Fei XIONG, Boyang QU, Guangnan ZHOU, Haoran WANG, Xuping ZHANG, Lei LIANG, Jin WANG, Shisong ZHAO, Dao ZHANG, Feng WANG, Yixin ZHANG. A Broken Wire Detection System of PCCP Pipeline Based on Φ‑OTDR and MZI[J]. Optoelectronic Technology, 2023, 43(2): 133
- Optoelectronic Technology
- Vol. 43, Issue 2, 133 (2023)
Fig. 1. Acoustic signal of broken wire
Fig. 2. Structural diagram of broken wire detection system of PCCP pipeline merged with Φ‑OTDR and MZI
Fig. 3. Schematic of IQ demodulation
Fig. 4. Schematic of the position of PZT
Fig. 5. Original waveform diagrams
Fig. 6. Φ-OTDR system with applying 10.1 kHz vibration signal by PZT
Fig. 7. MZI system with applying 10 kHz vibration signal by PZT
Fig. 8. Time domain spectrum of different vibration signals
Fig. 9. Frequency spectrum of different vibration signals
Fig. 10. Broken wire simulation device
Fig. 11. Layout of the optical fiber on the plate
Fig. 12. Time domain waterfall plot during the drop of the steel sphere
Fig. 13. Location information of the sphere drop
Fig. 14. Position of five-time sphere drops
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