多通道石英微天平振动耦合分析  

Analysis on Coupling Characteristic of Multichannel Quartz Crystal Microbalance

作　　者：李沛[1] 连东侠[1] 张培强[1] 吕品[1] 

机构地区：[1]中国科学技术大学力学与机械工程系

出　　处：《压电与声光》2004年第3期252-256,共5页Piezoelectrics & Acoustooptics

摘　　要：应用明德林的二维压电板理论,用有限元方法求解并分析了两圆形石英晶体微天平(MQCM)的设计参数对频率耦合的影响。通过选取合适的尺寸设计参数,可有效地使两圆形石英晶体微天平(QCM)的耦合减少到最小,指出振动耦合现象的产生是由一谐振元的基模能与另一谐振元的泛音模发生强烈耦合引起的;提出了优化设计MQCM的建议。In this paper, the frequency interference characteristic of multichannel quartz crystal microbalances(MQCM) is analyzed based on Mindlin's two-dimensional piezoelectric plate theory. The influence of designing parameters on the frequency behavior of the QCM structure is studied. It shows that one can minimize the frequency interference between two circular-shaped quartz crystal microbalances by selecting appropriate designing parameters. Based on the result, we advance some measure to diminish the coupling between two adjacent QCMs.

关 键 词：多通道石英微天平(MQCM) 振动耦合 谐振元 

分 类 号：O326[理学—一般力学与力学基础]