Dynamic deformation measurement of real bridge using sampling moire camera

Hara, Takuya; Nakabo, Makiko; Fujigaki, Motoharu

doi:10.1109/anthology.2013.6784783

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…This system can also be used for monitoring other types of building structure deformation dynamically [10]. It is difficult to reach or realize real-time monitoring during the construction process of the machinery and buildings [11]. By using our method and the program, one can install the cameras with various higher performance indicators near the scene without any dangerous accidents.…”

Section: The Conclusionmentioning

confidence: 99%

Research on Instantaneous Dynamical Deformation Monitoring the Masonry Structure Based on Artificial Earthquake Motion

Zhao¹,

Wu²,

Yu³

2015

IJHIT

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First, we describe some properties of the masonry structures. It is an urgent task to ensure the safety of the masonry structure by using information technology to monitor the instantaneous deformation dynamically and find out clues of potential hazard real time. This essay gives an empirical research with three-dimensional motion parallax (3-DMP) to this problem, besides; the grey theory model is used to analyze the deformation. The Artificial Earthquake Motional Model (AEM)and the developed software for static and dynamic analyses of different types of masonry structures are illustrated. The combination of multi-technology methods can overcome the error, and play an important role in improving the safety and reliability of the masonry structure. With the analyzed and processed data from digital cameras effectively, we get a precision result approximately equal 2.1‰.

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Section: The Conclusionmentioning

confidence: 99%

Research on Instantaneous Dynamical Deformation Monitoring the Masonry Structure Based on Artificial Earthquake Motion

Zhao¹,

Wu²,

Yu³

2015

IJHIT

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“…Likewise, in terms of applications in the field of civil engineering, the method was able to detect submillimeter deflection effectively in an experiment conducted on a ceiling-traveling crane [7]. Another application was conducted on a fixed concrete bridge to conduct dynamic deformation measurements by the movement of a train in real-time [21]. Moreover, this has been expanded to the displacement measurement of a concrete bridge for a high-speed railway in Japan using retroreflective moiré markers.…”

Section: Introductionmentioning

confidence: 99%

“…The two-dimensional (2-D) in-plane displacements at multiple locations could be easily measured from recorded digital images [11], even for the measurement of the deflection and vibration of a large-scale concrete bridge from captured video with a commercial cinema camera [12] in recent times. Further, in terms of experiments, comparative experiments conducted in a columnar cantilever beam connected to a loading jack and laser displacement meter demonstrated the effectiveness of the method for deformation measurement when the errors between the measurements were compared [14,21]. Different cameras were used for the damage detection of bridges under different loading conditions [22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

CCTV Camera Array for the Displacement and Strain Measurement of a Beam Specimen in a Laboratory

2022

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The available conventional sensors, like displacement transducers, used in the Structural Engineering Laboratory are expensive. In addition to that, the need for data acquisition devices also escalates the expense invested in point contact measurement systems. The recent appeal of vision-based measurement and the search for cost-effectiveness has led to an exploration of the established sampling moiré method using cheap closed-circuit television (CCTV) cameras as a viable option. The sampling moiré method is simple and analyzes the displacements from grating images by a phase-shifting method. Several trial experiments were conducted, which demonstrated that the setup is at least as accurate as the traditional measuring system. An experiment was conducted on a steel I-beam for displacement measurement, which displayed satisfactory results. In addition, the setup was also tested for strain measurement, and it has yielded promising results that need fine-tuning. This paper discusses the challenges, findings, and the possibility of incorporating vision-based displacement measurements in laboratory platforms.

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“…The DCRP method also can be applied to monitor the deformation on the large structure such as a bridge, a steel tower, and tall buildings [14]. The method can give us a convenient, cheap, and precise way to monitor the structures instantaneously, dynamically and real time.…”

Section: Main Conclusionmentioning

confidence: 99%