基于碰撞的多方向压电电磁能量采集器研究  

Research on Collision-Based Multi-Directional Piezoelectromagnetic Energy Harvester

作　　者：周诗豪 宋芳[2] ZHOU Shihao;SONG Fang(College of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Engineering Training Center(School of Innovation and Entrepreneurship),Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上海工程技术大学工程训练中心(创新创业学院),上海201620

出　　处：《传感技术学报》2024年第5期783-788,共6页Chinese Journal of Sensors and Actuators

摘　　要：针对传统单悬臂梁能量采集器工作频带窄,采集效率低,采集方向单一的问题,提出了一种基于碰撞的多方向压电电磁能量采集器。分析了引入碰撞的过程和多种工作模式的理论功率输出,建立了能量采集器的理论模型,制作了实验样机,研究了z方向不同碰撞间距对压电工作模式电压输出的影响,计算了最佳间距下不同工作模式的功率输出结果。结果表明,在碰撞间距为3 mm时,z方向压电工作模式可在更多频段产生机械耦合效应,输出电压最高达19.94 V,带宽为20.5 Hz,在混合采集工作模式下在x方向和z方向输出最高功率分别为0.11 W、0.46 W,带宽分别为18.5 Hz、20.5 Hz。A collision-based multi-directional piezoelectromagnetic energy harvester is proposed targeting at the problems of narrow operating band,low collection efficiency and single collection direction of the traditional single cantilever beam energy harvester.The process of introducing collision and the theoretical power output of multiple working modes are analyzed,the theoretical model of the energy harvester is established,the experimental prototype is fabricated,the effect of different collision spacing in z-direction on the voltage output of piezoelectric working modes is studied,and the power output results of different working modes under the optimal spacing are calculated.The results show that the z-direction piezoelectric working mode can produce mechanical coupling effect in more frequency bands with the highest output voltage of 19.94 V and bandwidth of 20.5 Hz at the collision spacing of 3 mm,and the highest power output in x-direction and z-direction are 0.11 W and 0.46 W with the bandwidth of 18.5 Hz and 20.5 Hz respectively in the hybrid harvesting working mode.

关 键 词：振动能量收集 压电电磁能量采集器 机械耦合 碰撞 多方向 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]