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Fibre optic uv sensing

Project is focused on development of integrated sensor system which will be applied to detection of ultra-violet (uv) radiation in high temperature areas. The sensor system is based on fibre-optic components built in fully portable system.

Detection of UV radiation in regions UV-A (400–315 nm), UV-B (315–280 nm), and also UV-C (280–100 nm) comes very important in many branches of industry and also in chemistry and medicine. The detection of UV radiation is required e.g. in industrial curing processes, control processes in food industry, spectroscopy (absorption, fluorescence), photocatalytic processes and direct UV cleaning. Special industrial applications require detection of UV radiation during high temperature processes and under electromagnetic disturbances. In this case, the conventional approaches using isolated metallic wires (connections) can not be used. As a typical example a technological process of curing by UV light can be mentioned at which temperatures rise above the melting temperature of wire insulators, tin connections and electromagnetic disturbances influence measured signals in copper wires. In these cases, the fibre-optic approach can be used because melting temperatures of optical (silica) fibres is much higher and optical fibres are immune to external electromagnetic disturbances. The proposed project is focused on the development of an integrated sensor system which will be applied for detection of UV radiation in the above described applications. The sensor system is based on fibre optic components built in a fully portable system. The key parts of this novel optical sensor system will be a sensing head, fibre-optic element and detection unit. The sensing head will be based on a section of an optical fibre molded to the optimal shape to be able to collect UV radiation under different angle. This head will be covered by a special hausing and connected via a fiber-optic connector to the fibre-optic element. The fibre-optic element(s) transparent in defined UV regions will be employed for guiding UV radiation from the sensing head to the detection part. A suitable optical fibre will be specially coated in order to protect this fiber to high temperature because conventional coatings are not sufficiently resistant to high temperatures and can´t be used for such purposes. Both parts - sensing head and fibre-optic element will be resistive to high temperatures and external electromagnetic disturbances. In the detection part, the guided photons from the fibre-optic element will be transformed to an electrical signal. This electrical signal will be digitalized, further processed, evaluated and displayed by using designed electronics and software. This fully portable system will be designed and developed for the purpose of intensity measurements of UV radiation in spectral ranges of full UV-A (400–315 nm), full UV-B (315–280 nm), and partly in UV-C (280–220 nm) in zones with high temperatures (up to ca 300°C) and/or (strong) electromagnetic disturbances (high voltages). All parts will be assembled into a prototype of the sensor system which functionality will be tested.
Acronym: 
FOUVS
Project ID: 
7 202
Start date: 
01-01-2012
Project Duration: 
48months
Project costs: 
1 500 000.00€
Technological Area: 
Sensors/Multisensor Technology, Instrumentation
Market Area: 
Other Industrial Products (not elsewhere classified)

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.