Researching | Full Runout Measurement of DD Motor End Face Based on Point Cloud Drive

Laser & Optoelectronics Progress, Volume. 60, Issue 12, 1215006(2023)

Full Runout Measurement of DD Motor End Face Based on Point Cloud Drive

Hu Zhou¹, Dengdeng Shu¹, Chongjun Wu^1,2、*, and Qibing Wang^2,3

Author Affiliations

¹College of Mechanical Engineering, Donghua University, Shanghai 201620, China

²Sicher Elevator Co., Ltd., Huzhou 313009, Zhejiang, China

³College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 200031, Zhejiang, China

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Figures&Tables (16)

References (16)

Paper Information

Figures & Tables(16)

Fig. 1. Point cloud of DD motor

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Fig. 2. Flow chart of proposed method

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Fig. 3. Experimental platform and collected point cloud

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Fig. 4. Schematic diagram of point cloud density

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Fig. 5. Flow chart of hybrid segmentation algorithm based on curvature and density

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Fig. 6. Anomaly analysis of point cloud. (a) Segmented working face point cloud; (b) point cloud line chart

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Fig. 7. Verification diagrams of normal distribution of point cloud. (a) Q-Q graph of point cloud; (b) frequency histogram

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Fig. 8. Point cloud compression results

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Fig. 9. Results of point cloud segmentation. (a) $c = 0.5, k = 25$ ; (b) $c = 1.0, k = 50$ ;（c） $c = 1.5, k = 75$ ；（d） $c = 2.0, k = 100$

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Fig. 10. Point cloud after outlier elimination and corresponding line chart. (a) Point cloud after outlier elimination; (b) point cloud line chart

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Fig. 11. Measurement result

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Fig. 12. Schematic diagram of dial indicator measurement

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Table 1. Parameters of linear laser sensor
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Table 1. Parameters of linear laser sensor
Points of a single contour Near field /mm Far view /mm Measuring range /mm Z-axis resolution / $μ m$ Z-axis repeatability / $μ m$ Scanning frequency /Hz
2048 25.2 34.4 0-25 1.8-3.0 0.4 700

Table 2. Comparison of RANSAC fitting results under different parameters

Table 2. Comparison of RANSAC fitting results under different parameters

Parameter	a	b	c	d	Fitting error / $μ m$
$t = 1, k = 50$	-0.000006	-0.000002	1.00000	-723.209167	11.15
$t = 5, k = 50$	-0.000157	0.000012	1.00000	-723.292297	11.98
$t = 10, k = 100$	0.000017	0.000016	1.00000	-721.357910	10.52
$t = 15, k = 100$	0.000049	0.000018	1.00000	-720.957520	11.32

Table 3. Measurement data of left end of bolt hole
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Table 3. Measurement data of left end of bolt hole
Order 1 2 3 4 5 6 7 8 9 10 11 12
Minimum 2269 2254 2244 2219 2201 2155 2127 1754 1694 2531 2483 2389
Maximum 2278 2268 2254 2228 2211 2170 2135 1763 1698 2539 2491 2399
End runout 9 14 10 9 10 15 8 9 4 8 8 10

Table 4. Measurement data of right end of bolt hole
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Table 4. Measurement data of right end of bolt hole
Order 13 14 15 16 17 18 19 20 21 22 23 24
Minimum 1816 1792 1784 1756 1762 1759 1754 1747 1734 1726 1754 1736
Maximum 1828 1802 1792 1766 1769 1772 1768 1762 1743 1741 1764 1745
End runout 12 10 8 10 7 13 14 15 9 15 10 11

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Hu Zhou, Dengdeng Shu, Chongjun Wu, Qibing Wang. Full Runout Measurement of DD Motor End Face Based on Point Cloud Drive[J]. Laser & Optoelectronics Progress, 2023, 60(12): 1215006

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Paper Information

Category: Machine Vision

Received: May. 16, 2022

Accepted: Jul. 4, 2022

Published Online: Jun. 5, 2023

The Author Email: Chongjun Wu (wcjunm@dhu.edu.cn)

DOI:10.3788/LOP221608

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology