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Laser & Optoelectronics Progress, Volume. 62, Issue 9, 0912002(2025)

Dynamic Pitch Misalignment Angle Measurement System for Precision Centrifuges

Xin Liu1,2, Shanshan Wang1,2、*, Peihan Zhang3,4, Dong He3,4, Leilei Hao4, Yuxiang Qi5, and Qun Hao1,6
Author Affiliations
  • 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2National Key Laboratory on Near-Surface Detection, Beijing 100072, China
  • 3Laboratory of Science and Technology on Ultra-Precision Aerospace Control Instrument, Beijing 100039, China
  • 4Beijing Institute of Aerospace Control Devices, Beijing 100039, China
  • 5China Aerospace Academy of Electronics Technology, Beijing 100094, China
  • 6School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (19)
    Equations (7)
    References (17)
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    Figures & Tables(19)
    Schematic of dynamic pitch misalignment angle

    Fig. 1. Schematic of dynamic pitch misalignment angle

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    Relative position of centrifuge and measurement device

    Fig. 2. Relative position of centrifuge and measurement device

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    Coordinate system for centrifuge and measurement device

    Fig. 3. Coordinate system for centrifuge and measurement device

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    Measuring principle of photoelectric autocollimator

    Fig. 4. Measuring principle of photoelectric autocollimator

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    Composition of dynamic measurement system

    Fig. 5. Composition of dynamic measurement system

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    Measurement system layout

    Fig. 6. Measurement system layout

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    Curve of the RSN variation of detector with light intensity

    Fig. 7. Curve of the RSN variation of detector with light intensity

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    Working principle of automatic dimming module

    Fig. 8. Working principle of automatic dimming module

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    Core measurement optical path

    Fig. 9. Core measurement optical path

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    Schematic of reflected light restricted by collimating lens

    Fig. 10. Schematic of reflected light restricted by collimating lens

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    PSF image when reflected beam is unobstructed

    Fig. 11. PSF image when reflected beam is unobstructed

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    PSF image when reflected beam is obstructed

    Fig. 12. PSF image when reflected beam is obstructed

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    Deviation between calculated value and ideal value of tilt angle of planar reflector within range of 0''‒1440''

    Fig. 13. Deviation between calculated value and ideal value of tilt angle of planar reflector within range of 0''‒1440''

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    Impact of environmental temperature changes on measurement

    Fig. 14. Impact of environmental temperature changes on measurement

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    Static pitch angle measurement results

    Fig. 15. Static pitch angle measurement results

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    Dynamic pitch angle measurement results under 1g‒18g output acceleration

    Fig. 16. Dynamic pitch angle measurement results under 1g‒18g output acceleration

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    Fitting results of average dynamic pitch angle under different output accelerations

    Fig. 17. Fitting results of average dynamic pitch angle under different output accelerations

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    • Table 1. Dynamic pitch angle measurement data under various output accelerations

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      Table 1. Dynamic pitch angle measurement data under various output accelerations

      Acceleration /gStandard deviation /（''）Mean value /（''）
      10.091365.814
      20.071375.096
      30.067384.406
      40.061393.816
      50.107403.466
      60.165412.782
      70.159421.927
      80.155431.081
      90.163440.373
      100.186449.551
      110.174458.804
      120.181468.210
      130.131477.476
      140.142486.729
      150.133496.222
      160.149505.637
      170.154514.954
      180.207524.259

    • Table 2. Dynamic pitch misalignment angle of each output acceleration under 1g benchmark

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      Table 2. Dynamic pitch misalignment angle of each output acceleration under 1g benchmark

      Output acceleration /g123456
      Pitch misalignment angle /（''）09.28218.59228.00237.65246.968
      Output acceleration /g789101112
      Pitch misalignment angle /（''）56.11365.26774.55983.73792.990102.396
      Output acceleration /g131415161718
      Pitch misalignment angle /（''）111.662120.915130.408139.823149.140158.445
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    Xin Liu, Shanshan Wang, Peihan Zhang, Dong He, Leilei Hao, Yuxiang Qi, Qun Hao. Dynamic Pitch Misalignment Angle Measurement System for Precision Centrifuges[J]. Laser & Optoelectronics Progress, 2025, 62(9): 0912002

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Jul. 1, 2024

    Accepted: Sep. 24, 2024

    Published Online: May. 6, 2025

    The Author Email: Shanshan Wang (wshan@bit.edu.cn)

    DOI:10.3788/LOP241579

    CSTR:32186.14.LOP241579

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology