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Sensors 2015, 15(4), 9078-9096;

Application of Micro-Electro-Mechanical Sensors Contactless NDT of Concrete Structures

Department of Civil and Environmental Engineering, The University of Illinois at Urbana-Champaign, 205 N. Mathews Ave, MC-250, Urbana, IL 61801, USA
Author to whom correspondence should be addressed.
Academic Editor: Thomas Schumacher
Received: 7 January 2015 / Revised: 5 April 2015 / Accepted: 8 April 2015 / Published: 17 April 2015
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The utility of micro-electro-mechanical sensors (MEMS) for application in air-coupled (contactless or noncontact) sensing to concrete nondestructive testing (NDT) is studied in this paper. The fundamental operation and characteristics of MEMS are first described. Then application of MEMS sensors toward established concrete test methods, including vibration resonance, impact-echo, ultrasonic surface wave, and multi-channel analysis of surface waves (MASW), is demonstrated. In each test application, the performance of MEMS is compared with conventional contactless and contact sensing technology. Favorable performance of the MEMS sensors demonstrates the potential of the technology for applied contactless NDT efforts. Objective: To illustrate the utility of air-coupled MEMS sensors for concrete NDT, as compared with conventional sensor technology. View Full-Text
Keywords: air-coupled; impact-echo; MEMS; ultrasound air-coupled; impact-echo; MEMS; ultrasound

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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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Ham, S.; Popovics, J.S. Application of Micro-Electro-Mechanical Sensors Contactless NDT of Concrete Structures. Sensors 2015, 15, 9078-9096.

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