Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring

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Date

2014-01-01

Author

Ozbey, Burak
Unal, Emre
Ertugrul, Hatice
Kurç, Özgür
Puttlitz, Christian M.
ERTÜRK, VAKUR BEHÇET
ALTINTAŞ, AYHAN
DEMİR, Hilmi Volkan

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We propose and demonstrate a wireless, passive, metamaterial-based sensor that allows for remotely monitoring submicron displacements over millimeter ranges. The sensor comprises a probe made of multiple nested split ring resonators (NSRRs) in a double-comb architecture coupled to an external antenna in its near-field. In operation, the sensor detects displacement of a structure onto which the NSRR probe is attached by telemetrically tracking the shift in its local frequency peaks. Owing to the NSRR's near-field excitation response, which is highly sensitive to the displaced comb-teeth over a wide separation, the wireless sensing system exhibits a relatively high resolution (<1 mu m) and a large dynamic range (over 7 mm), along with high levels of linearity (R-2 > 0.99 over 5 mm) and sensitivity (>12.7 MHz/mm in the 1-3 mm range). The sensor is also shown to be working in the linear region in a scenario where it is attached to a standard structural reinforcing bar. Because of its wireless and passive nature, together with its low cost, the proposed system enabled by the metamaterial probes holds a great promise for applications in remote structural health monitoring.

Subject Keywords

Structural health monitoring, Metamaterial, Displacement sensor

URI

https://hdl.handle.net/11511/46790

Journal

SENSORS

DOI

https://doi.org/10.3390/s140101691

Collections

Department of Civil Engineering, Article

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Citation Formats

B. Ozbey et al., “Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring,” SENSORS, pp. 1691–1704, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46790.