Photonic Sensors

, Volume 8, Issue 1, pp 48–55 | Cite as

An energy ratio feature extraction method for optical fiber vibration signal

  • Zhiyong Sheng
  • Xinyan Zhang
  • Yanping Wang
  • Weiming Hou
  • Dan Yang
Open Access


The intrusion events in the optical fiber pre-warning system (OFPS) are divided into two types which are harmful intrusion event and harmless interference event. At present, the signal feature extraction methods of these two types of events are usually designed from the view of the time domain. However, the differences of time-domain characteristics for different harmful intrusion events are not obvious, which cannot reflect the diversity of them in detail. We find that the spectrum distribution of different intrusion signals has obvious differences. For this reason, the intrusion signal is transformed into the frequency domain. In this paper, an energy ratio feature extraction method of harmful intrusion event is drawn on. Firstly, the intrusion signals are pre-processed and the power spectral density (PSD) is calculated. Then, the energy ratio of different frequency bands is calculated, and the corresponding feature vector of each type of intrusion event is further formed. The linear discriminant analysis (LDA) classifier is used to identify the harmful intrusion events in the paper. Experimental results show that the algorithm improves the recognition rate of the intrusion signal, and further verifies the feasibility and validity of the algorithm.


OFPS energy ratio LDA classification 



This work was supported by the National Natural Science Foundation of China (Grant No. 61571014); Beijing Natural Science Foundation (Grant No. 4164093).


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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Zhiyong Sheng
    • 1
  • Xinyan Zhang
    • 1
  • Yanping Wang
    • 1
  • Weiming Hou
    • 2
  • Dan Yang
    • 1
  1. 1.School of Electronic and Information EngineeringNorth China University of TechnologyBeijingChina
  2. 2.School of Information Science and EngineeringHebei University of Science & TechnologyShijiazhuangChina

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