Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

RF sensing system to detect the necessary extension differences with adequate sensitivity

A method has been developed for measuring strain using optical fibre sensors that is independent of optical power levels over a wide range of values. This is important for the strain measurement of gas tanks since pressurisation of the tanks produces changes in the fibre attenuation. It could also have applications in other strain measurement applications, since changing power levels due to ageing of components or external environmental factors is always a very strong possibility.

The sensors can be used in either transmissive or reflective mode, which makes them easier to implement into a practical system. Optical switching to interrogate a number of sensors sequentially has also proved to be effective.

The technology used for the interrogation system is based on electronics operating at similar frequencies to those used in the mobile phone industry and therefore offers the possibility of development for mass production at an economical cost

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