A piezoelectric pulse generator for low frequency non-harmonic vibration

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Jiang, Hao^1 ; Yeatman, Eric M.^1

Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom^1

关键词: Harmonic vibration;    Low-frequency;    New approaches;    Piezoelectric cantilevers;    Pulse generation;    Self synchronous;    Self-powered;    Transduction mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012059/pdf
DOI  :  10.1088/1742-6596/476/1/012059

来源: IOP

【 摘 要 】

This paper reports a new piezoelectric prototype for pulse generation by energy harvesting from low frequency non-harmonic vibration. The pulse generator presented here consists of two parts: the electromechanical part and the load circuit. A metal rolling rod is used as the proof mass, moving along the substrate to achieve both actuating of the piezoelectric cantilever by magnetic coupling and self-synchronous switching of the circuit. By using this new approach, the energy from the piezoelectric transduction mechanism is regulated simultaneously when it is extracted. This allows a series of tuneable pulses to be generated, which can be applied to self-powered RF wireless sensor network (WSN) nodes.