Journal
NANO ENERGY
Volume 85, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105962
Keywords
Triboelectric nanogenerator; Self-powered sensing; Acoustic energy harvesting; Quarter-wavelength acoustic resonator; Edge sensing
Categories
Funding
- National Natural Science Foundation of China [61701250, 61974071, 61601394]
- State Key Laboratory of Mechanical System and Vibration [MSV202018]
- Jiangsu Shuangchuang Talent Program
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [YX030003]
- StartUp Fund from Nanjing University of Posts and Telecommunications [NY218151, NY218157]
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This work introduces a 3D-printed acoustic triboelectric nanogenerator for high-performance energy harvesting, capable of driving LEDs and calculators. Additionally, a self-powered edge sensing system is developed for real-time speech recognition, demonstrating great potential in the field of low-power and cost-effective intelligent Internet of Things.
Low-frequency acoustic energy harvesting is of great significance in the academic field and industry. In this work, we propose a 3D-printed acoustic triboelectric nanogenerator (A-TENG) with the properties of structural controllability, one-time molding, easy fabrication, and low cost. A quarter-wavelength acoustic resonator system based on the A-TENG is demonstrated and systemically investigated for high-performance acoustic energy scavenging. The system is capable of generating a power output of 4.33 mW under 100 dB sound pressure level excitation. Up to 72 LEDs and a commercial calculator can be directly and continuously driven by the acoustic resonator system, indicating its application as a power source for electronic devices. Furthermore, we develop a self-powered edge sensing system consisting of the A-TENG, an AI speech recognition chip, and control circuits. The speech signals can be firstly converted into electrical signals through the A-TENG, and then recognized and processed by the AI chip with a built-in and pre-trained neural network to control the follow-up circuits. The selfpowered edge sensing system is capable of real-time speech recognition without cloud computing, exhibiting great potential in the field of low-power and cost-effective intelligent Internet of Things.
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