A Surveillance System for Urban Utility Tunnel Subject to Third-Party Threats Based on Fiber-Optic DAS and FPN-BiLSTM Network - He, Tao; Li, Hao; Zhang, Shixiong; Zeng, Zhichao; Yan, Zhijun; Sun, Qizhen; Liu, Deming (IEEE transactions on instrumentation and measurement, 2024)
Keywords: Accuracy; Acoustics; Bidirectional long short-term memory (Bi-LSTM); distributed acoustic sensing (DAS); Feature extraction; Feature maps; feature pyramid network (FPN); Fiber optics; Field tests; Geological mapping; Monitoring; Nodes; Optical fiber networks; Optical fiber sensors; pattern recognition; spatiotemporal–spectral (STS) feature; Surveillance systems; Target recognition; Three dimensional models; Time-frequency analysis; Underground structures