Wireless flexible strain sensor based on Carbon Nanotube piezoresistive networks for embedded measurement of strain in concrete

F. Michelis, B. Lebental, C.-S. Cojocaru, J.-L. Sorin, Y. Bonnassieux
IFSTTAR, FR

Keywords: carbon nanotube sensor structural health monitoring RFID flexible

Summary:

In the field of Structural Health Monitoring, there is growing interest in continuous volume measurements of material properties using embedded sensors organized in wireless sensor networks. In this work we propose a novel, highly reproducible piezoresistive sensor based on Carbon Nanotube (CNT) networks deposited on polymer to be used for embedded strain monitoring and crack detection in concrete. We highlight the originality of the fabrication process and describe the modalities for signal conditioning and for integration into a RFID-based wireless sensor network.