压电阻抗法中PZT片的形状选择研究  

Study on shape selection of PZT patch for electro mechanical impedance method

作　　者：张耀文 何颖[2] 赵晶[1] 霍林生 ZHANG Yaowen;HE Ying;ZHAO Jing;HUO Linsheng(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China;School of Traffic and Transportation,Dalian Institute of Science and Technology,Dalian 116052,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028 [2]大连科技学院交通运输学院,辽宁大连116052 [3]大连理工大学建设工程学部,辽宁大连116024

出　　处：《传感器与微系统》2024年第4期45-48,52,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(52178274)。

摘　　要：压电陶瓷锆钛酸铅(PZT)片是压电阻抗法中普遍使用的传感器,首先,对厚度相同且面积相近的圆形、正方形、矩形、五边形、梯形PZT片对同一钢板上相同损伤及其严重程度的敏感性进行了对比。然后,利用有限元软件COMSOL对各形状PZT片主表面平面内位移进行了分析研究。结果表明:在压电阻抗法应用中,面积相同的PZT片,圆形、正方形和矩形对损伤及其严重程度的敏感性较优。矩形PZT片对损伤的敏感性具有方向性,对宽度侧的损伤更敏感。就形状这一单一因素而言,压电阻抗法中PZT片的性能差异,取决于其主表面平面内位移一致性。一致性越好,对损伤及其严重程度的识别能力越强。Pb-based zirconate titanate(PZT)patch is commonly used sensor in electromechanical impedance(EMI)method.Firstly,the sensibility of PZT patches to the same damage and severity on the same steel plate is compared.In the experiment,circular,square,rectangle,pentagon,and trapezoid patches with the same thickness and similar area are used.Then,the displacement of the main surfaces of the PZT patches of various shapes is analyzed and studied,using finite element software COMSOL.The results show that in the application of EMI methods,PZT patches with the same area,circular,square,and rectangle patches are more sensitive to the damage and severity.Sensibility of rectangle PZT patch has directivity to the damage,and it is more sensitive to damage on its width side.In terms of the shape,the performance difference of the PZT patches used in EMI method mainly depends on the consistency of the displacement in the plane of their main surfaces.The more consistent of the displacement is,the stronger identification ability to damage and its severity.

关 键 词：压电阻抗法 锆钛酸铅片 形状 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] O429[自动化与计算机技术—控制科学与工程]