interest (ROI) on a structure with respect to the UAS system; the other pair of cameras measures the six degrees of freedom motion (6-DOF) (both rotational and translational motion) of the UAS system by tracking a stationary reference. The motion of the UAS is then compensated for to recover the true dynamic displacement of the ROI. The proposed dual stereo vision technique realizes simultaneous measurement of all three components of the structure’s displacements and 6-DOF of UAS motion through a mathematically elegant process. The unique dual stereo vision technique allows flexibility in choosing a global reference coordinate system, greatly enhancing the feasibility of applying the new technology in various field environments. This new technique has overcome the major challenge of significant UAS motions in full-scale applications. Furthermore, this technique relies on natural features and eliminates the requirement of artificial targets on the structure, permitting applications to difficult-to-access structures.
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Supplemental Notes:
- This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
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Corporate Authors:
Colorado State University, Fort Collins
Department of Civil and Environmental Engineering
Fort Collins, CO United States 80525 North Dakota State University
Fargo, ND United States 58108Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 -
Authors:
- Perry, Brandon J
- Guo, Yanlin
- Atadero, Rebecca
- Publication Date: 2024-9
Language
- English
Media Info
- Media Type: Digital/other
- Edition: Final Report
- Features: Figures; Photos; References; Tables;
- Pagination: 37p
Subject/Index Terms
- TRT Terms: Bridges; Cameras; Dislocation (Geology); Drones; Dynamic loads; Inspection; Structural health monitoring
- Subject Areas: Bridges and other structures; Data and Information Technology; Highways; Maintenance and Preservation;
Filing Info
- Accession Number: 01938773
- Record Type: Publication
- Report/Paper Numbers: MPC-680, MPC 24-553
- Files: UTC, NTL, TRIS, USDOT
- Created Date: Dec 5 2024 9:38AM