CAD-based calibration and shape measurement with stereoDIC

Beaubier, B.; Dufour, John-Eric; Hild, François; Roux, Stéphane; Lavernhe, Sylvain; Lavernhe-Taillard, Karine

doi:10.1007/s11340-013-9794-6

Cited by 57 publications

(44 citation statements)

References 23 publications

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“…An Integrated-SC algorithm [31] allows for the determination of the projection matrices by using a pseudokinematic basis. By working in the parametric space, it enables for dealing with two images of different resolutions and definitions.…”

Section: Projection Matricesmentioning

confidence: 99%

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Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

et al. 2016

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3D kinematic fields are measured using an original stereovision system composed of one infrared (IR) and one visible light camera. Global stereocorrelation (SC) is proposed to register pictures shot by both imaging systems. The stereo rig is calibrated by using a NURBS representation of the 3D target. The projection matrices are determined by an integrated approach. The effect of gray level and distortion corrections is assessed on the projection matrices. SC is performed once the matrices are calibrated to measure 3D displacements. Amplitudes varying from 0 to 800 µm are well captured for in-plane and out-ofplane motions. It is shown that when known rigid body translations are applied to the target, the calibration can be improved when its actual metrology is approximate. Applications are shown for two different setups for which the resolution of the IR camera has been modified.

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Section: Projection Matricesmentioning

confidence: 99%

“…In Ref. [31] it was shown that the 3D reconstruction can be performed on large industrial parts using the CAD model of the observed roof. Similarly, the projection matrices are estimated herein thanks to the 3D model of an open book target.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

et al. 2016

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“…Moreover, tight connections are to be established between the geometry of the model and the actual shape. To this aim, specific strategies based on CAD models have been proposed for stereocorrelation [66,67]. This allows all projected views (for each camera) to be related to a unique 3D model that becomes the reference, in contrast to classical 3D-DIC procedures [2].…”

Section: High-throughput Experimental Mechanicsmentioning

confidence: 99%

Big Data in Experimental Mechanics and Model Order Reduction: Today’s Challenges and Tomorrow’s Opportunities

Neggers

Allix

Hild

et al. 2017

Arch Computat Methods Eng

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Since the turn of the century experimental solid mechanics has undergone major changes with the generalized use of images. The number of acquired data has literally exploded and one of today's challenges is related to the saturation of mining procedures through such big data sets. With respect to Digital Image/Volume Correlation one of tomorrow's pathways is to better control and master this data flow with procedures that are optimized for extracting the sought information with minimum uncertainties and maximum robustness. In this paper emphasis is put on various hierarchical identification procedures. Based on such structures a posteriori model/data reductions are performed in order to ease and make the exploitation of the experimental information far more efficient. Some possibilities related to other Model Order Reduction techniques like the Proper Generalized Decomposition are discussed and new opportunities are sketched.

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“…A finite element analysis of such experiment predicts the largest strain variations during loading to be in the out-of-plane direction, resulting in out of plane displacements of several micrometers [6]. In experimental mechanics stereocorrelation (SC) is commonly used in order to measure such displacement fields [7][8][9][10][11]. In the present study, it is proposed to perform SC by using an original hybrid combination of one IR and one visible light camera.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Stereocorrelation for 3D Thermomechanical Field Measurements

Charbal

Dufour

Hild

et al. 2016

Advancement of Optical Methods in Experimental Mechanics, Volume 3

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Three dimensional displacement fields are measured thanks to an original stereo system made of InfraRed (IR) and visible light cameras. This configuration provides the thermal fields which drive the thermomechanical loading and the 3D surface displacement fields, i.e. the response of the studied material. The calibration of the stereo rig is performed by using a 3D target of known geometry and the large gray level variations that occur on the IR images are accounted for by applying a low-pass filter. Because of a slight disorientation of the target, a further calibration correction step revealed necessary. After correction of the target orientation, the measured displacement fields display a good qualitative agreement (no quantitative comparison has been performed yet) with the expected fields.

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CAD-based calibration and shape measurement with stereoDIC

Cited by 57 publications

References 23 publications

Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

Hybrid Stereocorrelation Using Infrared and Visible Light Cameras

Big Data in Experimental Mechanics and Model Order Reduction: Today’s Challenges and Tomorrow’s Opportunities

Hybrid Stereocorrelation for 3D Thermomechanical Field Measurements

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