CHEN Dong-hong, LIU Li, WANG Er-wei, et al. Structure design and key technology of hybrid micro energy collector[J]. 2017, 36(1): 101-104. DOI: 10.13873/J.1000-9787(2017)01-0101-04.
复合式微型能量采集器结构设计及关键技术
摘要
提出一种压电效应和电磁效应相结合的微型能量采集器
基础结构为压电换能器(PZT)基八悬臂梁、长有Au线圈质量块、铷铁硼(Nd Fe B)永磁体。利用有限元分析软件ANSYS对微结构建立模型
A combination of piezoelectric effect and electromagnetic effect micro power generator is presented
of which the foundation structure is PZT-based eight cantilever beams
mass block with Au coil and Nd Fe B permanent magnets. The structural mechanic characteristic of the device is analyzed by finite element analysis software ANSYS. The first-order resonant frequency is estimated to be 214. 7 Hz
pretty suggestive for the later test. The micromachining process is constituted and the mask layout of micro power generator is designed using LEdit. Satisfactory heterogeneous integrated manufacturing of PZT piezoelectric films(
3 529 nm) on the Pt/Ti/SiO
2
/Si/SiO
2
substrate is obtained with sol-gel technology
complete one key step in the whole producing process. The dielectric properties test show that PZT thick film has the double butterfly shape polarization reversal peak
high dielectric properties and compression strength. The electric hysteresis loop of PZT thick film is measured in400 k V/cm
which reveal good ferroelectric properties with residual polarization Pr( 37. 7 μC/cm2) and coercive field( 41. 2 k V/cm).