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J. Electromagn. Eng. Sci > Volume 15(2); 2015 > Article
Journal of Electromagnetic Engineering and Science 2015;15(2):104-110.
DOI: https://doi.org/10.5515/JKIEES.2015.15.2.104   
Magnetic Resonance-Based Wireless Power Transmission through Concrete Structures
Ji-Min Kim1, Minseok Han2, Hoon Sohn1
1Department of Civil and Environmental Engineering, KAIST
2Center for Integrated Smart Sensors, KAIST
As civil infrastructures continue to deteriorate, the demand for structural health monitoring (SHM) has increased. Despite its outstanding capability for damage identification, many conventional SHM techniques are restricted to huge structures because of their wired system for data and power transmission. Although wireless data transmission using radio-frequency techniques has emerged vis-$grave{a}$-vis wireless sensors in SHM, the power supply issue is still unsolved. Normal batteries cannot support civil infrastructure for no longer than a few decades. In this study, we develop a magnetic resonance-based wireless power transmission system, and its performance is validated in three different mediums: air, unreinforced concrete, and reinforced concrete. The effect of concrete and steel rebars is analyzed.
Key words: Magnetic Resonance, Reinforced Concrete, Structural Health Monitoring, Wireless Power Transmission


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