The Combination of Speckle Correlation and Fringe Projection for the Measurement of Dynamic 3-D Deformations of Airbag Caps

Weber, Herbert; Lichtenberger, Ralf; Wolf, Thomas

doi:10.1007/0-306-46948-0_63

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Others authors employed a combination of Fringe-Projection and 2D-digital image correlation as a low-cost alternative to 3D-DIC using a single CCD camera and a fringe projector. Previous studies [10][11][12][13][14][15][16][17][18][19] adopted similar approach; however, as highlighted by [10], if a telecentric lens is not employed, the combination of both techniques is not a straightforward, since 2D-DIC results are sensitive to the out-of-plane displacements experienced by a non-planar object during deformation [15]. In addition, speckle and fringe patterns should be present on the specimen surface simultaneously in order to perform dynamic tests.…”

Section: Measurement Science and Technologymentioning

confidence: 99%

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

López‐Alba

Felipe-Sesé

Schmeer

et al. 2016

Meas. Sci. Technol.

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In the current paper, an optical low-cost system for 3D displacement measurement based on a single camera and 3D digital image correlation is presented. The conventional 3D-DIC set-up based on a two-synchronized-cameras system is compared with a proposed pseudo-stereo portable system that employs a mirror system integrated in a device for a straightforward application achieving a novel handle and flexible device for its use in many scenarios. The proposed optical system splits the image by the camera into two stereo images of the object. In order to validate this new approach and quantify its uncertainty compared to traditional 3D-DIC systems, solid rigid in and out-of-plane displacements experiments have been performed and analyzed. The differences between both systems have been studied employing an image decomposition technique which performs a full image comparison. Therefore, results of all field of view are compared with those using a stereoscopy system and 3D-DIC, discussing the accurate results obtained with the proposed device not having influence any distortion or aberration produced by the mirrors. Finally, the adaptability of the proposed system and its accuracy has been tested performing quasi-static and dynamic experiments using a silicon specimen under high deformation. Results have been compared and validated with those obtained from a conventional stereoscopy system showing an excellent level of agreement.

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Section: Measurement Science and Technologymentioning

confidence: 99%

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

López‐Alba

Felipe-Sesé

Schmeer

et al. 2016

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Weber et al 3 presented a method using two projectors and two cameras equipped with color filters to separately capture fringe patterns and speckle patterns that are simultaneously present on the object surface. The fringe projection technique is then applied to estimate surface profile and out-of-plane displacements, and 2-D DIC is used to determine in-plane displacements.…”

Section: Introductionmentioning

confidence: 99%

Shape and displacement measurement of discontinuous surfaces by combining fringe projection and digital image correlation

et al. 2011

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We describe how a shape-measurement system (SMS) based on fringe projection can be combined with a two-dimensional digital image correlation (DIC) technique to accurately measure both surface profile and displacement fields at the same time. Whereas the measurement of all three displacement components by traditional DIC requires the use of at least two cameras, the approach presented here provides the full three-dimensional (3-D) displacement field from a single-camera, singleprojector SMS with no additional hardware requirements. Furthermore, the single-pixel spatial resolution of the fringe projection technique can be exploited to prevent the correlation peak-splitting phenomenon that occurs when a DIC subimage straddles a global geometrical discontinuity. Thus, unlike traditional 3-D DIC techniques, the proposed method can measure displacement fields on discontinuous surfaces as easily as on smooth ones. Details of the algorithm are given together with experimental results of a rigid-body translation test. Measurements made during a routine fatigue test on a part of a wing panel are also presented. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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“…Although fringe projection and DIC sensors are available separately from commercial vendors, the common hardware requirements for the two techniques suggest that combining the two on a common platform is a logical direction of development, with benefits to include lower overall system cost and greater ease of use for the end‐users of the technology. A few authors [5–8] have previously described set‐ups combining fringe projection and DIC and presented results for smooth surfaces and from a single view.…”

Section: Introductionmentioning

confidence: 99%

Multiple‐view Shape and Deformation Measurement by Combining Fringe Projection and Digital Image Correlation

Nguyen

Huntley

Burguete

et al. 2011

Strain

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We present a new method that combines the fringe projection and the digital image correlation (DIC) techniques on a single hardware platform to simultaneously measure both shape and deformation fields of three‐dimensional (3‐D) surfaces with complex geometries. The method in its basic form requires only a single camera and single projector, but this can be easily extended to a multi‐camera multi‐projector system to obtain complete 360° measurements. Multiple views of the surface profile and displacement field are automatically co‐registered in a unified global coordinate system, thereby avoiding the significant errors that can arise through the use of statistical point cloud stitching techniques. Experimental results from a two‐camera two‐projector sensor are presented and compared with results from both a standard stereo‐DIC approach and a finite element model.

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The Combination of Speckle Correlation and Fringe Projection for the Measurement of Dynamic 3-D Deformations of Airbag Caps

Cited by 5 publications

References 2 publications

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

Shape and displacement measurement of discontinuous surfaces by combining fringe projection and digital image correlation

Multiple‐view Shape and Deformation Measurement by Combining Fringe Projection and Digital Image Correlation

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