SENSING OF DEFORMATIONS THROUGH GRIDS OF ANTENNAS

Abstract

In the present contribution, RFID tags will be thought of not only as radiotransponders, but also as sensors, capable of monitoring their mutual distance and, hence, the strain occurring in an engineering structure. The envisaged system is hence composed by a grid of RFID antennas (tags) properly placed over the structure and by a remote reader device, which wirelessly powers the sensing antennas and collects their responses. The processing of the retrieved signals from each antenna of the grid will provide an aggregated information about the deformation of the grid itself, which if compared to a reference condition, will yield the displacement that the structure has undergone.