A fibre optic cable monitoring method and system
AssigneeFiber Sense Limited
InventorsNathaniel LINDSEY, Mark Andrew ENGLUND
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Abstract
Method and system for determining the condition of a cable are disclosed. The method includes: transmitting interrogating signals into a sensing optical fibre extending the length of the cable and receiving backscattered signals from the sensing optical fibre in response to the interrogating signals. The method further includes processing the backscattered signals to determine variations in strain or strain rate along the sensing optical fibre and determining the time history of the strain or strain rate to obtain accumulated strain data indicative of the condition of the cable at points along the cable.
Claims20
A method for determining a condition of a cable, the method comprising:
- transmitting interrogating signals into a sensing optical fibre extending a length of the cable;
- receiving backscattered signals from the sensing optical fibre in response to the interrogating signals;
- processing the backscattered signals to determine variations in strain or strain rate along the sensing optical fibre;
- and
- determining a time history of the strain or strain rate to obtain accumulated strain data indicative of the condition of the cable at points along the cable.
A distributed fiber optic sensing (DFOS) system for determining a condition of a cable, the system comprising:
- a light source for transmitting interrogating signals into a sensing optical fibre extending a length of the cable;
- a photodetector for receiving backscattered signals from the sensing optical fibre in response to the interrogating signals;
- a processing unit configured to:
- process the backscattered signals to determine variations in strain or strain rate along the sensing optical fibre;
- and
- determine a time history of the strain or strain rate to obtain accumulated strain data indicative of the condition of the cable at points along the cable.
Dependencies are inferred from the claim text.