Structure control applications covers the monitoring of the mechanical strain, displacements and temperatures inside civil engineering structure and industrial large equipment, such as bridges, dams, motors, etc.… Structure health monitoring is a necessary activity when security is on risk and lifetime an associated economical challenge. The real-time tracking of strain or temperature in structure may also allow reducing the manufacturing and maintenance cost.
Many of these challenges can be addressed through regular electro-mechanical sensors. However, such thermal or strain sensor are not easy to implement in harsh environment with strong electromagnetic fields (electrical generator, lightening), high-temperature or very limited space for cables path. Moreover, in the domain of strain measurement, some application may require very high sensitivity.
From an economical point of view, the price per measurement point may become prohibitive if the interrogator unit has poor multiplexing capability.