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Communication Dans Un Congrès Année : 2016

SHM and NDT techniques at IFSTTAR; applications on Civil Engineering structures monitoring. Challenges and new trends on wireless, smart and embedded sensors

Vincent Le Cam

Résumé

IFSTTAR represents the French national research institute on civil engineering structures transportation equipments from their design to their maintenance. Structural Health Monitoring is understood as the way to monitor strategic structures (bridges, tunnels, railways, power plant, etc.) to improve their capacities, to better understand and predict their behaviour (collapse/ failure, maintenance, specific works…). Hand by hand with structures managers, IFSTTAR produces SHM solutions that consists, most of the time, in a sum of technical device (sensors, acquisition equipment…) added to specific algorithms and knowledge. Several of those NDT / SHM techniques will be detailed in following presentation : acoustic monitoring of cable, Fiber Optic as embeded sensor, Modal analysis monitoring, ... In particular, the topic of Wireless and Smart Sensors Networks is subject of many research and developments to make it possible to easily deploy numerous sensors on civil structures where distances are quite long and for wich full wired instrumentations represent a source of cost and disturbances. The other goal is to bring closer data sampling to data processing; reducing the amount of produced data to be computed at central Supervision level. Even if related electronic technologies have made great advances those last years regarding: energy consuming and energy harvesting, integration, MEMs and nano sensors, wireless protocoles, etc., many challenges still have to be adressed or performed in Wireless Sensor world. IFSTTAR Wireless knowledge will be presented trough its PEGASE platform ( a generic wireless acquisition system) and some praticals applications of this platform applied in SHM use-cases. Among others, new trends and challenges in WSN for SHM on which Ifsttar keep an eye on, will be mentioned:  specifically the need of solutions to make data moving from a local WSN netwotk (i.e. LAN) to internet (WAN)  challenge of Wireless sensors synchronization. As far as most of collected data in the world have to be time-stamped to be computed by models, the question is how to get a common time-base in a wireless network of sensors ?  Lifetime of electronic devices vs lifetime of structures to be monitored: how to face elecronic aging (battery, quartz..) ? How to ensure a self-control ?  Does emerging Big data represent an opportunity or a weakness for structures managers ?
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hal-04483614 , version 1 (29-02-2024)

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  • HAL Id : hal-04483614 , version 1

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Vincent Le Cam. SHM and NDT techniques at IFSTTAR; applications on Civil Engineering structures monitoring. Challenges and new trends on wireless, smart and embedded sensors. CEFIPRA Indo-French Seminar on Smart Systems and SHM (Structural Health Monitoring) for structures under Harsh Environments, CEFIPRA, Jan 2016, Pondicherry, India. ⟨hal-04483614⟩
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