Full-field 3D measurement using multi-camera digital image correlation system

Chen, Fanxiu; Xu, Chen; Xie, Xin; Feng, Xiu; Yang, Lianxiang

doi:10.1016/j.optlaseng.2013.03.001

Cited by 206 publications

(77 citation statements)

References 25 publications

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“…This includes the synchronised measurement of large structural deformations, changes in angle of attack and associated tip vortex motions. (Raffel et al, 2007;Chen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty assessment of coupled Digital Image Correlation and Particle Image Velocimetry for fluid-structure interaction wind tunnel experiments

Giovannetti

Banks

Turnock

et al. 2017

Journal of Fluids and Structures

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The development of advanced composite structures for maritime and aerospace applications requires the ability to quantify their actual performance under known fluid loads. One example is the need to investigate the differences in fluid-structure response of passive adaptive composite structures. A wind tunnel based method is used to quantify the structural behaviour, and fluid response, of a flexible aerofoil under fluid loading. The technique measures the deflection of the structure, with high speed stereoscopic Digital Image Correlation (DIC). The tip vortex position is measured using high resolution stereoscopic Particle Image Velocimetry (PIV). The accuracy of the two full-field optical measurement systems is quantified and the effect of optical interactions is assessed. A flexible NACA0015 rectangular plan-form aerofoil of 0.9 m span and aspect ratio of two is subjected to aerodynamic loading within a closed circuit wind tunnel. The wind speed was varied from 10 to 25 m/s within a 3.5 m x 2.4 m working section. The structural response is measured simultaneously with the fluid flow field around the tip vortex. The tip vortex core, which moved by ≈ 62 mm at the highest wind speed, is directly compared to the deformation of the structure, which deflected by ≈ 58mm. A maximum foil twist of ≈ 0.6 deg was observed. The DIC accuracy is evaluated in static and transient conditions for translational and rotational movement. The DIC maximum error for translations, greater than or equal to 0.5 mm, is less than 3% and less than 0.6% in dynamic motions. The DIC total error for rotations is less than 5% in static motions and 1% in Email address: L.Marimon-Giovannetti@soton.ac.uk (L. Marimon Giovannetti) Preprint submitted to Journal of Fluids and StructuresOctober 21, 2016 dynamic rotations. The PIV uncertainty is quantified a posteriori providing the errors due to the correlation algorithm and the experimental setup. The mean in-plane velocity component uncertainties in the vortex region varied between 1.2% and 3.5% depending on flow speed (≈ 0.1 px) around the vortex structure. The mean out-of-plane velocity uncertainty around the vortex varies between 2% and 3.3% depending on flow speed.

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“…This includes the synchronised measurement of large structural deformations, changes in angle of attack and associated tip vortex motions. (Raffel et al, 2007;Chen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty assessment of coupled Digital Image Correlation and Particle Image Velocimetry for fluid-structure interaction wind tunnel experiments

Giovannetti

Banks

Turnock

et al. 2017

Journal of Fluids and Structures

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“…As this system was equivalent to three cameras installed at different angles, its calibration and image correlation can refer to the ordinary multi-camera DIC system. Chen's solution is suitable for the proposed system [21]. In theory, white light illumination can be used for this system as long as the cross dichroic prism has the right bandwidth.…”

Section: Methodsologymentioning

confidence: 99%

A Cross-Dichroic-Prism-Based Multi-Perspective Digital Image Correlation System

Dan

Zhao

et al. 2019

Applied Sciences

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A robust three-perspective digital image correlation (DIC) system based on a cross dichroic prism and single three charge-coupled device (3CCD) color cameras is proposed in this study. Images from three different perspectives are captured by a 3CCD camera using the cross dichroic prism and two planar mirrors. These images are then separated by different CCD channels to perform correlation calculation with an existing multi-camera DIC algorithm. The proposed system is considerably more compact than the conventional multi-camera DIC system. In addition, the proposed system has no loss of spatial resolution compared with the traditional single-camera DIC system. The principle and experimental setup of the proposed system is described in detail, and a series of tests is performed to validate the system. Experimental results show that the proposed system performs well in displacement, morphology, and strain measurement.

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“…This correlation function is highly recommended by the literature, as it is capable of compensating unexpected intensity changes [2], [10], [11].…”

Section: B Feature Tracking and Image Registrationmentioning

confidence: 99%

Hybrid 3D Dynamic Measurement by Particle Swarm Optimization and Photogrammetric Tracking

Shahbazi¹

2013

Measurement Science Review

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High-accuracy motion modeling in three dimensions via digital images has been increasingly the matter of interest in photogrammetry and computer vision communities. Although accurate sub-pixel image registration techniques are the key elements of measurement, they still demand enhanced intelligence, autonomy, and robustness. In this paper, a new correlationbased technique of stereovision is proposed to perform inter-frame feature tracking, inter-camera image registration, and to measure the 3D state vector of features simultaneously. The developed algorithm is founded on population-based intelligence (particle swarm optimization) and photogrammetric modeling. The proposed technique is mainly aimed at reducing the computational complexities of non-linear optimization methods of digital image registration for deformation measurement, and passing through 2D image correlation to 3D motion modeling. The preliminary results have illustrated the feasibility of this technique to detect and measure sub-millimeter deformations by performing accurate, sub-pixel image registration.

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Full-field 3D measurement using multi-camera digital image correlation system

Cited by 206 publications

References 25 publications

Uncertainty assessment of coupled Digital Image Correlation and Particle Image Velocimetry for fluid-structure interaction wind tunnel experiments

Uncertainty assessment of coupled Digital Image Correlation and Particle Image Velocimetry for fluid-structure interaction wind tunnel experiments

A Cross-Dichroic-Prism-Based Multi-Perspective Digital Image Correlation System

Hybrid 3D Dynamic Measurement by Particle Swarm Optimization and Photogrammetric Tracking

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