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Structural Monitoring and Maintenance Volume 4, Number 4, December 2017 , pages 301-329 DOI: https://doi.org/10.12989/smm.2017.4.4.301 |
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Advances and challenges in impedance-based structural health monitoring |
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Thanh-Canh Huynh, Ngoc-Loi Dang and Jeong-Tae Kim
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| Abstract | ||
| Impedance-based damage detection method has been known as an innovative tool with various successful implementations for structural health monitoring of civil structures. To monitor the local critical area of a structure, the impedance-based method utilizes the high-frequency impedance responses sensed by piezoelectric sensors as the local dynamic features. In this paper, current advances and future challenges of the impedance-based structural health monitoring are presented. Firstly, theoretical background of the impedance-based method is outlined. Next, an overview is given to recent advances in the wireless impedance sensor nodes, the interfacial impedance sensing devices, and the temperature-effect compensation algorithms. Various research works on these topics are reviewed to share up-to-date information on research activities and implementations of the impedance-based technique. Finally, future research challenges of the technique are discussed including the applicability of wireless sensing technology, the predetermination of effective frequency bands, the sensing region of impedance responses, the robust compensation of noise and temperature effects, the quantification of damage severity, and long-term durability of sensors. | ||
| Key Words | ||
| impedance responses; wireless impedance sensor; PZT interface; temperature effect; damage detection; structural health monitoring | ||
| Address | ||
| Thanh-Canh Huynh, Ngoc-Loi Dang and Jeong-Tae Kim:Department of Ocean Engineering, Pukyong National University, 599-1 Daeyon-3dong, Nam-gu, Busan 608-737, Republic of Korea | ||
