The context of this PhD project is the one of Non Destructive Techniques and, more generally, Structural Health Monitoring. This topic represents one of the core major research topics of UGE Laboratories (Lab SII: Structures and Integrated Instrumentation as well as Lab GEOEND: Geotechnical and Non Destructive techniques) in collaboration with CEA List Laboratory (numerical innovation dedicated to innovative key solutions in the fields of, among others,  NDT and SHM). In each of those academic structures researchers and engineers developp conceptual and operational platforms in NDT and SHM to be transferred to industry. Example of PEGASE Platform : a Generic Wireless Platform embeding a Linux-inside operating system to adress many use-cases in Civil Engeeniring or SACHEMS : SAClay High-end Equipment for the Monitoring of Structures. The focus of this PhD regards Wireless Sensor Network for wich the scientific locks are identified. For example : in a recent PhD we adressed the way to save energy on PEGASE platform while keeping a deterministic level of time synchronization based on a GPS module (~120 mW of power) maitained turned off as long as possible ; we prooved the ability, for instance to keep an power consumption under 10 mW while keeping wirelessly synchronized up to 1 µs. In an another recent PhD, we used orginal designed of aero-piezo electric harvester to extract energy from small wind turbulences. For instance, with a small aero-piezo (320 µm on 2.2 cm) we harvest up to tens of Volts with a wind speed variation under 6 m /sec. In a general way a clear roadmap is written about what should be an efficient self-powered sensor in SHM configurations.

Keywords: Wireless Sensor Network (WSN), Energy Embeded Instrumentation

Research field: Electrical engineering

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