Fig. 1. (a) System architecture and photograph of control nodes; (b) internal structures of central and slave nodes

Fig. 2. Software flowchart of control system

Fig. 3. Influence of number of node and redundant fiber on healthy state of a distributed sensor in long-term monitoring

Fig. 4. Combined operation of RDTS and proposed control system

Fig. 5. Structure of optical control and sensing signals between nodes

Fig. 6. Failure situation simulation

Fig. 7. Schematic diagram of regular optical cable monitoring pipe laying

Fig. 8. Schematic diagram of multi-section intelligent distributed fiber sensor control system for pipe laying monitoring