Open AccessIntruder detection trial in subway tunnel based on distributed vibration response
Author(s) -
Jie Wang,
Yang Qiu,
Sheng Li
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/638/1/012080
Subject(s) - vibration , intrusion , fiber bragg grating , signal (programming language) , intrusion detection system , computer science , structural engineering , acoustics , engineering , optical fiber , computer security , geology , telecommunications , physics , geochemistry , programming language
Identifying illegal intruders is a crucial issue in subway safety management. This paper performs an intrusion detection trial through distributed vibration measurements on a real underground engineering and the ultra-weak fiber optic Bragg grating (FBG) sensing technology was adopted to glean the strucutral vibration signal of the intruder loading. The results showed that the signal model in the distributed structural vibration can be utilized to illustrate the location and speed of the intruders. Besides, the information in both time and frequency domains in the selected experimental area demonstrated that the ultra-weak FBG-based approach is able to distinguish designed intrusion cases in terms of pattern and strength.