Particular Aspects of Sensor Application

Sensor Selection According to the Measurement and Monitoring Tasks 

Depending on the fiber optic sensor type, different kinds of application are 

In order to evaluate the actual bonding behaviour between fiber coating and matrix material as well as the load transfer limit of embedded sensing elements, the micro indentation test method can be used [57,58]. A thin slice of material containing the embedded sensing element (dimensions, coating, and position) is deformed this method delivers the shear stress behaviour at the interface when the material is deformed. The recorded force-deformation curve allows the estimation of the limit of reliable sensor operation. 

Proof of the Reliability of Fiber Optic Sensor System — Validation 

However, all necessary system components such as cables, couplers, sources, demodulation units, require reflection with regard to reliability and stability, especially, when standard fiber sensor components are modified according to specific requirements or for critical application [59-62]. Users of measurement systems want to be definitely sure that a chosen sensor system is suitable and reliable for the specific intended use. A very useful method is the vahdation procedure of a measurement system or of components of it because they then get assured information about performance and limitations of a sensor system. Then they are able to draw feasible conclusions. Vahdation is explained in the international standard ISO/IEC 17025 of the International Standardization Organization (ISO) [63]. According to this standard, validation is the confirmation by examination and the provision of objective evidence that the particular requirements for a specific intended use are fulfilled. 

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