Infrastructure Structural Health Monitoring

Vibration signals typically contain information about an object’s dynamic processes, which can reveal its movement and structural state. Using distributed fiber optic sensing technology to capture temperature and vibration/acoustic signals generated by moving objects allows for real-time acquisition of strain and damage information, enabling structural health monitoring. Depending on the type of object being monitored, structural health monitoring can be categorized into infrastructure structural health monitoring and large equipment structural health monitoring.

Monitoring the structural health of critical infrastructure such as bridges, tunnels, dams, and railways is crucial for maintaining national economic and social development and ensuring a safe and secure society. Real-time monitoring of infrastructure allows for the rapid detection of structural anomalies and early damage, issuing warnings to prevent accidents, and providing a basis for maintenance, thereby improving operational efficiency and extending the lifespan of the infrastructure.

Advantages:

1) Wide Monitoring Range: A single intterogator can cover a large monitoring area through fiber optic deployment;

2) Simple and Low-Cost Operation and Maintenance: Traditional monitoring methods use numerous single-point sensors, which are costly and complex to maintain.

Application Case: Dam Pipe Surge Detection

Through the laying of sensing optical cables, continuous and dynamic safety monitoring of dams, real-time positioning of piping leakage points, effective monitoring of the slow development of piping, provides a dam safety monitoring means.

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