A robust approach to calculating bridge displacements from unfiltered accelerations for highway and railway bridges

Bunce, Andrew; Hester, David; Taylor, Su; Huseynov, Farhad; Xu, Yan

doi:10.1016/j.ymssp.2023.110554

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…Bridge displacement is a critical index for SHM (Brownjohn et al, 2017) and can be measured by displacement transducers, such as linear variable differential transformers (Boothby et al, 1998), global positioning systems (GPS; Le & Nishio, 2019;Msaewe et al, 2021;Nakamura, 2000), potentiometric displacement sensors (Guo et al, 2015), dial gauges (Bidez et al, 1986), and optic fiber sensors (Hampshire & Adeli, 2000). Additionally, displacement can be indirectly estimated through methods such as strain (Oh et al, 2017), double integration of acceleration data (Bajwa et al, 2020;Bunce et al, 2023;K. Feng et al, 2023;F.…”

Section: Introductionmentioning

confidence: 99%

Real‐time displacement measurement for long‐span bridges using a compact vision‐based system with speed‐optimized template matching

Wang,

Xu,

Koo

et al. 2024

Computer aided Civil Eng

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This paper introduces a new accelerating algorithm, efficient match slimmer (EMS), specifically designed to lighten computational loads of sophisticated template matching algorithms, enabling these algorithms to be effectively run on single‐board computers. Utilizing EMS in conjunction with a robust template matching algorithm, we have developed Raspberry Vision—a compact, cost‐effective, and real‐time vision‐based system. Its compactness and portability facilitate a practical measurement strategy that not only minimizes the camera‐to‐target distance but also simplifies the camera calibration process in bridge displacement monitoring, thereby enhancing measurement accuracy. The performance of the system is estimated on two operational suspension bridges. The results demonstrate that Raspberry Vision, equipped with the measurement strategy, can significantly improve the measurement accuracy in the long‐span bridge test and is also suitable for cross‐sea bridge measurements.

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