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Published byDalila Bardini Modified over 5 years ago
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The high precision photogrammetry application R&D in CEPC
BEIJING PRODETEC TECHNOLOGY CO.,LTD Fan shenghong 北京普达迪泰科技有限公司 范生宏 大家好我是加速器中心的朱洪岩
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Company introduction BEIJING PRODETEC TECHNOLOGY are committed to providing non-contact precise measurement products and solutions for customers in the military industry and advanced manufacturing fields, and providing technical and product support for the design, simulation, quality control and movement status of users’ products. Development of software and hardware for precision measurement system Image stabilization, tracking system customization and integration Customization and integration of video image real-time mosaic system Basic research technology cooperation Measurement cloud system
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Company introduction BEIJING PRODETEC TECHNOLOGY are committed to providing non-contact precise measurement products and solutions for customers in the military industry and advances manufacturing fields, and providing technical and product support for the design, simulation, quality control and movement status of users’ products. Development of software and hardware for precision measurement system Image stabilization, tracking system customization and integration Customization and integration of video image real-time mosaic system Basic research technology cooperation Industrial measuring camera IDPMS software
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Company introduction BEIJING PRODETEC TECHNOLOGY are committed to providing non-contact precise measurement products and solutions for customers in the military industry and advances manufacturing fields, and providing technical and product support for the design, simulation, quality control and movement status of users’ products. Development of software and hardware for precision measurement system Image stabilization, tracking system customization and integration Customization and integration of video image real-time mosaic system Basic research technology cooperation Five-hundred-meter Aperture Spherical radio Telescope (FAST)
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CEPC
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Challenge: Problem: Photogrammetry: CEPC - Challenge
Precision requirement Provide by physics group Unit: mm,mrad Component Transversal Vertical Longitudinal Pitch Yaw Roll Dipole 0.1 0.15 0.2 Quadrupole Sextupole Corrector Budget Fiducialization Control network Measurement Adjustment Totall Precision 0.05~0.1 0.12 0.05 0.15~0.2 By Courtesy of Dr.Wang Xiaolong Problem: Tunnel: long and narrow space Not conventional photogrammetric circumstance No Level orientation function. Huge number of photos …… Photogrammetry: High Efficiency Promising Precision Noncontact Flexible
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Photogrammetry research
Precision camera development Million capacity coding Sparse matrix adjustment research Tunnel simulation CSNS tunnel experiment Magnet Fiducialization The most interested part is cryogenic alignment, it will cover the sensor I designed and the whole cryostat alignment process,
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CEPC - Photogrammetry research
1. Precision camera development: Product information Resolution 6576*4384 Pixel 5um Precision 3um+3um/m Attachment Scalar, Coded target Software IDPMS Camera Size 233mm*153mm*161mm
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CEPC - Photogrammetry research
2. Million capacity coding: Decoding algorithm Target extraction Cross ratio invariance Model point extraction Affine transformation Recover code structure Coded value Hundreds capacity Million capacity Recognition rate Extraction precision 97% 0.05
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CEPC - Photogrammetry research
3. Sparse matrix adjustment research: Image points extracted by 55 position No Points number 1 436 15 29 435 43 433 2 16 434 30 44 3 415 17 31 45 4 18 429 32 46 430 5 19 33 437 47 424 6 20 34 48 7 21 35 49 8 22 36 50 9 23 37 51 10 432 24 38 52 11 431 25 39 53 12 426 26 40 421 54 13 163 27 41 55 14 28 42
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CEPC - Photogrammetry research
3. Sparse matrix adjustment research: Algorithm computation time(ACT)/ms Matrix inversion time(MIT)/ms Photo Num 8 17 24 36 48 55 Number of formula 6392*1356 14190*1413 20274*1455 30728*1527 41086*1599 47162*1641 ACT of Traditional 134814 311833 528981 ACT of New 4 7 10 26 30 Efficiency 3.37E+04 4.45E+04 5.29E+04 9.82E+04 1.17E+05 1.31E+05 MIT of Traditional 1529 1654 1841 2090 2371 2605 MIT of New 38 41 76 169 291 389 40.2 40.3 24.2 12.3 8.1 6.7 Total efficiency 3.25E+03 6.53E+03 6.17E+03 8.99E+03 9.60E+03 9.37E+03
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CEPC - Photogrammetry research
3. Sparse matrix adjustment research: Algorithm computation time(ACT)/ms Matrix inversion time(MIT)/ms
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CEPC - Photogrammetry research
4.Tunnel simulation: Experiment set up: Space:14m×7m×2m 6 pillars→3×2 7m interval Compare with Laser tracker measurement Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21 Problem: Not enough common points to match image stations 3 2 1 4 5 6
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CEPC - Photogrammetry research
4.Tunnel simulation: Experiment set up: Space:14m×2m single wall 5 pillars 3.5m interval Compare with Laser tracker measurement Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21 3 0.59 0.20 0.30 0.69 4 0.57 0.21 0.84 Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21
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CEPC - Photogrammetry research
4.Tunnel simulation: Experiment set up: Space:14m×7m single wall 9 pillars 1.75m interval Compare with Laser tracker measurement Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21 3 0.59 0.20 0.30 0.69 4 0.57 0.21 0.84 Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21 Precision X Y Z Total 1 0.83 0.37 0.43 1.01 2 1.06 0.38 0.44 1.21 3 0.59 0.20 0.30 0.69 4 0.57 0.21 0.84 5 0.28 0.12 Conclusion: Target density influence precision a lot. The effective angle of traditional retro-reflective target is 0-45° Not measurable from both sides of the tunnel 3D Target
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CEPC - Photogrammetry research
5. CSNS tunnel experiment: Strategy: Local magnet measurement Long range control measurement 3D coded targets working as control network Visual range 20m Connect local magnet station Local magnet measurement Long range control measurement 3D coded targets
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CEPC - Photogrammetry research
5. CSNS tunnel experiment: Experiment Setup: ¼ RCS tunnel: 70m×4m×2m Original RCS control network points 10 magnets Compare with laser tracker measurement X Y Z Total 1 0.226 0.282 0.214 0.420 2 0.288 0.266 0.209 0.445 3 0.333 0.220 0.189 0.442 4 0.173 0.271 0.187 0.372 5 0.259 0.256 0.181 0.407 6 0.204 0.205 0.185 0.343
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CEPC - Photogrammetry research
5. CSNS tunnel experiment: Local measurement repeatability Precision of hemisphere target X Y Z Total R2MB02 0.011 0.019 0.015 0.027 R2QD02 0.016 0.018 0.008 0.026 X Y Z Total R2MB02 0.162 0.097 0.032 0.192 R2QD02 0.212 0.124 0.054 0.251 Conclusion: Need more precise , large visual angle target. Need long precise reference to minimize the error accumulation.
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CEPC - Photogrammetry research
Targets on Polar Targets on Plane 5. Magnet Fiducialization: Fiducialize with Laser tracker first Photogrammetric measurement Laser tracker Photogrammetry Error 272QCF1 753.24 349.68 0.03 0.00 0.01 272QCF2 753.41 753.44 -0.02 -0.03 272QCF3 597.94 753.30 598.00 753.36 -0.06 -0.05 272QCF4 397.38 753.12 349.69 397.44 753.09 349.75
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CEPC - Photogrammetry research
Future Tunnel survey can reach 0.4mm precision, it is very promising Sparse matrix adjustment research Real time processing
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Thanks for your attention
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