Integrating fringe projection and digital image correlation for high-quality measurements of shape changes

Felipe-Sesé, Luis; Siegmann, Philip; Díaz, Francisco; Patterson, E. A.

doi:10.1117/1.oe.53.4.044106

Cited by 24 publications

(12 citation statements)

References 11 publications

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“…In fact, an alternative technique to 3D-DIC combining 2D-DIC and FP was investigated by previous researchers [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], but they were usually limited to static testing, a specific size of specimens or presented some errors in the measurement. Nonetheless, the authors of this work proposed a new integration methodology to measure large 3D shapes and displacements in solids [ 39 , 40 ]. This improved methodology overcame the independent restrictions presented by 2D-DIC and FP.…”

Section: Introductionmentioning

confidence: 99%

“…The developed method employs a CCD camera with conventional lenses and a post-processing correction of the in-plane displacements due to their distortion resulting from the out-of-plane displacements or the shape of the specimen. The adopted experimental set-up is simple but requires precise alignment and calibration to obtain the fringe constant and other parameters required for the in-plane correction [ 40 ]. Additionally, images to be processed employing FP require a clear fringe pattern to operate adequately.…”

Section: Introductionmentioning

confidence: 99%

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RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of Fringe Projection and Digital Image Correlation

Felipe-Sesé

Molina-Viedma

López‐Alba

et al. 2018

Sensors

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Three-dimensional digital image correlation (3D-DIC) has become the most popular full-field optical technique for measuring 3D shapes and displacements in experimental mechanics. The integration of fringe projection (FP) and two-dimensional digital image correlation (FP + DIC) has been recently established as an intelligent low-cost alternative to 3D-DIC, overcoming the drawbacks of a stereoscopic system. Its experimentation is based on the colour encoding of the characterized fringe and speckle patterns required for FP and DIC implementation, respectively. In the present work, innovations in experimentation using FP + DIC for more accurate results are presented. Specifically, they are based on the improvement of the colour pattern encoding. To achieve this, in this work, a multisensor camera and/or laser structural illumination were employed. Both alternatives are analysed and evaluated. Results show that improvements both in three-dimensional and in-plane displacement are obtained with the proposed alternatives. Nonetheless, multisensor high-speed cameras are uncommon, and laser structural illumination is established as an important improvement when low uncertainty is required for 2D-displacement measurement. Hence, the uncertainty has been demonstrated to be reduced by up to 50% compared with results obtained in previous experimental approaches of FP + DIC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of Fringe Projection and Digital Image Correlation

Felipe-Sesé

Molina-Viedma

López‐Alba

et al. 2018

Sensors

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“…Nevertheless, this paper presents a novel procedure to encode the full experimentation in a single strain map (based on Tchebichef shape descriptors [ 19 ]). This procedure decreases the dimensionality of the comparison process compared to some previous work [ 2 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Validation Approach for Quasistatic Numerical/Experimental Indentation Analysis in Soft Materials Using 3D Digital Image Correlation

et al. 2017

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A quasistatic indentation numerical analysis in a round section specimen made of soft material has been performed and validated with a full field experimental technique, i.e., Digital Image Correlation 3D. The contact experiment specifically consisted of loading a 25 mm diameter rubber cylinder of up to a 5 mm indentation and then unloading. Experimental strains fields measured at the surface of the specimen during the experiment were compared with those obtained by performing two numerical analyses employing two different hyperplastic material models. The comparison was performed using an Image Decomposition new methodology that makes a direct comparison of full-field data independently of their scale or orientation possible. Numerical results show a good level of agreement with those measured during the experiments. However, since image decomposition allows for the differences to be quantified, it was observed that one of the adopted material models reproduces lower differences compared to experimental results.

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“…Thus, for accurate full field measurement of the specimen deformation it is required an experimental technique that accounts for both in-plane and out-of-plane displacements simultaneously. Two experimental techniques that allow performing this kind of measurements are 3D-DIC [5] and now, the combination of FP and 2D-DIC also satisfy this requirement [4,6,7].…”

Section: Technique Fp + 2d Dicmentioning

confidence: 99%

“…In addition, FP requires the fringe constant, KFP, that relates the amount of phase shifting, Δφ, produced by the fringe displacement due to the zdisplacement . All these parameters can be obtained following a calibration process [7]. …”

Section: Technique Fp + 2d Dicmentioning

confidence: 99%

Dynamic Displacements Measurement Employing Fringe Projection and Digital Image Correlation

Felipe-Sesé

Molina-Viedma

López‐Alba

et al. 2018

The 18th International Conference on Experimental Mechanics

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A combination of Fringe Projection (FP) and 2D Digital Image Correlation (2D DIC) using a single camera has been employed to simultaneously measure in-plane and out-of-plane displacements during different dynamic events such an impact and a vibration analysis. This approach has been adopted in the past by several authors, including Mares et al. who highlighted that if a telecentric lens are not employed the combination of both techniques is not straightforward since the in-plane displacements measured with 2D DIC are sensitive to the out-of-plane displacements. Thus, in-plane displacements measured using 2D DIC should be corrected using the out-of-plane displacements inferred using the FP technique. In the current work, an easy method for in-plane displacement correction using Fringe Projection is adopted when measuring the 3D displacements during an impact on an aluminum plate and the vibration of a composite component which have not been studied by other authors previously.

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Integrating fringe projection and digital image correlation for high-quality measurements of shape changes

Cited by 24 publications

References 11 publications

RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of Fringe Projection and Digital Image Correlation

RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of Fringe Projection and Digital Image Correlation

A Validation Approach for Quasistatic Numerical/Experimental Indentation Analysis in Soft Materials Using 3D Digital Image Correlation

Dynamic Displacements Measurement Employing Fringe Projection and Digital Image Correlation

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