Unattended ground sensor based on fiber Bragg grating technology

Yan Zhang, Sanguo Li, Zhifan Yin, Hong Liang Cui, Kurt O'Donnell, Robert Pastore, Michael Pellicano, Dowell Black, John Kosinski

Research output: Contribution to journalConference articlepeer-review

15 Scopus citations

Abstract

In this paper we have demonstrated an unattended seismic wave sensor based on the optical fiber Bragg grating (FBG) sensing technology. The basic principle of seismic wave detection and the fiber Bragg grating sensing technique is introduced in brief. Our FBG seismic sensor system consists of the broadband light source, FBG sensors coupled with spring / mass configuration, 3-dB optical couplers, demodulator FBG gratings, signal detection and processing hardware. Systematic experiments were carried out in Fort Dix at New Jersey. Target source includes personnel, military HMMWV and wheeled truck. The FFT analysis shows that the frequency response of the seismic signal is 20-40 Hz. The comparison data also show that the FBG sensor is more sensitive than the conventional seismic sensor both in personnel and vehicle detection. The ultimate object of this imbedded fiber optic sensor system is to recognize the presence of troop or vehicle movement through their induced seismic activity as a helpful tool in battlefield monitoring and perimeter defense system.

Original languageEnglish
Article number18
Pages (from-to)133-140
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5796
DOIs
StatePublished - 2005
EventUnattended Ground Sensor Technologies and Applications VII - Orlando, FL, United States
Duration: 28 Mar 20051 Apr 2005

Keywords

  • Fiber optic sensors
  • Seismic detection

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