2014/09/26 by Stefano Caizzone, Emidio DiGiampaolo, Gaetano Marrocco · 68 citations
Engineering · #Acoustics #Amplitude #Antenna (radio) #Computer science #Coupling (piping) #Displacement (psychology) #Electrical engineering #Electronic engineering #Engineering #Mechanical engineering #Millimeter #Non-Destructive Testing Techniques #Optics #Phase (matter) #Physics #Radio frequency #Radio-frequency identification #Sensitivity (control systems) #Structural Health Monitoring Techniques #Structural health monitoring #Telecommunications #Ultrasonics and Acoustic Wave Propagation #Wireless
paper · doi:10.1109/tap.2014.2360553
published in IEEE Transactions on Antennas and Propagation 62(12), 6412-6419 (IEEE Antennas & Propagation Society)
openalex publication_date 2014/09/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The possibility to wirelessly monitor the state and the evolution of cracks is of increasing interest in emerging structural health monitoring systems. A simple and effective measurement method considers the placement of two passive radio frequency identification (RFID) antennas on top of the crack, so that the crack's evolution will produce a change of the inter-antenna coupling and in turn of the phase of the backscattered field. An ad-hoc design technique, based onto the coupled-modes physics, permits to maximize the sensor's sensitivity avoiding, or at least mitigating, the read range reduction during the evolution of the displacement that is instead typical of amplitude-oriented RFID displacement sensors. The proposed idea is demonstrated by numerical and experimental examples showing the possibility of sub-millimeter resolution with low-cost devices.