方形压电石英晶片扭转效应理论研究和验证  

Theoretical Investigation of Torsional Effect of a Rectangular Piezoelectric Quartz Disc and Verification

作　　者：朱命怡[1] 吴晓铃[2] 高长银[3] 

机构地区：[1]河南机电高等专科学校,新乡453003 [2]郑州大学,郑州450001 [3]郑州航空工业管理学院,郑州450015

出　　处：《中国机械工程》2011年第13期1555-1558,共4页China Mechanical Engineering

摘　　要：对方形压电石英晶片扭转效应进行研究。利用各向异性弹性力学、压电学和麦克斯韦电磁场理论,求出扭转应力和极化电荷分布的规律。在此基础上采用有限元法对极化电场进行了模拟,仿真结果显示了场强和电势都以x轴为中心呈反对称分布。试验结果表明方形石英晶片存在扭转效应,且电极所测量的电荷量与扭矩呈线性关系。研究结果可为开发新型扭矩传感器提供理论支持。The torsional effect of a rectangular disc was investigated herein.By using the theory of anisotropic elasticity,piezoelectricity and the Maxwell electromagnetism,the torsional stress and the distribution of surface charge densities of a piezoelectric quartz disc were calculated.Then,by FEM the polarization electric field intensity and potential were simulated,and the simulation results show the distributions of the potential and the electric field intensity in the quartz disc are both antisymmetric with respect to the x axis.Finally,experimental results show that the torsional effect is existed and the bound charges are linear with the torque applied.Undoubtedly,the research will provide the basis for the torque measuring technique.

关 键 词：压电石英 扭转效应 有限元法 电场 电势 

分 类 号：TH701[机械工程—仪器科学与技术] O730[机械工程—精密仪器及机械]