Chen Wang, Qingwen Liu, Dian Chen, He Li, Wenbo Liang, Zuyuan He. Monitoring Pipeline Leakage Using Fiber-Optic Distributed Acoustic Sensor[J]. Acta Optica Sinica, 2019, 39(10): 1006005
- Acta Optica Sinica
- Vol. 39, Issue 10, 1006005 (2019)
Fig. 1. Schematic of HiFi-DAS system
Fig. 2. Front and side views of pipeline and optical cable. (a) Front view; (b) side view
Fig. 3. Amplitude of leakage signal at each location
Fig. 4. 2560 differential phase traces demodulated under 0.2 MPa gas pressure
Fig. 5. Standard deviation curves at the end of fiber under different conditions. (a) No leakage; (b) 0.2 MPa gas pressure
Fig. 6. Standard deviation curves of leaking holes at different positions. (a) Position 1; (b) position 2; (c) position 3
Fig. 7. 2560 differential phase traces demodulated under 0.05 MPa gas pressure
Fig. 8. Noise statistics. (a) Power spectrum; (b) amplitude distribution
Fig. 9. Differential phase trace and standard deviation curve at the end of fiber after wavelet denoising under gas pressure of 0.05 MPa. (a) Differential phase trace; (b) standard deviation at the end of fiber
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