Optics and Precision Engineering, Volume. 32, Issue 1, 95(2024)
Accurate measurement of end position of inclined pipe with optimal projection plane of space
Figures & Tables(35)
Fig. 2. Three-dimensional morphological description of oblique mouth tube
Table 1. Camera interior index
View tableView in ArticleTable 1. Camera interior index
相机 f/pixel x0/pixel y0/pixel K1 K2 K3 B1 B2 E1 E2 Sigma 1 1 682.71 -23.25 30.67 -6.11×10-8 8.511×10-15 1.52×10-21 -2.401×10-8 -2.157×10-7 -9.004×10-5 0.000 105 5 0.026 2 1 676.72 -15.35 14.43 -5.95×10-8 5.12×10-15 4.99×10-21 1.99e-07 3.68×10-8 -1.94×10-5 2.43×10-5 0.025 3 1 678.94 -11.17 22.67 -6.28×10-8 1.24×10-14 -4.99×10-22 -8.16×10-8 -1.637×10-7 5.93×10-5 3.29×10-5 0.023 4 1 680.40 26.25 16.13 6.84×10-8 2.47×10-14 -9.19×10-21 2.25×10-8 -9.18×10-8 -2.03×10-5 8.27×10-5 0.022 5 1 680.22 8.86 48.10 -6.53×10-8 1.79×10-14 -5.81×10-21 1.66×10-7 -2.24×10-7 -3.87×10-5 7.74×10-5 0.029 6 1 682.75 19.07 42.42 -6.27×10-8 1.34×10-14 -1.19×10-7 1.99×10-7 -2.78×10-7 -7.59×10-6 1.83×10-5 0.028 7 1 678.31 30.18 27.36 -6.28×10-8 1.55×10-14 -3.21×10-21 6.39×10-8 -6.34×10-8 -1.01×10-4 -3.42×10-5 0.027 8 1 680.40 26.25 16.13 6.84×10-8 2.47×10-14 -9.19×10-21 2.25×10-8 -9.18×10-8 -2.03×10-5 8.27×10-5 0.030 9 1 677.79 32.23 45.69 -6.67×10-8 2.57×10-14 -1.31×10-21 1.96×10-7 -2.14×10-9 5.15×10-5 -4.70×10-5 0.028 10 1 675.88 -2.51 37.10 -6.43×10-8 1.09×10-14 2.59×10-21 -6.74×10-8 -1.28×10-7 9.89×10-5 -9.02×10-5 0.027
Table 2. Measurement results of Pipe 1
View tableView in ArticleTable 2. Measurement results of Pipe 1
摆放位置 端点距离
/mm
测量角度/（°） 端头1 端头2 1 711.117 2.602 38.882 2 711.068 2.588 39.156 3 711.155 2.572 39.183 4 711.062 2.652 40.781 5 711.048 2.486 39.167 6 711.148 2.572 39.189 7 711.053 2.557 39.103 8 711.066 2.612 39.083 9 711.064 2.573 39.092 10 711.158 2.575 39.132 平均值 711.093 2.578 39.276
Table 3. Measurement results of Pipe 2
View tableView in ArticleTable 3. Measurement results of Pipe 2
摆放位置 端点距离/mm 测量角度/（°） 端头1 端头2 1 211.712 28.763 117.612 2 211.714 28.786 117.596 3 211.719 28.775 117.587 4 211.721 28.753 117.623 5 211.715 28.762 117.605 6 211.711 28.783 117.588 7 211.739 28.866 117.576 8 211.720 28.793 117.624 9 211.718 28.854 117.532 10 211.721 28.831 117.609 平均值 211.720 28.797 117.595
Table 4. Measurement mean at different brightness levels
View tableView in ArticleTable 4. Measurement mean at different brightness levels
亮度 端点距离/mm 端头测量角度/（°） 均衡 0.05 0.1 过亮 1.5 1 过暗 1.3 1.1
Table 5. Point cloud measurement results of Pipe 1
View tableView in ArticleTable 5. Point cloud measurement results of Pipe 1
端点距离/mm 端头1测量角度/（°） 端头2测量
角度/（°）
711.007 2.575 39.189
Table 6. Point cloud measurement results of Pipe 2
View tableView in ArticleTable 6. Point cloud measurement results of Pipe 2
端点距离/mm 端头1测量
角度/（°）
端头2测量
角度/（°）
211.718 28.765 117.712
Table 7. Comparison of end-of-line distance measurement accuracy
View tableView in ArticleTable 7. Comparison of end-of-line distance measurement accuracy
测量方法 重复精度/mm 绝对精度/mm 本文算法 0.043 0.1 点云扫描测量 0. 026 ——
Table 8. Comparison of cutting angle measurement accuracy
View tableView in ArticleTable 8. Comparison of cutting angle measurement accuracy
测量方法 重复精度/（°） 绝对精度/（°） 本文算法 0.097 5 0.116 点云扫描测量 0.110 75 ——
Table 9. Comparison of measurement accuracy of different methods
View tableView in ArticleTable 9. Comparison of measurement accuracy of different methods
测量方法 距离重复精度/mm 距离绝对精度/mm 角度重复精度/（°） 角度绝对精度/（°） 测量时间/min 本文算法 0.05 0.17 0.1 0.23 1 点云扫描测量 0.08 0.2 0.15 0.25 5~10
Table 10. Comparison of different visual measurement methods
View tableView in ArticleTable 10. Comparison of different visual measurement methods
测量方法 端点距离最大绝对偏差/mm 端点测量角度最大绝对偏差/（°） 平均测量时间/min 文献［ 8 ］0.442 - 1.2 文献［ 14 ］0.136 - 1.1 本文方法 0.100 0.116 1.0
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Guowei SHANG, Jin LIANG, Leigang LI, Wenyan PAI, Guizhong ZHAO. Accurate measurement of end position of inclined pipe with optimal projection plane of space[J]. Optics and Precision Engineering, 2024, 32(1): 95
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Received: May. 24, 2023
Accepted: --
Published Online: Jan. 23, 2024
The Author Email: Jin LIANG (liangjin@mail.xjtu.edu.cn)
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