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Analysis and demonstration of vibration waveform reconstruction in distributed optical fiber vibration sensing system

机译：分布式光纤振动传感系统中振动波形重构的分析与演示

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摘要

A method for reconstructing the vibration waveform from the optical time-domain backscattering pulses in the distributed optical fiber sensing system (DOFSS) is proposed, which allows for extracting and recovering the external vibration signal from the tested pulses by analog signal processing, so that can obtain vibration location and waveform simultaneously. We establish the response model of DOFSS to the external vibration and analyze the effects of system parameters on the operational performance. The main parts of the DOFSS are optimized, including delay fiber length and wavelength, to improve the sensitivity of the system. The experimental system is set up and the vibration amplitudes and reconstructed waveforms are fit well with the original driving signal. The experimental results demonstrate that the performance of vibration waveform reconstruction is good with SNR of 15 dB whenever the external vibrations with different intensities and frequencies exert on the sensing fiber.
机译：提出了一种在分布式光纤传感系统（DOFSS）中从光时域反向散射脉冲重建振动波形的方法，该方法可以通过模拟信号处理从测试脉冲中提取和恢复外部振动信号，从而可以同时获得振动位置和波形。我们建立了DOFSS对外部振动的响应模型，并分析了系统参数对运行性能的影响。优化了DOFSS的主要部分，包括延迟光纤的长度和波长，以提高系统的灵敏度。建立了实验系统，振动幅度和重构波形与原始驱动信号非常吻合。实验结果表明，当不同强度和频率的外部振动施加在传感光纤上时，SNR为15 dB时，振动波形重建的性能良好。

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  • 来源
    《Optical engineering》 |2017年第10期|107110.1-107110.6|共6页
  • 作者

    Zhu Hui; Shan Xuekang; Sun Xiaohan;

  • 作者单位

    Southeast University, National Research Center for Optical Sensing/Communications Integrated Networking, Department of Electronics Engineering, Nanjing, China;

    Southeast University, National Research Center for Optical Sensing/Communications Integrated Networking, Department of Electronics Engineering, Nanjing, China;

    Southeast University, National Research Center for Optical Sensing/Communications Integrated Networking, Department of Electronics Engineering, Nanjing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    distributed optical fiber sensor; vibration location; vibration waveform reconstruction;

    机译：分布式光纤传感器振动位置;振动波形重建;

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