相敏光时域反射技术振动定位分析
Vibration Positioning Analysis of Phase Sensitive Optical Time Domain Reflectometry
摘要: 相敏光时域反射技术是最常用的分布式光纤传感技术之一，具有广泛的理论和实际研究价值。通过算法对其后向瑞利散射光分析是得到外部振动位置信息的常用手段。本文提出了一种基于巴特沃斯滤波的算法，此算法通过频域滤波实现对相敏光时域反射技术进行外界振动位置的监测。通过巴特沃斯低通滤波传递函数，对高频噪声进行滤波，只保留与振动信号相关的低频信号，从而达到去噪的功能，继而找到振动位置。实验结果表明：在长度为3.5 km的传感光纤上，该滤波方法在不影响系统的空间分辨率情况下，对于沿传感光纤100 Hz的振动信号而言，振动位置的信噪比可以达到20.5 dB，表明了该振动检测新方法具有突出的性能。
Abstract: Phase sensitive optical time domain reflectometry is one of the most commonly technologies for distributed optical fiber sensing and it has a wide range of theoretical and practical research values. The common method to obtain external vibration position information is analyzing the backward Rayleigh scattered light by signal processing algorithms. In the paper, a novel signal processing method based on butter-worth filtering is proposed to realize the external vibration position monitoring of phase sensitive optical time domain reflection technology. The vibration position can be obtained by the Butterworth low-pass filter transfer function. The high-frequency noise can be filtered by this method, which means the low-frequency signal related to the vibration signal is retained. Experiment results show that the SNR is increased to 20.5 dB for the vibration event of 100 Hz along 3.5 km sensing fiber without affecting the spatial resolution of the system, which indicates the prominent performance of the novel method for vibration detection.
文章引用：李海燕. 相敏光时域反射技术振动定位分析[J]. 声学与振动, 2019, 7(3): 77-83. https://doi.org/10.12677/OJAV.2019.73008

参考文献

[1] Russell, S.J., Brady, K.R.C. and Dakin, J.P. (2001) Real-Time Location of Multiple Time-Varying Strain Disturbances, Acting over a 40 km Fiber Section, Using a Novel Dual-Sagnac Interferometer. Journal of Lightwave Technology, 19, 205-213. [Google Scholar] [CrossRef] 
[2] Sun, Q., Liu, D., Wang, J. and Liu, H. (2008) Distributed Fi-ber-Optic Vibration Sensor Using a Ring Mach-Zehnder Interferometer. Optics Communications, 281, 1538-1544. [Google Scholar] [CrossRef] 
[3] Liu, X., Wang, Y., Zhang, J., Wang, D., Wang, P., Bai, Q. and Jin, B. (2018) Real-Time Distributed Optical Fiber Vibration Sensing Based on Phase-Sensitive OTDR. International Symposium on Optoelectronic Technology and Application, Beijing, 22-24 May 2018, 108491J. [Google Scholar] [CrossRef] 
[4] 彭正谱. 高性能长距离相敏光时域反射系统研究及安防应用[D]: [硕士学位论文]. 成都: 电子科技大学, 2014.
[5] Gangopadhyay, T.K. and Henderson, P.J. (1999) Vibration: History and Measurement with an Extrinsic Fabry-Perot Sensor with Solid-State Laser Interferometry. Applied Optics, 38, 2471-2477. [Google Scholar] [CrossRef] 
[6] Tsuda, H. (2010) Fiber Bragg Grating Vibration-Sensing System, Insensitive to Bragg Wavelength and Employing Fiber Ring Laser. Optics Letters, 35, 2349-2351. [Google Scholar] [CrossRef] 
[7] 夏俏兰. 分布式光纤传感器的长距离密集波分复用技术和应用研究[D]: [硕士学位论文]. 杭州: 浙江大学, 2017.
[8] Masoudi, A. and Newson, T.P. (2017) High Spatial Resolution Distributed Optical Fiber Dynamic Strain Sensor with Enhanced Frequency and Strain Resolution. Optics Letters, 42, 290-293. [Google Scholar] [CrossRef] 
[9] Peled, Y., Motil, A., Yaron, L. and Tur, M. (2011) Slope-Assisted Fast Distributed Sensing in Optical Fibers with Arbitrary Brillouin Profile Slope-Assisted Fast Distrib-uted Sensing in Optical Fibers with Arbitrary Brillouin Profile. Optics Express, 19, 19845-19854. [Google Scholar] [CrossRef] 
[10] Dong, Y., Ba, D., Jiang, T., Zhou, D., Zhang, H., Zhu, C., Lu, Z., Li, H., Chen, L. and Bao, X. (2013) High-Spatial- Resolution Fast BOTDA for Dynamic Strain Measurement Based on Differential Double-Pulse and Second-Order Sideband of Modulation. IEEE Photonics Journal, 5, Article ID: 2600407. [Google Scholar] [CrossRef] 
[11] Noguchi, K., Murakami, Y., Kimura, Y. and Ishihara, K. (1982) Ultralong Multimode Optical Fibre Fault Location Using Raman Optical Time Domain Reflectometry. Electronics Letters, 18, 542-543. [Google Scholar] [CrossRef] 
[12] Martins, H.F., Martin-Lopez, S., Corredera, P., Filograno, M.L., Frazao, O. and Gonzalez-Herráez, M. (2014) Phase-Sensitive Optical Time Domain Reflectometer Assisted by First-Order Ra-man Amplification for Distributed Vibration Sensing over > 100 km. Journal of Lightwave Technology, 32, 1509-1518. [Google Scholar] [CrossRef] 
[13] Wang, C., Shang, Y., Liu, X. and Peng, G. (2015) Distributed Acoustic Mapping Based on Interferometry of Phase Optical Time-Domain Reflectometry. Optics Communications, 346, 172-177. [Google Scholar] [CrossRef] 
[14] Ren, M., Lu, P., Chen, L. and Bao, X. (2016) Theoretical and Experimental Analysis of Φ-OTDR Based on Polarization Diversity Detection. IEEE Photonics Technology Letters, 28, 697-700. [Google Scholar] [CrossRef] 
[15] Peng, F., Wu, H., Jia, X., Rao, Y., Wang, Z. and Peng, Z. (2014) Ultra-Long High-Sensitivity Φ-OTDR for High Spatial Resolution Intrusion Detection of Pipelines. Optics Ex-press, 22, 13804-13810. [Google Scholar] [CrossRef] 
[16] Juarez, J.C., Maier, E.W., Choi, K.N. and Taylor, H.F. (2005) Distrib-uted Fiber-Optic Intrusion Sensor System. Journal of Lightwave Technology, 23, 2081-2087. [Google Scholar] [CrossRef] 
[17] Zhu, T., He, Q., Xiao, X. and Bao, X. (2013) Modulated Pulses Based Distributed Vibration Sensing with High Frequency Response and Spatial Resolution. Optics Express, 21, 2953-2963. [Google Scholar] [CrossRef] 
[18] Lu, B., Pan, Z., Wang, Z., Zheng, H., Ye, Q., Qu, R. and Cai, H. (2017) High Spatial Resolution Phase-Sensitive Optical Time Domain Reflectometer with a Frequency-Swept Pulse. Optics Letters, 42, 391-394. [Google Scholar] [CrossRef] 
[19] Lu, Y., Zhu, T., Chen, L. and Bao, X. (2010) Distributed Vibration Sensor Based on Coherent Detection of Phase-OTDR. Journal of Lightwave Technology, 28, 3243-3249.
[20] Qin, Z., Chen, L. and Bao, X. (2012) Wavelet Denoising Method for Improving Detection Performance of Distributed Vibration Sensor. IEEE Photonics Technology Letters, 24, 542-544. [Google Scholar] [CrossRef] 
[21] Zhu, Xiao, X., He, Q. and Diao, D. (2013) Enhancement of SNR and Spatial Resolution in φ-OTDR System by Using Two-Dimensional Edge Detection Method. Journal of Lightwave Technology, 31, 2851-2856. [Google Scholar] [CrossRef] 
[22] Soto, M.A., Ramirez, J.A. and Thevenaz, L. (2016) Intensifying the Response of Distributed Optical Fibre Sensors Using 2D and 3D Image Restoration. Nature Communications, 7, Ar-ticle No. 10870. [Google Scholar] [CrossRef] [PubMed]
[23] He, H., Shao, L., Pan, W., Luo, B., Zou, X. and Yan, L. (2017) SNR Enhancement in Phase-Sensitive OTDR with Adaptive 2D Bilateral Filtering Algorithm, IEEE Photonics Journal, 9, Ar-ticle ID: 6802610.

为你推荐