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Sensors 2014, 14(1), 1691-1704; doi:10.3390/s140101691
Article

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

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Received: 29 October 2013; in revised form: 11 December 2013 / Accepted: 9 January 2014 / Published: 17 January 2014
(This article belongs to the Section Physical Sensors)
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Abstract: 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 µm) and a large dynamic range (over 7 mm), along with high levels of linearity (R2 > 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.
Keywords: displacement sensor; metamaterial; structural health monitoring displacement sensor; metamaterial; structural health monitoring
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ozbey, B.; Unal, E.; Ertugrul, H.; Kurc, O.; Puttlitz, C.M.; Erturk, V.B.; Altintas, A.; Demir, H.V. Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring. Sensors 2014, 14, 1691-1704.

AMA Style

Ozbey B, Unal E, Ertugrul H, Kurc O, Puttlitz CM, Erturk VB, Altintas A, Demir HV. Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring. Sensors. 2014; 14(1):1691-1704.

Chicago/Turabian Style

Ozbey, Burak; Unal, Emre; Ertugrul, Hatice; Kurc, Ozgur; Puttlitz, Christian M.; Erturk, Vakur B.; Altintas, Ayhan; Demir, Hilmi V. 2014. "Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring." Sensors 14, no. 1: 1691-1704.



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