title: A ten channel fibre-optic device for distributed sensing of underground hydrocarbon leakage.
abstract: With millions of fuel storage tanks and oil pipelines installed around the world, there is inevitably frequent leakage of potentially hazardous hydrocarbons. As many of these installations are below ground, it can often be many years before the extent of the leak is discovered. We have previously reported the development of a sensor for the detection of such subterranean leaks, using infrared reflectometry to interrogate a hydrocarbon sensitive membrane. However, a single sensor cannot provide any information about the flow rate or direction of the leak. This paper describes the extension of the technology to a multi-channel distributed sensing system, using optical fibres capable of distributing the sensors over large subterranean areas. Results are reported from the evaluation of the device, which consisted of monitoring the movement of different hydrocarbons (gasoline, diesel and insulating oil) through a vertical sand-filled vessel.
authors: Cranfield Centre for Analytical Science, Cranfield University, Silsoe, Bedfordshire, UK MK45 4DT.
authors: L J
authors: LJ
authors: Ritchie
authors: C P
authors: CP
authors: Ferguson
authors: C
authors: C
authors: Bessant
authors: S
authors: S
authors: Saini
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation*; D005336:Fiber Optic Technology / Q000379:methods*; D006838:Hydrocarbons / Q000032:analysis*; D010578:Petroleum; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D006838:Hydrocarbons; D010578:Petroleum; D012989:Soil Pollutants