Shuotao Hu, Hui Sun, Mincheng Wang, Ke Wang, Linghui Yang. Multi-Viewpoint and High-Precision Measurement Method for Spatial Structure Deformation[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1912004
- Laser & Optoelectronics Progress
- Vol. 59, Issue 19, 1912004 (2022)
Fig. 1. Measurement principle of the 3D-DIC
Fig. 2. Iteration process of the IC-GN matching algorithm
Fig. 3. Structure of multi-view deformation measurement system
Fig. 4. Principle of multi-view deformation measurement system
Fig. 5. Extraction of subpixel ellipses. (a) Initial center and high-precision center; (b) subpixel edge points
Fig. 6. Error model of the system
Fig. 7. Experimental system of the 3D-DIC. (a) Displacement; (b) angle
Fig. 8. Measurement results of displacement and rotation. (a) Displacement; (b) angle
Fig. 9. Physical map of multi-view deformation measurement experiment
Fig. 10. Local displacement field at different temperature. (a) 27.37 ℃; (b) 31.58 ℃; (c) 36.14 ℃; (d) 41.21 ℃; (e) 45.50 ℃; (f) 47.79 ℃
Fig. 11. Displacement field at different temperature. (a) 27.37 ℃; (b) 31.58 ℃; (c) 36.14 ℃; (d) 41.21 ℃; (e) 45.50 ℃; (f) 47.79 ℃
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Table 1. Transformation parameters and transformation errors
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Table 2. Measurement error estimation of displacement in sub-regions
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