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Chinese Journal of Lasers, Volume. 51, Issue 17, 1706007(2024)

Research on Miniature Triaxial Vibration Sensor Based on Four‐Core Fiber Grating

Xiang Tang1,2, Jingtao Xin1,2,3、*, Kun Li1,2, Jun Wu4, and Mingli Dong1,2,3
Author Affiliations
  • 1Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, School of Instrument Science and Optoelectronic Engineering, Beijing Information Science & Technology University, Beijing 100192, China
  • 2Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science &; Technology University, Beijing 100016, China
  • 3Guangzhou Nansha Intelligent Photonic Sensing Research Institute, Guangzhou 511462, Guangdong , China
  • 4Beijing Institute of Space Electromechanics, Beijing 100089, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (15)
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    References (18)
    Cited By (2)
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    Figures & Tables(15)
    Schematic of triaxial vibration sensor based on four-core fiber grating

    Fig. 1. Schematic of triaxial vibration sensor based on four-core fiber grating

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    Schematic of vibration sensor structure

    Fig. 2. Schematic of vibration sensor structure

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    Schematic of bending sensing after writing FBG with multi-core fiber core

    Fig. 3. Schematic of bending sensing after writing FBG with multi-core fiber core

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    Theoretical analysis diagram of sensor mechanics

    Fig. 4. Theoretical analysis diagram of sensor mechanics

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    Combined structure of multi-core fiber and nickel titanium alloy tube

    Fig. 5. Combined structure of multi-core fiber and nickel titanium alloy tube

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    Simulation diagrams of sensor structure. (a) Mode diagram; (b) stress distribution diagram

    Fig. 6. Simulation diagrams of sensor structure. (a) Mode diagram; (b) stress distribution diagram

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    Amplitude-frequency response curves. (a) Whole; (b) 10‒300 Hz

    Fig. 7. Amplitude-frequency response curves. (a) Whole; (b) 10‒300 Hz

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    Packaging system for microscopic imaging

    Fig. 8. Packaging system for microscopic imaging

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    Physical image of packaged sensor

    Fig. 9. Physical image of packaged sensor

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    Vibration sensor test system

    Fig. 10. Vibration sensor test system

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    Test results. (a) Time domain characteristic curve of piezoelectric vibration sensor; (b) time domain characteristic curve of fiber core 2

    Fig. 11. Test results. (a) Time domain characteristic curve of piezoelectric vibration sensor; (b) time domain characteristic curve of fiber core 2

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    Amplitude-frequency response curves of vibration sensor. (a) x-direction; (b) y-direction; (c) z-direction

    Fig. 12. Amplitude-frequency response curves of vibration sensor. (a) x-direction; (b) y-direction; (c) z-direction

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    Sensor sensitivity response curves

    Fig. 13. Sensor sensitivity response curves

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    Variation curve of fiber acceleration

    Fig. 14. Variation curve of fiber acceleration

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    • Table 1. Structural parameters of multi-core fiber and sensor

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      Table 1. Structural parameters of multi-core fiber and sensor

      SymbolParameterValue
      lFiber grating length /mm1
      AfFiber cross-sectional area /mm20.012272
      EfFiber elastic modulus /GPa72
      dFiber core spacing /mm0.1
      dfFiber diameter /mm0.125
      λfFiber wavelength / nm1550
      mMass of mass block /g0.485
      q1

      Outer diameter of nickel titanium

      alloy pipe /mm

      		0.18
      q2

      Inner diameter of nickel titanium

      alloy pipe /mm

      		0.16
      L

      Distance between mass block

      and insert core /mm

      		3
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    Xiang Tang, Jingtao Xin, Kun Li, Jun Wu, Mingli Dong. Research on Miniature Triaxial Vibration Sensor Based on Four‐Core Fiber Grating[J]. Chinese Journal of Lasers, 2024, 51(17): 1706007

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    Paper Information

    Category: Fiber optics and optical communication

    Received: Nov. 30, 2023

    Accepted: Apr. 7, 2024

    Published Online: Sep. 1, 2024

    The Author Email: Jingtao Xin (xinjinggtao@bistu.edu.cn)

    DOI:10.3788/CJL231458

    CSTR:32183.14.CJL231458

    Topics

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