摘要
压电俘能器可以将环境中的机械能转换成电能,具有节能环保、易于微型化等优点,近年来引起了广泛的关注。在对比几种压电材料的性能和应用的基础上,介绍了压电振子的振动模式及结构形式,对标准能量回收电路(SEH)、串联同步开关电感电路(S-SSHI)、同步电荷提取电路(SECE)、并联同步开关电感电路(P-SSHI)、双同步开关电感电路(DSSH)等5种能量回收电路进行了分析,从理论上揭示了梁式压电俘能器(简支梁、悬臂梁)、盘式压电俘能器(周边固定、简支固定、中心固定)的俘能机理,并对压电俘能器的发展方向做了展望。
The piezoelectric energy harvester can convert the mechanical energy from the environment into electrical energy. And it has attracted wide attention in energy harvest from vibration,wind and sea tide as well as electricity generation for traffic system due to its advantages in energy saving,environmental protection and miniaturization. On the basis of the vibration mode and structure of the piezoelectric vibrator,the characteristics of five kinds of energy recovery circuits were analyzed,including standard energy harvesting circuit( SEH circuit),series-SSHI interface circuit( S-SSHI circuit),synchronous electric charge extraction circuit( SECE circuit),parallel-SSHI interface circuit( P-SSHI circuit),double synchronized switch harvesting circuit( DSSH circuit). The energy harvesting mechanism of the beam type( simply supported beam,cantilever beam) and disk type( fixed boundary,simply supported,central fixed) of piezoelectric energy harvester is theoretically studied. In this review paper,mechanism is discussed,followed by the classification of piezoelectric energy harvester based on their major functionalities. The recent developments in the field with an outlook for future developments are also presented.
引文
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