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Acta Optica Sinica, Volume. 38, Issue 10, 1006004(2018)

Structural Impact Localization Based on Optical Fiber Sagnac Sensing Technique

Zhuming Cheng1,2、*, Jie Zeng1, Chen Chang1, Xuegang Song1, and Dakai Liang1、*
Author Affiliations
  • 1 State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China
  • 2 College of Electrical and Information Engineering, Anhui University of Technology, Maanshan, Anhui 243002, China
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    AbstractGet PDF(in Chinese)
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    Figures & Tables(10)
    Schematic of optical fiber Sagnac sensor

    Fig. 1. Schematic of optical fiber Sagnac sensor

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    Schematic of locations of impact points and sensing probes

    Fig. 2. Schematic of locations of impact points and sensing probes

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    Physical devices of impact localization system

    Fig. 3. Physical devices of impact localization system

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    Schematic of time difference-based method

    Fig. 4. Schematic of time difference-based method

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    Impact response signals. (a) Signal of sensor 1; (b) signal of sensor 2

    Fig. 5. Impact response signals. (a) Signal of sensor 1; (b) signal of sensor 2

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    Signals of de-noising by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2

    Fig. 6. Signals of de-noising by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2

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    Reconstructed signals by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2

    Fig. 7. Reconstructed signals by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2

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    Wavelet packet energy spectra of impact response signals. (a) Signal energy spectrum of sensor 1; (b) signal energy spectrum of sensor 2

    Fig. 8. Wavelet packet energy spectra of impact response signals. (a) Signal energy spectrum of sensor 1; (b) signal energy spectrum of sensor 2

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    Time difference of narrow-band signals. (a) Signal of sensor 1; (b) signal of sensor 2

    Fig. 9. Time difference of narrow-band signals. (a) Signal of sensor 1; (b) signal of sensor 2

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    • Table 1. Results of impact localization experiments

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      Table 1. Results of impact localization experiments

      Reference position /cmRecognized position /cmMaximum error /cmRMS error /cm
      1st2nd3rd4th5th
      1010.1010.1210.2310.3610.340.360.25
      2019.8820.2419.8519.8319.720.280.20
      3030.5129.8629.8929.9829.730.510.27
      4039.7440.3940.0439.8739.350.650.36
      5049.6249.6550.0249.6849.880.380.28
      6060.5459.5859.7660.0760.280.540.33
      7069.8569.6869.7770.3269.390.610.36
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    Zhuming Cheng, Jie Zeng, Chen Chang, Xuegang Song, Dakai Liang. Structural Impact Localization Based on Optical Fiber Sagnac Sensing Technique[J]. Acta Optica Sinica, 2018, 38(10): 1006004

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Mar. 15, 2018

    Accepted: May. 8, 2018

    Published Online: May. 9, 2019

    The Author Email:

    DOI:10.3788/AOS201838.1006004

    Topics

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