Solutions Oil & Gas, Energy, Mining Pipeline Strain Monitoring
A distributed system will provide an equivalent of a discrete sensor for every meter of fibre installed. Distributed strain monitoring allows for continuous sensing along 10’s of kilometers of a loop of single mode optical fibre. The ends of the fibre are terminated at the input and output ports of a Brillouin Optical Frequency Domain Interrogator, the optical pulse is generated at the interrogator and analyzed upon its return.
The tight fibre, shown below, is coupled to the protective jacket and thus to the surrounding ground, allowing for strain transfer of up to ± 3% (±30,000µε) from the medium in which it is installed. Due to the cost of the monitoring equipment, systems tend to only be cost effective at large monitoring lengths (>1km) and several hundred measuring points.
Source: Brugg Cables Direct Burial Fibre Optic Line
Advantages/Disadvantages Fully Distributed Brillouin Sensing: