Efficient self-powered energy harvesting circuit designs

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K11227
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 60040:Computer system-related
• Research Institution: Waseda University
• Principal Investigator: SHI Youhua 早稲田大学, 理工学術院, 教授 (70409655)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: Energy Harvesting

Outline of Final Research Achievements

Research and development on efficient energy harvesting (EH) interface circuit designs have been conducted for piezoelectric energy harvesting from our human body. The main achievements can be summarized as follows: (1) Efficient EH interface circuit designs have been proposed by implementing a multiple bias-flip-based E-SECE circuit and scalable EH circuit optimization for multi-source piezoelectric energy harvesting, (2) A wideband design technique with introduced switching delay is proposed for power and frequency bandwidth improvement in piezoelectric energy harvesting, and (3) A wearable device capable of battery-free wireless transmission is successfully realized by using the proposed Piezo-based EH interface circuit.

Free Research Field

電子工学

Academic Significance and Societal Importance of the Research Achievements

本研究は、人体の振動を用いた電力効率の良いEH回路を実現した。人体の動きから生成された微弱なエネルギーを効率よくハーベスティングすることができれば、どこでもいつでも自由にエネルギーを得ることが可能になる。本研究の成果により、将来的なバッテリーフリーウェアラブルデバイスの実現は可能と考えられる。さらに、EH技術を実現可能な応用を見据えながら確立し、バッテリーフリーIoTが実現されれば、様々な社会問題の解決につながると期待される。