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학술지 Self-Powered Autonomous Wireless Sensor Node by Using Silicon-Based 3D Thermoelectric Energy Generator for Environmental Monitoring Application
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저자
임종필, 김정훈, 이재우, 우지용, 임솔이, 김예리아론, 엄용성, 최원철, 김준수, 문승언
발행일
202002
출처
Energies, v.13 no.3, pp.1-17
ISSN
1996-1073
출판사
MDPI
DOI
https://dx.doi.org/10.3390/en13030674
협약과제
20PB1700, 고상 전자냉각용 다결정 열전소재 개발, 문승언
초록
In this paper, we present the results of a preliminary study on the self-powered autonomous wireless sensor node by using thermoelectric energy generator based on Silicon (Si) thermoelectric legs, energy management integrated circuit (EMIC), Radio Frequency (RF) module with a temperature and humidity sensor, etc. A novel thermoelectric module structure is designed as an energy generator module, which consists of 127 pairs of Silicon legs and this module is fabricated and tested to demonstrate the feasibility of generating electrical power under the temperature gradient of 70K. EMIC has three key features besides high efficiency, which are maximum power point tracking (MPPT), cold start, and complete self-power operation. EMIC achieved a cold start voltage of 200 mV, peak efficiency of 78.7%, MPPT efficiency 99.4%, and an output power of 34 mW through only the Thermoelectric Generator (TEG) source. To assess the capability of the device as a small scale power source for internet of things (IoT) service, we also tested energy conversion and storage experiments. Finally, the proposed sensor node system which can transmit and monitor the information from the temperature and humidity sensor through the RF module in real time demonstrates the feasibility for variable applications.
키워드
EMIC, Energy generator, Hetero-structure, Si, Thermoelectric
KSP 제안 키워드
Cold-start, Electrical power, Environmental monitoring, Integrated circuit, Internet of thing(IoT), Key features, MPPT efficiency, Maximum Power Point Tracking(MPPT), Module structure, Monitoring applications, Node system