Real-time 3D Digital Image Correlation for Large Deformation and Rotation Measurements Based on a Deformation Transfer Scheme

Background With the recent increase in digital image correlation (DIC) applications, it is important to improve the computational efficiency of DIC and realize the closed loop control of systems. Objective A real-time three-dimensional (3D) DIC method for large deformation and rotation measurements...

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Veröffentlicht in:Experimental mechanics Jg. 61; H. 6; S. 951 - 967
Hauptverfasser: Shao, X.X., He, X.Y.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York Springer US 01.07.2021
Springer Nature B.V
Schlagworte:
Algorithms
Biomedical Engineering and Bioengineering
Characterization and Evaluation of Materials
Closed loops
Computational efficiency
Computing time
Control
Convergence
Deformation
Deformation analysis
Digital imaging
Dynamical Systems
Engineering
Interpolation
Lasers
Lookup tables
Matching
Optical Devices
Optics
Parallel processing
Photonics
Pixels
Real time
Research Paper
Rotation
Solid Mechanics
Special Collection on New Methods and Applications of Optical and Photo-Mechanics
Tensile deformation
Time measurement
Vibration
Deformation measurement
Large deformation and rotation
Three-dimensional
Digital image correlation
Real-time
ISSN:0014-4851, 1741-2765
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Zusammenfassung:Background With the recent increase in digital image correlation (DIC) applications, it is important to improve the computational efficiency of DIC and realize the closed loop control of systems. Objective A real-time three-dimensional (3D) DIC method for large deformation and rotation measurements is proposed in this paper. Methods To solve the problem of initial guess estimation under large deformation and rotation, the convergence radius of the inverse compositional Gauss-Newton (IC-GN) algorithm considering large rotation and deformation is analyzed. Then, a temporal-spatial deformation transfer scheme is proposed for efficient temporal and stereo matching in 3D-DIC. The highly efficient IC-GN algorithm with an improved interpolation look-up table is proposed to further improve the computational efficiency. The multipoint and full-field real-time 3D deformation measurements are performed by parallel CPU computation. Results The convergence radius of IC-GN are estimated to be below 3 pixels for rotation and below 5 pixels for tensile deformation. The accuracy of the initial guess estimation by deformation transfer is improved and can meet the requirements of large deformation and rotation measurements. Benefiting from the temporal-spatial deformation transfer scheme, the efficient IC-GN algorithm, the efficient temporal and stereo matching strategy and the parallel computation, real-time multipoint deformation measurements at 60 Hz with 50 points and full-field deformation measurements at 15 Hz with 5000 points are realized. Conclusions Real-time multipoint and full-field 3D deformation measurements for large deformations and rotations are realized. High-accuracy, real-time and fully automatic 3D deformation measurement sensors are expected.
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ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-021-00714-9