Objetivo
1. Quasi-distributed polarimetric sensing system
A complete evaluation of the dual mode polarimetric system has been performed and all the different parts required to the assembly of a complete system have been developed. Laboratory demonstrations of an effective strain and temperature separation was successfully performed with a single zone sensor and tests were conducted for both Civil Engineering and Civil Aeronautics for strain only with several sensing zones. The integration process of the sensor was deeply investigated : sensors were installed on composite structures using embedding and retro-fitting techniques, small connectors (ceramic ferrule and tube) were integrated with success in a stiffened panel representative of the part of an aircraft wing. In Civil engineering sensors were installed on representative elements of ground anchors (bonded on steel bars, embedded in concrete).
2. Microwave sensing system
Basic characterisations and calibrations of the system demonstrated its suitability to detect the level of strain that the ground anchors would be subjected to under normal operating conditions. A large number of trials were conducted in the Civil Engineering construction laboratory yielding the validation of the operation of the sensors in both transmission and reflection modes over gauge lengths up to three meters. The sensor conditioning was strongly studied, yielding several attractive means such as integration of the sensing fibre in pultruded glass reinforced plastic rods and braid protection sheaths. Standard single mode connectors were used. A pultruded glass reinforced plastic rod sensor with a reference fibre embedded in a loose tube was manufactured, installed and tested. Measurements over several cycles of the sensor showed that the free fibre was not strained and therefore could be used as a thermal reference. In terms of system a compact and robust transportable prototype of instrument was developed, using commercially available components.
3. Impact induced damage sensing system
Radome structures were constructed from a sandwich of D Glass epoxy skins bonded to a high density foam material. To accommodate the sensor, grooves were machined in the foam. Different configurations of sensors were investigated including side hole fibres of different intrinsic pressure sensitivities, different plastic tubes diameters and groove characteristics such as shape and depth. Sensitivity of the sensor to damages induced by impacts of around 5 Joules was demonstrated and spatial location of a damage can be identified to within 1 cm without difficulty. Most of the experimentation were conducted on flat panels representative of the dome structure then verified on one dome.
The need for continuous health monitoring of structures is arising in two main areas:
- Civil engineering where tendons, staycables and concrete structures have to withstand increasing demands in terms of strength requirements and ageing effects.
- Aeronautics where structural parts made from advanced composite materials are being increasingly used on aircraft and other transportation systems.
Due to their low invasivity and capability for distributed sensing, fibre optics sensors are promising candidates. A previous BRITE project showed the laboratory feasibility of measuring the strain distribution inside a composite material by embedding a white light quasi distributed optical fibre polarimetric sensor. The possibility to simultaneously measure temperature and strain was also demonstrated.
The aim of this new project are to develop a generic sensing tool based on adaptations of the above principles and to demonstrate its applicability for the monitoring of strain, damage initiation and temperature in actual structures. The work will be carried out as follow:
- Specific optical fibre transducers and relevant receiving units shall be developed according to requierements of aeronautic and civil engineering end users. An optical microwave snsor shall also be considered for the extension to long length (more than few tens of meters) civil engineering structures. Where appropriate miniaturized and rugged systems will be built.
- Industrial methods for embedding or attaching sensors to structures and their connection schemes shall be implemented and tested for durability/ageing in both civil structures and aeronautical composites.
- Prototypes of monitored industrial components will be implemented and tested:
- stay cable, steel tension elements, and tension/cracked area of concrete structures for civil engineering.
- carbon/epoxy stiffened composite panel representative of a wing section in aircraft and a kevlar/epoxy composite radome for aeronautics.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
- ingeniería y tecnología ingeniería de materiales compuestos
- ingeniería y tecnología ingeniería civil
- ingeniería y tecnología ingeniería mecánica ingeniería de vehículos ingeniería aeroespacial aeronave
- ingeniería y tecnología ingeniería eléctrica, ingeniería electrónica, ingeniería de la información ingeniería electrónica sensores
- ingeniería y tecnología ingeniería mecánica ingeniería de vehículos ingeniería aeroespacial ingeniería aeronáutica
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Programa(s)
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Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.
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Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.
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Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.
Régimen de financiación
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Coordinador
13791 AIX-EN-PROVENCE
Francia
Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.