Magnetic Resonance-Based Wireless Power Transmission through Concrete Structures

Kim, Ji-Min; Han, Minseok; Sohn, Hoon

doi:2015.15.2.104

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

Abstract

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