Submarine Cable State Estimation Using Optical Fiber Vibration Response

The patent applies preliminary action by calculating response characteristics to vibration for each point on the submarine cable during normal operation conditions. This preliminary calculation creates a baseline database of normal response characteristics that can be used for future abnormality detection, eliminating the need to wait for actual abnormal events to occur.

The patent inverts the traditional approach by instead of preparing abnormality data in advance, it prepares normal state data (response characteristics during normal operation) and uses this to detect abnormalities through comparison. This inversion allows data acquisition during common normal operations rather than rare abnormal events.

The system performs self-service by automatically calculating response characteristics to vibration for each point on the submarine cable using measured vibration data. This automated calculation process eliminates the manual preparation of training signals and enables the system to generate its own baseline data during normal operation without external intervention.

The patent changes the fundamental parameter used for state estimation from pre-prepared abnormality training signals to calculated response characteristics based on vibration measurements. This parameter change transforms the approach from requiring rare abnormality data to using readily available normal operation vibration data.