Distributed Fiber Optic Sensor Network Based Real-Time Damage Diagnosis System and Structural Health Monitoring Method

Invention provides reliable real-time damage detection in structural components using a Distributed Fiber Optic Sensor (D-FOS) network under load-free conditions. Conventional SHM methods require applying loads during baseline measurement and each inspection, which increases downtime, cost, and operational complexity. Repeated loading can also introduce measurement variability and safety risks, especially for large structures such as aircraft. The approach in the invention simplifies inspection procedures, reduces operational disruption, improves safety, and lowers overall inspection cost while maintaining accurate structural health monitoring.

• Aerospace / Aviation – Structural health monitoring of aircraft composite
  structures, wings, fuselage panels, and bonded joints
• Construction / Infrastructure – Structural monitoring of bridges, buildings, and
  other large civil structures using distributed fiber optic sensing networks
• Distributed fibre Optic Sensor Market is estimated to be valued at USD 1,681.5 Mn in 2026 and is expected to reach USD 3,015.1 Mn in 2033, exhibiting a compound annual growth rate (CAGR) of 8.7% from 2026 to 2033

• Uses a tare strain profile to compare measurements over time, allowing
  accurate identification of structural damage without repeated loading cycles
• Combines OFDR technology with embedded/bonded distributed fiber optic
  sensors, enabling efficient, continuous monitoring of structural health during
  routine maintenance
• Structural health monitoring without applying external load during inspection,
  eliminating load-induced strain changes
• Elimination of Load Application During Periodic Inspection
• Real-Time Damage Diagnosis in Load-Free Conditions
• Reduction in Inspection Time and Complexity