Wireless sensing in complex electromagnetic media: construction materials and structural monitoring
Author
Özbey, B.
Demir, Hilmi Volkan
Kurc, O.
Ertürk, V. B.
Altıntaş, A.
Date
2015Source Title
IEEE Sensors Journal
Print ISSN
1530-437X
Publisher
Institute of Electrical and Electronics Engineers Inc.
Volume
15
Issue
10
Pages
5545 - 5554
Language
English
Type
ArticleItem Usage Stats
164
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Abstract
In this paper, wireless sensing in the presence of complex electromagnetic media created by combinations of reinforcing bars and concrete is investigated. The wireless displacement sensing system, primarily designed for use in structural health monitoring (SHM), is composed of a comb-like nested split-ring resonator (NSRR) probe and a transceiver antenna. Although each complex medium scenario is predicted to have a detrimental effect on sensing in principle, it is demonstrated that the proposed sensor geometry is able to operate fairly well in all scenarios except one. In these scenarios that mimic real-life SHM, it is shown that this sensor exhibits a high displacement resolution of 1 μm, a good sensitivity of 7 MHz/mm in average, and a high dynamic range extending over 20 mm. For the most disruptive scenario of placing concrete immediately behind NSRR, a solution based on employing a separator behind the probe is proposed to overcome the handicaps introduced by the medium. In order to obtain a one-to-one mapping from the measured frequency shift to the displacement, a numerical fit is proposed and used. The effects of several complex medium scenarios on this fit are discussed. These results indicate that the proposed sensing scheme works well in real-life SHM applications. © 2001-2012 IEEE.
Keywords
Complex mediumConcrete
Displacement sensor
Nested split ring resonator (NSRR)
Reinforcing bar (rebar)
Strain sensor
Structural health monitoring (SHM)
Wireless passive sensor
Bars (metal)
Concrete placing
Concretes
Optical resonators
Probes
Radio transceivers
Reinforced concrete
Reinforcement
Resonators
Ring gages
Complex medium
Displacement sensor
Passive sensor
Reinforcing bar
Split ring resonator
Strain sensors
Structural health monitoring (SHM)
Permalink
http://hdl.handle.net/11693/20892Published Version (Please cite this version)
http://dx.doi.org/10.1109/JSEN.2015.2441555Collections
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