Multi-camera based full-field 3D displacement measurement using digital image correlation

Hu, Tianci; Ma, Lei; Jiang, Dong; Fei, Qingguo

doi:10.1109/iscid51228.2020.00043

Cited by 3 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiple systems are preliminarily matched by tracking the motion trajectory of the calibration block [ 20 ]. Fine matching between systems is then carried out using the same speckle information in the overlapping fields of view [ 21 ]. The global coordinate system is unified after completing the fine matching.…”

Section: Introductionmentioning

confidence: 99%

Study on the Compressive Properties of an Elastomeric Porous Cylinder Using 360° Three-Dimensional Digital Image Correlation System

Sun

Zhao

et al. 2023

Materials

View full text Add to dashboard Cite

To study the compressive properties of an elastomeric porous cylinder, a 360° 3D digital image correlation (DIC) system is proposed. This compact vibration isolation table system captures different segments of the object from four different angles and fields of view, enabling a comprehensive measurement of the full surface of the object. To increase the stitching quality, a coarse–fine coordinate matching method is presented. First, a three-dimensional rigid body calibration auxiliary block is employed to track motion trajectory, which enables preliminary matching of four 3D DIC sub-systems. Subsequently, scattered speckle information characteristics guide fine matching. The accuracy of the 360° 3D DIC system is verified through a three-dimensional shape measurement conducted on a cylindrical shell, and the maximum relative error of the shell’s diameter is 0.52%. A thorough investigation of the 3D compressive displacements and strains exerted on the full surface of an elastomeric porous cylinder are investigated. The results demonstrate the robustness of the proposed 360° measuring system on calculating images with voids and indicate a negative Poisson’s ratio of periodically cylindrical porous structures.

show abstract

Section: Introductionmentioning

confidence: 99%