Operation of battery-less and wireless sensor using magnetic resonance based wireless power transfer through concrete

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Although the deployment of wireless sensors for structural sensing and monitoring is becoming popular, supplying power to these sensors remains as a daunting task. To address this issue, there have been large volume of ongoing energy harvesting studies that aimed to fmd a way to scavenge energy from surrounding ambient energy sources such as vibration, light and heat. In this study, a magnetic resonance based wireless power transfer (MR-WPT) system is proposed so that sensors inside a concrete structure can be wirelessly powered by an external power source. MR-WPT system offers need-based active power transfer using an external power source, and allows wireless power transfer through 300-mm thick reinforced concrete with 21.34% and 17.29% transfer efficiency at distances of 450 mm and 500 mm, respectively. Because enough power to operate a typical wireless sensor can be instantaneously transferred using the proposed MR-WPT system, no additional energy storage devices such as rechargeable batteries or supercapacitors are required inside the wireless sensor, extending the expected life-span of the sensor
Publisher
TECHNO-PRESS
Issue Date
2016-04
Language
English
Article Type
Article
Keywords

FATIGUE-CRACK DETECTION; TRANSFER SYSTEM; HIGH-EFFICIENCY; NETWORK; MODULATION; AMPLIFIERS

Citation

SMART STRUCTURES AND SYSTEMS, v.17, no.4, pp.631 - 646

ISSN
1738-1584
DOI
10.12989/sss.2016.17.4.631
URI
http://hdl.handle.net/10203/209345
Appears in Collection
CE-Journal Papers(저널논문)
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