Researching | Multi-Viewpoint and High-Precision Measurement Method for Spatial Structure Deformation

Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1912004(2022)

Multi-Viewpoint and High-Precision Measurement Method for Spatial Structure Deformation

Shuotao Hu¹, Hui Sun², Mincheng Wang¹, Ke Wang², and Linghui Yang^1、*

Author Affiliations

¹State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China

²Shanghai Institute of Spacecraft Equipment, Shanghai 200240, China

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Figures&Tables (13)

References (17)

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Figures & Tables(13)

Fig. 1. Measurement principle of the 3D-DIC

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Fig. 2. Iteration process of the IC-GN matching algorithm

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Fig. 3. Structure of multi-view deformation measurement system

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Fig. 4. Principle of multi-view deformation measurement system

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Fig. 5. Extraction of subpixel ellipses. (a) Initial center and high-precision center; (b) subpixel edge points

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Fig. 6. Error model of the system

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Fig. 7. Experimental system of the 3D-DIC. (a) Displacement; (b) angle

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Fig. 8. Measurement results of displacement and rotation. (a) Displacement; (b) angle

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Fig. 9. Physical map of multi-view deformation measurement experiment

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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 ℃

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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

Table 1. Transformation parameters and transformation errors

Key position	T_x /mm	T_y /mm	T_z /mm	$R_{x} / ($ ° $)$	$R_{y} / ($ ° $)$	$R_{z} / ($ ° $)$	Error /mm
AOI 1	853.45	122.04	95.45	0.7423	0.2386	0.8442	0.05
AOI 2	-64.57	796.52	93.66	2.8951	-0.7540	1.5310	0.06
AOI 3	-847.97	-44.75	102.02	-0.5663	-0.0053	1.0621	0.05
AOI 4	52.04	-835.25	92.17	0.7784	0.5603	0.8100	0.04

Table 2. Measurement error estimation of displacement in sub-regions
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Table 2. Measurement error estimation of displacement in sub-regions
Key position 3D-DIC measurement error /μm Angle between planes / $($ ° $)$ Cosine error /（μm·m^-1）
AOI 1 0.88 0.06 0.62
AOI 2 0.74 0.08 1.07
AOI 3 0.96 0.05 0.45
AOI 4 0.94 0.06 0.48

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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

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Sep. 28, 2021

Accepted: Oct. 25, 2021

Published Online: Sep. 23, 2022

The Author Email: Yang Linghui (yanglh.tju@gmail.com)

DOI:10.3788/LOP202259.1912004

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology