Cross-Scale Part Measurement Method Based on Macro-Micro Composite Calibration

Fig. 6. Results of 3D reconstruction of the surface of the hole array. (a) Single injection hole; (b) two of the injection hole stitching results; (c) all injection hole stitching results

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Fig. 7. Surface structured light sensor measurement system

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Fig. 8. Measured results of the surface structured light scanner. (a) Overall topography; (b) local details; (c) local details of the methods in this paper

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Table 1. Macro-micro composite calibration block feature point coordinates

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Table 1. Macro-micro composite calibration block feature point coordinates

Feature point ordinal number	Macro feature point coordinates			Micro feature point coordinates
Feature point ordinal number	X /mm	Y /mm	Z /mm	X /mm	Y /mm	Z /mm
1	15.00	75.00	15.00	97.50	90.00	17.25
2	35.00	75.00	15.00	97.75	89.50	17.75
3	55.00	75.00	15.00	98.25	89.50	17.75
4	75.00	75.00	15.00	98.75	90.00	17.25
5	22.00	55.00	15.00	97.50	90.00	18.75
6	41.00	60.00	15.00	97.75	89.50	18.25
7	59.00	58.00	15.00	98.25	89.50	18.25
8	80.00	57.00	15.00	98.75	90.00	18.75
9	12.00	33.00	15.00
10	37.00	39.00	15.00
11	58.00	38.00	15.00
12	85.00	34.00	15.00
13	16.00	15.00	15.00
14	38.00	13.00	15.00
15	60.00	20.00	15.00
16	83.00	14.00	15.00

Table 2. Coordinates of reconstructed feature points

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Table 2. Coordinates of reconstructed feature points

Feature point ordinal number	Binocular reconstruction feature point coordinates			Microscopic reconstruction of feature point coordinates
Feature point ordinal number	X /mm	Y /mm	Z /mm	X /mm	Y /mm	Z /mm
1	136.2400	49.4583	884.6810	1.884630	0.224976	0.778578
2	69.0741	72.2868	895.9190	1.386740	0.721029	0.275622
3	73.0661	90.2391	896.9160	0.877775	0.725782	0.278612
4	93.7492	66.7816	892.1950	0.372501	0.223132	0.760484
5	94.8173	92.4349	894.5430	1.884630	1.720230	0.778208
6	116.5680	85.7307	891.0920	1.383050	1.220770	0.269939
7	139.1480	92.2189	888.6500	0.881043	1.221410	0.270268
8	141.1480	72.2797	886.4800	0.373877	1.722360	0.760037
9	147.037	-269.241	774.246
10	176.014	-255.086	777.466
11	209.365	-148.475	787.507

Table 3. Pose of the local area (partial)

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Table 3. Pose of the local area (partial)

Region	Pose result
Global control points	$T_{P_{1}}^{S_{1}} = [\begin{matrix} 0.985852 & - 0.151912 & - 0.070844 & 327.059 \\ 0.011303 & 0.481935 & - 0.876134 & 798.299 \\ - 0.167238 & - 0.862938 & - 0.476834 & 1593.85 \\ 0 & 0 & 0 & 1 \end{matrix}]$
	$T_{P_{2}}^{S_{2}} = [\begin{matrix} 0.98687 & 0.151354 & 0.056389 & 85.7012 \\ 0.331495 & 0.331495 & - 0.943452 & 922.521 \\ - 0.161488 & 0.931237 & 0.326679 & 104.817 \\ 0 & 0 & 0 & 1 \end{matrix}]$
	$T_{P_{3}}^{S_{3}} = [\begin{matrix} 0.98475 & - 0.154733 & - 0.079527 & 338.249 \\ 0.006711 & 0.490567 & - 0.871378 & 789.278 \\ - 0.173844 & - 0.857556 & - 0.484124 & 1601.65 \\ 0 & 0 & 0 & 1 \end{matrix}]$
Local point cloud data	$T_{W_{1}}^{S_{1}} = [\begin{matrix} 0.752369 & - 0.658531 & 0.0166652 & 0.027426 \\ - 0.154450 & - 0.151752 & 0.976277 & - 736.992701 \\ - 0.640380 & - 0.737095 & - 0.215883 & - 66.066501 \\ 0 & 0 & 0 & 1 \end{matrix}]$
	$T_{W_{2}}^{S_{2}} = [\begin{matrix} 0.652151 & 0.424620 & 0.494517 & - 890.020364 \\ - 0.454279 & - 0.625901 & 0.765582 & - 344.944755 \\ - 0.691526 & 0.654175 & 0.411507 & - 1225.815691 \\ 0 & 0 & 0 & 1 \end{matrix}]$
	$T_{W_{3}}^{S_{3}} = [\begin{matrix} 0.750058 & - 0.661356 & 0.004661 & 15.740639 \\ - 0.147920 & - 0.160883 & 0.975826 & - 733.229084 \\ - 0.644618 & - 0.732616 & - 0.218499 & - 63.543655 \\ 0 & 0 & 0 & 1 \end{matrix}]$

Table 4. Measured and theoretical values of the center coordinates of the hole surface, as well as the error between them

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Table 4. Measured and theoretical values of the center coordinates of the hole surface, as well as the error between them

Hole serial number	The coordinates of the center of the hole surface			Theoretical value		Error
1	0.0001	-8.0218	0.0081	0.0000	-8.0000	0.0233
2	-3.9964	-6.9495	0.0118	-4.0000	-6.9282	0.0247
3	-6.9295	-4.0271	0.0055	-6.9282	-4.0000	0.0277
4	-7.9997	0.0231	0.0051	-8.0000	0.0000	0.0237
5	-6.9233	3.9976	0.0224	-6.9282	4.0000	0.0230
6	-3.9976	6.9063	0.0261	-4.0000	6.9282	0.0288
7	-0.0001	7.9780	0.0009	0.0000	8.0000	0.0219
8	4.0005	6.9066	0.0023	4.0000	6.9282	0.0118
9	6.9282	3.9768	0.0093	6.9282	4.0000	0.0249
10	8.0003	-0.0238	0.0108	8.0000	0.0000	0.0262
11	6.9281	-4.0261	0.0113	6.9282	-4.0000	0.0285
12	4.0051	-6.9050	0.0056	4.0000	-6.9282	0.0243

Table 5. Measured and theoretical values of the axial direction of the hole, as well as the error between them

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Table 5. Measured and theoretical values of the axial direction of the hole, as well as the error between them

Hole serial number	Hole axis direction vector	Theoretical value	Error /（°）
1	（0.0001，-8.0218，13.8645）	（0.0000，-8.0000，13.8564）	0.0530
2	（-3.9964，-6.9495，13.8682）	（-4.0000，-6.9282，13.8564）	0.0579
3	（-6.9295，-4.0271，13.8619）	（-6.9282，-4.0000，13.8564）	0.0891
4	（-7.9997，0.0231，13.8615）	（-8.0000，0.0000，13.8564）	0.0833
5	（-6.9233，3.9976，13.8788）	（-6.9282，4.0000，13.8564）	0.0569
6	（-3.9976，6.9063，13.8825）	（-4.0000，6.9282，13.8564）	0.1137
7	（-0.0001，7.9780，13.8573）	（0.0000，8.0000，13.8564）	0.0699
8	（4.0005，6.9066，13.8587）	（4.0000，6.9282，13.8564）	0.0744
9	（6.9282，3.9768，13.8657）	（6.9282，4.0000，13.8564）	0.0891
10	（8.0003，-0.0238，13.8672）	（8.0000，0.0000，13.8564）	0.0871
11	（6.9281，-4.0261，13.8677）	（6.9282，-4.0000，13.8564）	0.0835
12	（4.0051，-6.9050，13.8620）	（4.0000，-6.9282，13.8564）	0.0863

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Rui Song, Yihua Zhang, Haihua Cui. Cross-Scale Part Measurement Method Based on Macro-Micro Composite Calibration[J]. Acta Optica Sinica, 2024, 44(6): 0612001

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Jun. 25, 2023

Accepted: Aug. 2, 2023

Published Online: Mar. 20, 2024

The Author Email: Cui Haihua (cuihh@nuaa.edu.cn)

DOI:10.3788/AOS231175

CSTR:32393.14.AOS231175

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology