摘要
为解决无线传感器网络和便携式电子产品的自供能问题,研究了基于电磁耦合的压电悬臂梁式振动能量收集器。理论分析表明,通过增加压电悬臂梁的所受外力,可以按平方关系提高其产生的发电量。即采用PZT4压电元件及铍青铜作为金属基板,以固定于基板末端的永磁铁作为质量块制作了基于电磁耦合的悬臂梁式压电振动能量收集器。实验表明,压电悬臂梁附加永磁铁后其最大输出电压增加了222%,压电悬臂梁在磁场强度分别为0 T与1 T的作用力下,电压值的增幅分别为0.38%和2.12%。
In order to solve the energy problem of the wireless sensor network and portable electronic products, the research on the piezoelectric vibration energy collector based on the electromagnetic coupling is performed in this paper. The theoretical ana- lysis shows that the generating energy can be proportional to the square of the external force applied on the vibration energy collec- tor. Through using the piezoelectric element of PZT4 and a metal substrate of beryllium bronze and adding two pieces of permanent magnet as the mass on the substrate free end, the piezoelectric vibration energy collector is manufactured. Experiments show that the maximum output voltage of the piezoelectric cantilever beam attached to the permanent magnet is increased by 222%. When the magnetic field strength is 0 T and 1 T, the maximum output voltage values are increased by 0.38% and 2.12% respectively.
出处
《电子技术应用》
北大核心
2015年第6期125-128,共4页
Application of Electronic Technique
关键词
压电发电
振动能量收集器
电磁耦合
谐振频率
piezoelectric generation
vibration energy harvester
electromagnetic coupling
resonance frequency
