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Sensors 2014, 14(10), 19354-19370; doi:10.3390/s141019354

Detection of Surface and Subsurface Cracks in Metallic and Non-Metallic Materials Using a Complementary Split-Ring Resonator

Electrical and Computer Engineering Department, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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Received: 22 July 2014 / Revised: 22 September 2014 / Accepted: 29 September 2014 / Published: 16 October 2014
(This article belongs to the Section Physical Sensors)
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Abstract

Available microwave techniques for crack detection have some challenges, such as design complexity and working at a high frequency. These challenges make the sensing apparatus design complex and relatively very expensive. This paper presents a simple method for surface and subsurface crack detection in metallic and non-metallic materials based on complementary split-ring resonators (CSRRs). A CSRR sensor can be patterned on the ground plane of a microstrip line and fabricated using printed circuit board technology. Compared to available microwave techniques for sub-millimeter crack detection, the methods presented here show distinct advantages, such as high spatial resolution, high sensitivity and design simplicity. The response of the CSRR as a sensor for crack detection is studied and analysed numerically. Experimental validations are also presented. View Full-Text
Keywords: crack detection; complementary split-ring resonator (CSRR); microstrip linetechnology; near-field detection; metamaterials crack detection; complementary split-ring resonator (CSRR); microstrip linetechnology; near-field detection; metamaterials
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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. (CC BY 4.0).

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MDPI and ACS Style

Albishi, A.; Ramahi, O.M. Detection of Surface and Subsurface Cracks in Metallic and Non-Metallic Materials Using a Complementary Split-Ring Resonator. Sensors 2014, 14, 19354-19370.

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