High‐Sensitivity RFID Sensor for Structural Health Monitoring

• DOI: 10.1002/advs.202301807
• Publication Date: 2023-07-06T02:46:43Z
• Authors: Hussein Nesser; Hassan A. Mahmoud; Gilles Lubineau
• Keywords: Structural Health Monitoring; Piezoresistive effect; Strain gauge

Structural health monitoring (SHM) is crucial for ensuring operational safety in applications like pipelines, tanks, aircraft, ships, and vehicles. Traditional embedded sensors have limitations due to expense potential structural damage. A novel technology using radio frequency identification devices (RFID) offers wireless transmission of highly sensitive strain measurement data. The system features a thin, flexible sensor based on an inductance-capacitance (LC) circuit with parallel-plate capacitance sensing unit. By incorporating tailored cracks the capacitor electrodes, sensor's electrodes become piezoresistive, modifying electromagnetic wave penetration. This unconventional change shifts resonance frequency, resulting gauge factor 50 strains under 1%. shift passively detected through external readout simple sweeping. wire-free, power-free design allows easy integration into composites without compromising integrity. Experimental results demonstrate cracked ability detect small within composites. cost-effective, non-destructive solution accurate monitoring.