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Title: Wireless measurement of elastic and plastic deformation by a metamaterial-based sensor
Authors: Ozbey, Burak
Demir, Hilmi Volkan
Kurc, Ozgur
Erturk, Vakur
Altintas, Ayhan
Keywords: DRNTU::Science::Physics::Weights and measures
Issue Date: 2014
Source: Ozbey, B., Demir, H., Kurc, O., Erturk, V., & Altintas, A. (2014). Wireless measurement of elastic and plastic deformation by a metamaterial-based sensor. Sensors,14(10), 19609-19621.
Series/Report no.: Sensors
Abstract: We report remote strain and displacement measurement during elastic and plastic deformation using a metamaterial-based wireless and passive sensor. The sensor is made of a comb-like nested split ring resonator (NSRR) probe operating in the near-field of an antenna, which functions as both the transmitter and the receiver. The NSRR probe is fixed on a standard steel reinforcing bar (rebar), and its frequency response is monitored telemetrically by a network analyzer connected to the antenna across the whole stress-strain curve. This wireless measurement includes both the elastic and plastic region deformation together for the first time, where wired technologies, like strain gauges, typically fail to capture. The experiments are further repeated in the presence of a concrete block between the antenna and the probe, and it is shown that the sensing system is capable of functioning through the concrete. The comparison of the wireless sensor measurement with those undertaken using strain gauges and extensometers reveals that the sensor is able to measure both the average strain and the relative displacement on the rebar as a result of the applied force in a considerably accurate way. The performance of the sensor is tested for different types of misalignments that can possibly occur due to the acting force. These results indicate that the metamaterial-based sensor holds great promise for its accurate, robust and wireless measurement of the elastic and plastic deformation of a rebar, providing beneficial information for remote structural health monitoring and post-earthquake damage assessment.
ISSN: 1424-8220
DOI: 10.3390/s141019609
Rights: © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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