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Sensors 2016, 16(2), 234; doi:10.3390/s16020234

Detection and Inspection of Steel Bars in Reinforced Concrete Structures Using Active Infrared Thermography with Microwave Excitation and Eddy Current Sensors

1
Szczecin Department of Electrical and Computer Engineering, West Pomeranian University of Technology, ul. Sikorskigo 37, Szczecin 70-313, Poland
2
Department of Nanosciences and Technology, School of Science and Humanities, Karunya University, Coimbatore, Tamilnadu 641114, India
*
Authors to whom correspondence should be addressed.
Academic Editor: Piervincenzo Rizzo
Received: 24 December 2015 / Revised: 1 February 2016 / Accepted: 8 February 2016 / Published: 16 February 2016
(This article belongs to the Section Physical Sensors)
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Abstract

The purpose of this paper is to present a multi-sensor approach to the detection and inspection of steel bars in reinforced concrete structures. In connection with our past experience related to non-destructive testing of different materials, we propose using two potentially effective methods: active infrared thermography with microwave excitation and the eddy current technique. In this article active infrared thermography with microwave excitation is analyzed both by numerical modeling and experiments. This method, based on thermal imaging, due to its characteriatics should be considered as a preliminary method for the assessment of relatively shallowly located steel bar reinforcements. The eddy current technique, on the other hand, allows for more detailed evaluation and detection of deeply located rebars. In this paper a series of measurement results, together with the initial identification of certain features of steel reinforcement bars will be presented. View Full-Text
Keywords: infrared thermography; microwave heating; eddy current testing; multi frequency eddy current technique; concrete testing; rebar detection infrared thermography; microwave heating; eddy current testing; multi frequency eddy current technique; concrete testing; rebar detection
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

Szymanik, B.; Frankowski, P.K.; Chady, T.; John Chelliah, C.R.A. Detection and Inspection of Steel Bars in Reinforced Concrete Structures Using Active Infrared Thermography with Microwave Excitation and Eddy Current Sensors. Sensors 2016, 16, 234.

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