A point tracking method of Tracking-Detection-Deformation Matching for structural vibration measurement

Junhao Lv; Lu Yang; Qun Lou; Jinyou Xiao; Ning Guo

doi:10.1117/12.2611627

22 October 2021 A point tracking method of Tracking-Detection-Deformation Matching for structural vibration measurement

Junhao Lv, Lu Yang, Qun Lou, Jinyou Xiao, Ning Guo

Proceedings Volume 11928, International Conference on Image Processing and Intelligent Control (IPIC 2021); 119280X (2021) https://doi.org/10.1117/12.2611627
Event: International Conference on Image Processing and Intelligent Control (IPIC 2021), 2021, Lanzhou, China

Abstract

Computer vision-based methods have been extensively used in vibration measurement of engineering structures in recent years. However, vibration testing of engineering structures usually requires both the high accuracy for low displacement and robustness of the modal test, which is difficult for most vision-based methods. In the current work, we propose a vibration displacement extraction method based on point tracking, Tracking-Detection-Deformation Matching (TDDM), which combines the advantages of both the detection and tracking. Firstly, TDDM used the tracking method to obtain the initial local motion region; Then, the tracking error in the local region was corrected by the detection method; Finally, based on the correction result, the local deformation matching was designed to improve the signal-to-noise ratio of low displacement. The effectiveness of the TDDM tracking algorithm is verified by vibration experiments of Bench-scale building structures. The experimental results demonstrate the robustness and high accuracy of the proposed method in structural vibration measurement.

Citation Download Citation

Junhao Lv, Lu Yang, Qun Lou, Jinyou Xiao, and Ning Guo "A point tracking method of Tracking-Detection-Deformation Matching for structural vibration measurement", Proc. SPIE 11928, International Conference on Image Processing and Intelligent Control (IPIC 2021), 119280X (22 October 2021); https://doi.org/10.1117/12.2611627

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KEYWORDS

Vibrometry

Optical tracking

Detection and tracking algorithms

Image processing

Optical flow

Signal to noise ratio

High speed cameras

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