광대역 압전 에너지 하베스팅 기술

• 영문명: Broadband Piezoelectric Energy Harvesting Technology
• 발행기관: 한국세라믹학회
• 저자명: 이동규(Dong-Gyu Lee) 이연정(Yeon-Jeong Yee) 송현철(Hyun-Cheol Song)
• 간행물 정보: 『세라미스트』제22권 제1호, 56~69쪽, 전체 14쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2019.03.30

영문 초록

Recent advances in low-power sensors and transmitters are driving the search for standalone power sources that utilize unused ambient energy. These energy harvesters can alleviate the issues related to the installation and maintenance of sensors. Particularly piezoelectric energy harvesters, with the ability to convert ambient mechanical energy into useful electricity, have received significant attention due to their high energy density, low cost and operational stability over wide temperature and pressure conditions. In order to maximize the generated electrical power, the natural frequency of the piezoelectric energy harvester should be matched with the dominant frequency of ambient vibrations. However, piezoelectric energy harvesters typically exhibit a narrow bandwidth, thus, it becomes difficult to operate near resonance under broadband ambient vibration conditions. Therefore, the resonating of energy harvesters is critical to generate maximum output power under ambient vibration conditions. For this, energy harvesters should have broadband natural frequency or actively tunable natural frequency with ambient vibrations. Here, we review the most plausible broadband energy harvesting techniques of the multi-resonance, nonlinearity, and self-resonance tuning. The operation mechanisms and recent representative studies of each technique are introduced and the advantages and disadvantages of each method are discussed. In addition, we look into the future research direction for the broadband energy harvester.

목차

1. 서론

2. 다중 공진을 이용한 광대역 에너지 하베스팅

3. 비선형 강성을 이용한 광대역 에너지 하베스팅

4. 자가 공진 튜닝 방법을 이용한 광대역 에너지 하베스팅

5. 맺음말

참고문헌

키워드

Piezoelectric energy harvesting Broadband resonance Multimodal Nonlinearity Self-resonance tuning