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A Review of the Piezoelectric Electromechanical Impedance Based Structural Health Monitoring Technique for Engineering Structures

Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology, Gyeonggi-Do 10223, Korea
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Sensors 2018, 18(5), 1307; https://doi.org/10.3390/s18051307
Received: 13 February 2018 / Revised: 10 April 2018 / Accepted: 19 April 2018 / Published: 24 April 2018
(This article belongs to the Special Issue Piezoelectric Micro- and Nano-Devices)
The birth of smart materials such as piezoelectric (PZT) transducers has aided in revolutionizing the field of structural health monitoring (SHM) based on non-destructive testing (NDT) methods. While a relatively new NDT method known as the electromechanical (EMI) technique has been investigated for more than two decades, there are still various problems that must be solved before it is applied to real structures. The technique, which has a significant potential to contribute to the creation of one of the most effective SHM systems, involves the use of a single PZT for exciting and sensing of the host structure. In this paper, studies applied for the past decade related to the EMI technique have been reviewed to understand its trend. In addition, new concepts and ideas proposed by various authors are also surveyed, and the paper concludes with a discussion of the potential directions for future works. View Full-Text
Keywords: structural health monitoring; piezoelectric transducers; electromechanical impedance; non-destructive testing; impedance-based health monitoring structural health monitoring; piezoelectric transducers; electromechanical impedance; non-destructive testing; impedance-based health monitoring
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Na, W.S.; Baek, J. A Review of the Piezoelectric Electromechanical Impedance Based Structural Health Monitoring Technique for Engineering Structures. Sensors 2018, 18, 1307.

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