Frequency-locked Wireless Multifunctional Surface Acoustic Wave Sensors.

ABSTRACT: Surface acoustic waves (SAWs) have shown great potential for developing sensors for structural health monitoring (SHM) and lab-on-a-chip (LOC) applications. Existing SAW sensors mainly rely on measuring the frequency shifts of high-frequency (e.g., >0.1 GHz) resonance peaks. This study presents frequency-locked wireless multifunctional SAW sensors that enable multiple wireless sensing functions, including strain sensing, temperature measurement, water presence detection, and vibration sensing. Our sensors leverage SAW resonators on piezoelectric chips, inductive coupling-based wireless power transmission, and, particularly, a frequency-locked wireless sensing mechanism that works at low frequencies (e.g., <0.1 GHz). This mechanism locks the input frequency on the slope of a s

SUBMITTER: Bo L 

PROVIDER: S-EPMC11841837 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature