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| Title | Piezoelectric Nanogenerator Enabled Fully Self-Powered Instantaneous Wireless Sensor System |
|---|---|
| ID_Doc | 42071 |
| Authors | Lu J.; Xu L.; Hazarika D.; Zhang C.; Li J.; Wu J.; Zhang K.; Wan R.; Xu X.; Chen J.; Jin H.; Dong S.; Huang Y.; Zhang Q.; Wu Y.; Luo J. |
| Year | 2024 |
| Published | Nano Energy, 129 |
| DOI | http://dx.doi.org/10.1016/j.nanoen.2024.110022 |
| Abstract | Self-powered real-time wireless sensor networks (WSNs) are vital for smart manufacturing, intelligent healthcare, and smart cities etc. Various nanogenerators have extensively exploited for powering these systems. Compared with triboelectric nanogenerators (TENGs), piezoelectric nanogenerators (PENGs) have smaller dimensions and can be easier to integrate into ICs, offering broader applications. However, fully self-powered instantaneous wireless sensor systems with PENGs are yet to be realized. Here, we present a PENG based, self-powered, instantaneous wireless (PSIW) sensor system. The integration of the PENG with an RLC sensing circuit facilitates the spontaneous generation of oscillating signals with encoded sensing information. To address the high internal impedance issue of PENGs, a piezoelectric voltage driven electronic switch is employed, ensuring that the oscillating signal's frequency and amplitude remain highly stable. The effects of variables on signal frequency are investigated in detail. The sensor system is utilized to sense bending (strain), and to monitor physical actions such as elbow swing, wrist bending, walking, running etc. Results showed that the PSIW sensor system can effectively monitor strain and bending angles, and judiciously detect body's physical movements. By employing either frequency-based or amplitude-based sensing methods, the PSIW sensor system demonstrates versatility and adaptability for various sensing applications. © 2024 Elsevier Ltd |
| Author Keywords | Electronic switch; Instantaneous wireless sensing; Piezoelectric energy harvesting; Piezoelectric nanogenerator; Self-powered |
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