弓字形单晶梯形压电悬臂梁压电性能分析  

Piezoelectric Performance Analysis of an Bow Glyph Single Chip Trapezoidal Piezoelectric Cantilever Beam

作　　者：江兵[1] 陈红[1] 陈丽娟[2] 王强[1] 

机构地区：[1]南京邮电大学自动化学院,江苏南京210046 [2]东南大学电气工程学院,江苏南京210096

出　　处：《计算机技术与发展》2014年第10期206-210,共5页Computer Technology and Development

基　　金：国家自然科学基金资助项目(51007007;11202107;61203213);江苏省高校自然科学基金(11KJB130002;11KJB510011);江苏省科技支撑计划项目(BE2011843);高等学校博士学科点专项科研基金(20113223120008)

摘　　要：为了解决电池在低功耗电子产品供能时出现的问题,文中提出一种新型的压电悬臂梁—弓字形单晶梯形压电悬臂梁结构。利用数值分析比较单个矩形和梯形悬臂梁的发电能力;之后对这种结构进行了理论分析,得出了谐振角频率与悬臂梁长度的2/3次方成反比,即谐振频率随梁长度的增大而减小;最后利用有限元方法分析了弓字形单晶梯形压电悬臂梁结构的发电能力,长度对频率的影响,验证了理论分析结果。这种结构既能够有效地降低谐振频率达到低频、宽频带,同时实现微型化,能给无线传感器等低耗能产品供能。In order to measure and study the electricity generating performance of the piezoelectric ceramics,propose a new type of piezoe-lectric cantilever beam-bow glyph single trapezoidal piezoelectric cantilever beam structure. Firstly,use numerical analysis to compare the generating capacity between the single rectangular cantilever beam and the single trapezoidal cantilever beam. Secondly,analyze the structure in theory,two-thirds of the angular frequency of resonance is obtained and the length of cantilever beam inverse proportion. Fi-nally,use FEM to analyze the structure capacity,the length of the influence on frequency,the results of the theoretical analysis is verified. This structure can not only effectively reduce the resonant frequency to suit the requirements of low frequency,wide band,but also can reach miniaturization,satisfy wireless sensor requirements.

关 键 词：弓字形单晶梯形压电悬臂梁 发电能力 谐振频率 有限元方法 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]