关键词: 环境振动, 能量收集, 压电能量转换, 电磁能量转换, 最优负载

Abstract:

The piezoelectric and electromagnetic energy harvesting technology for vehicle sensors self-powered was studied. The mathematical models for the composite energy collection system was put forword, and the relationship about the resonance frequency of the system was analyzed with regard to the system configuration parameters. A piezoelectric and electromagnetic energy harvesting device was designed. Experiment shows it has good agreement with the analytical results in trend. The maximum of load power of the composite harvester achieves 3.75 mW at the resonant frequency of 18 Hz with acceleration of 0.5 g, and is increased by 17% compared with 3.2 mW of the single electromagnetic technique.

Key words: ambient vibration, energy harvesting, piezoelectric energy conversion, electromagnetic energy conversion, optimal load