Multi-point single-antenna sensing enabled by wireless nested split-ring resonator sensors
Ertürk, V. B.
Demir, Hilmi Volkan
IEEE Sensors Journal
Institute of Electrical and Electronics Engineers Inc.
7744 - 7752
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In this paper, simultaneous multi-point wireless sensing is proposed and demonstrated via multiple sensors in nested split-ring resonator (NSRR) geometry coupled to a single illuminator antenna. In this passive multi-point sensing system, each probe in the sensor array is assigned a non-overlapping spectral interval for frequency shift in response to local mechanical loading around a unique operating resonance frequency in the band of the antenna. Here, it is shown that the antenna is capable of capturing the responses from all probes in a single frequency sweep. Furthermore, the inter-coupling between the array elements and the effect of antenna illumination on the coupling are experimentally investigated in a systematic way. In addition, as a proof-of-concept real-life application in structural health monitoring, two NSRR sensors are located inside a concrete beam to monitor the strain forming on reinforcing bars, and this dual-probe system is demonstrated to record strain simultaneously via both of the embedded probes.
Nested split ring resonator (NSRR)
Structural health monitoring (SHM)
Wireless passive sensor
Published Version (Please cite this version)http://dx.doi.org/10.1109/JSEN.2016.2604020
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