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Qingying REN, Yuxuan LIU, Debo WANG, “Research on Low-frequency Multi-directional Piezoelectric Energy Harvester with Combined Cantilever Beam,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–9, xxxx doi: 10.23919/cje.2023.00.351
Citation: Qingying REN, Yuxuan LIU, Debo WANG, “Research on Low-frequency Multi-directional Piezoelectric Energy Harvester with Combined Cantilever Beam,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–9, xxxx doi: 10.23919/cje.2023.00.351

Research on Low-frequency Multi-directional Piezoelectric Energy Harvester with Combined Cantilever Beam

doi: 10.23919/cje.2023.00.351
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  • Author Bio:

    Qingying REN was born in China in 1987. She received the Ph.D. degree from Southeast University, Nanjing, China, in 2017, in Microelectronics and Solid State Electronics. She is currently a lecturer at the College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, China. The discipline of her research focuses on energy harvesting technology, MEMS sensor, temperature and humidity sensors, LC passive wireless sensors

    Yuxuan LIU was born in China in 2005. She studies at Nanjing University of Posts and Telecommunications for his undergraduate degree. Her interest is piezoelectric energy harvesting technology

    Debo WANG was born in China in 1983. He received the B.S. degree in electronic science and technology from the Hebei University of Science and technology, Shijiazhuang, China, in 2007, the M.S. degree and the PhD degree in Key Laboratory of MEMS of the Ministry of Education from the southeast university, Nanjing, China, in 2010 and 2012. He is now a post-doctor in Nanjing University and an associate professor of the Nanjing University of Posts and Telecommunication. The discipline of his research focuses on the RF MEMS devices, particularly on microwave power sensor and its package. (Email: wdb@njupt.edu.cn)

  • Corresponding author: Email: wdb@njupt.edu.cn
  • Received Date: 2023-11-05
    Available Online: 2024-03-12
  • In order to realize the collection and utilization of low-frequency vibration energy, a multi-directional piezoelectric energy harvester is proposed, which consists of a lower circular arc beam and an upper L-shaped beam. Both the lower and upper beams can achieve multi-directional energy harvesting, and the upper L-shaped beam can also act as a mass block to reduce the resonant frequency. The structure of this energy harvester is optimized. Four different structures are studied with varying combination angles between the upper and lower layers to acquire data related to resonant frequency, vibration shape, stress distribution, open-circuit voltage and output power. Additionally, the performance of each structure is comprehensively prepared and measured to verify its effectiveness. The optimal structure achieved a resonant frequency of 11 Hz and an output power of 57.1 μW at the optimal load resistance of 201 kΩ. Consequently, this work provides valuable reference for the study of low-frequency vibration energy harvesting technology.
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