压电式地震能量收集器的能量收集性能及其理论模型研究

Abstract The self-powered technology of earthquake sensors and the seismic energy utilization have not been solved well up to now although earthquake includes mega energy. In view of this, a series of piezoelectric seismic energy harvesters (PSEHs) are developed, and their corresponding experiments and simulations about energy harvesting performance are conducted in the excitation of different seismic waves . The effects of some important design parameters on the output voltage and power of PSEHs are studied and discussed. The research results show that U-shaped PSEH has a good ability and ideal robustness in energy harvesting from different seismic waves . For example, the root mean square (RMS) voltages and RMS powers from U-shaped PSEH are 104 V and 11.1 mW for El-Centro wave with a peak ground acceleration (PGA) of 0.024 g, which is feasible to supply an earthquake sensor. Based on the experiment and simulation research, a series of theoretical models are derived to predict the output voltage and power of U-shaped PSEH with different design parameters and different PGAs, these theoretical models give reliable instructions for the design of U-shaped PSEH to match the earthquake sensors in the area authorized by different earthquake intensities.