Drone-based displacement measurement of infrastructures utilizing phase information

Drone-based inspections provide an efficient and flexible approach to assessing aging infrastructures while prioritizing safety. Here, we present a pioneering framework that employs drone cameras for high-precision displacement measurement and achieves sub-millimeter accuracy, meeting the requiremen...

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Bibliographic Details
Published in:Nature communications 2024-01, Vol.15 (1), p.395-395, Article 395
Main Authors: Ri, Shien, Ye, Jiaxing, Toyama, Nobuyuki, Ogura, Norihiko
Format: Article
Language:English
Subjects:
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639/766/930/2735
Aging
Bridges
Cameras
Displacement measurement
Girder bridges
Girders
Humanities and Social Sciences
Information processing
Infrastructure
multidisciplinary
Safety
Sampling
Science
Science (multidisciplinary)
System effectiveness
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Summary:Drone-based inspections provide an efficient and flexible approach to assessing aging infrastructures while prioritizing safety. Here, we present a pioneering framework that employs drone cameras for high-precision displacement measurement and achieves sub-millimeter accuracy, meeting the requirements for on-site inspections. Inspired by the principles of human auditory equilibrium, we have developed an effective scheme using a group of strategical reference markers on the bridge girders to measure structural displacements in the bridge. Our approach integrates the phase-based sampling moiré technique with four degrees-of-freedom geometric modeling to accurately delineate the desired bridge displacements from camera motion-induced displacements. The proposed scheme demonstrates favorable precision with accuracy reaching up to 1/100th of a pixel. Real-world validations further confirmed the reliability and efficiency of this technique, making it a practical tool for bridge displacement measurement. Beyond its current applications, this methodology holds promise as a foundational element in shaping the landscape of future autonomous infrastructure inspection systems. Drones are an effective and flexible tool for safety assessment of aging infrastructure, especially in locations with challenging accessibility. Here, authors demonstrate a phase-based sampling moiré technique with a drone for measurement of millimeter-scale infrastructural displacement in bridges.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-44649-2