Energy Autonomous Wireless Sensing System Enabled by Energy Generated during Human Walking

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Kuang, Yang^1 ; Ruan, Tingwen^1 ; Chew, Zheng Jun^1 ; Zhu, Meiling^1

College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter

EX4 4QJ, United Kingdom^1

关键词: Energy Harvester;    Health monitoring;    High energy efficiency;    Power conditioning;    Real world setting;    Three sensors;    Wireless sensing;    Wireless sensor nodes (WSN);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012050/pdf
DOI  :  10.1088/1742-6596/773/1/012050

来源: IOP

【 摘 要 】

Recently, there has been a huge amount of work devoted to wearable energy harvesting (WEH) in a bid to establish energy autonomous wireless sensing systems for a range of health monitoring applications. However, limited work has been performed to implement and test such systems in real-world settings. This paper reports the development and real-world characterisation of a magnetically plucked wearable knee-joint energy harvester (Mag-WKEH) powered wireless sensing system, which integrates our latest research progresses in WEH, power conditioning and wireless sensing to achieve high energy efficiency. Experimental results demonstrate that with walking speeds of 3∼7 km/h, the Mag-WKEH generates average power of 1.9∼4.5 mW with unnoticeable impact on the wearer and is able to power the wireless sensor node (WSN) with three sensors to work at duty cycles of 6.6%∼13%. In each active period of 2 s, the WSN is able to measure and transmit 482 readings to the base station.