• 전기의세계
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• v.63 no.9
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• pp.18-22
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• 2014

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.06a
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• pp.166-166
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• 2009

에너지 하베스팅 소자용 압전 적층체를 제작하고 이에 대한 성능을 조사하였다. 최근 대부분 소형 소자들을 구동하는데 있어서 이에 필요한 소비 전력은 최소한 10~20 mW 이다. 이에 적합한 mm 크기의 압전 소자를 제작하고 외부 금속 기구물을 연결한 하베스팅 소자를 제작하였다. 이러한 소자의 공진 주파수를 120 Hz로 정하고 이에 적합한 무게추를 설정하였다. 120 Hz에서 1 g 가속도로 외부에서 진동을 가했을 때, 소자는 5 V, 20 mW의 전력을 발생하였다. 또한 이러한 소자에서 발생된 전력을 저장하기 위하여 간단한 정류 및 저장 장치를 제작하였다. 회로 제작시 압전 소자의 임피던스가 매우 적으므로 이에 적합하게 임피던스 매칭을 고려한 저 임피던스 회로를 제작하였으며, 이 회로는 약 80%의 효율을 나타내었다.

• Ceramist
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• v.18 no.4
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• pp.22-26
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• 2015

• Electrical & Electronic Materials
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• v.32 no.3
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• pp.18-23
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• 2019

• Journal of the Korean Regional Science Association
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• v.33 no.3
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• pp.49-59
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• 2017

The piezoelectric energy harvester is recently being developed and catching on as a way to achieve low carbon green growth. The practical application of the piezoelectric energy harvester is expected to contribute not only to the reduction of greenhouse gas emissions but also to the improvement of residents' welfare. This paper conducted a cost-benefit analysis for the installation of piezoelectric energy harvester on the highway focusing on its impacts on the public. The results showed that the installation of piezoelectric energy harvester on the gyeongbu highway is economically feasible in that it could increase the social welfare for the residents. Finally, this paper suggests policy direction for the practical use of the piezoelectric energy harvester, based on the results obtained.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.7
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• pp.867-872
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• 2010

Unused energy derived from sources in nature can be captured and stored for future use, for example, to recharge a battery or power a device; this process of capturing and storing energy is called energy harvesting. Extensive investigations are being carried out in order to use piezoelectricity to harvest the energy generated by body movements or machine vibrations. This paper presents a simple analytical model that describes the output voltage effectiveness of a Piezocomposite Generating Element (PCGE) from vibration and its experimental verification. PCGE is composed of carbon/epoxy, PZT, and glass/epoxy layers. During the manufacturing process, the stacked layers were cured at $177^{\circ}C$ in an autoclave, which created residual stresses in PCGE and altered the piezoelectric properties of the PZT layer. In the experiments, three kinds of lay-up configurations of PCGE were considered to verify the proposed prediction model and to investigate its capability to convert oscillatory mechanical energy into electrical energy. The predicted performance results are in good agreement with observed experimental ones.

• Electrical & Electronic Materials
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• v.29 no.3
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• pp.24-31
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• 2016

• Ceramist
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• v.18 no.4
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• pp.5-12
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• 2015

• Electrical & Electronic Materials
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• v.29 no.2
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• pp.31-36
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• 2016

• Electrical & Electronic Materials
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• v.27 no.3
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• pp.3-10
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• 2014