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- W2013179640 abstract "Along with the incessant advancement in optics, electronics and computer technologies during the last three decades,commercial digital video cameras have experienced a remarkable evolution, and can now be employed to measurecomplex motions of objects with sufficient accuracy, which render great assistance to structural displacementmeasurement in civil engineering. This paper proposes a computer vision-based approach for dynamic measurement ofstructures. One digital camera is used to capture image sequences of planar targets mounted on vibrating structures. Themathematical relationship between image plane and real space is established based on computer vision theory. Then, thestructural dynamic displacement at the target locations can be quantified using point reconstruction rules. Compared withother tradition displacement measurement methods using sensors, such as accelerometers,linear-variable-differential-transducers (LVDTs) and global position system (GPS), the proposed approach gives themain advantages of great flexibility, a non-contact working mode and ease of increasing measurement points. Tovalidate, four tests of sinusoidal motion of a point, free vibration of a cantilever beam, wind tunnel test of a cross-sectionbridge model, and field test of bridge displacement measurement, are performed. Results show that the proposedapproach can attain excellent accuracy compared with the analytical ones or the measurements using conventionaltransducers, and proves to deliver an innovative and low cost solution to structural displacement measurement." @default.
- W2013179640 created "2016-06-24" @default.
- W2013179640 creator A5080651523 @default.
- W2013179640 date "2010-03-25" @default.
- W2013179640 modified "2023-09-25" @default.
- W2013179640 title "A computer vision-based approach for structural displacement measurement" @default.
- W2013179640 doi "https://doi.org/10.1117/12.847119" @default.
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