电磁超声换能器线圈设计与提高换能效率研究  

Research of Spiral Coil on EMAT to Improve Transduction Efficiency

作　　者：范吉志 吴运新[1,2] 石文泽[1,2] 龚海[1,2] 谭良辰 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,长沙410083 [2]中南大学机电工程学院,长沙410083

出　　处：《传感技术学报》2016年第1期29-34,共6页Chinese Journal of Sensors and Actuators

基　　金：国家科技支撑计划项目(2014BAF12B01);高性能复杂制造国家重点实验室自主研究课题项目(zzyjkt2013-06B)

摘　　要：提出了一种提高电磁超声换能器EMAT(Electromagnetic Acoustic Transducer)换能效率的方法,首先,在COMSOL Multiphysics软件中建立了电磁超声无损检测激发探头有限元模型,然后研究了电磁超声换能器中双层叠加螺旋线圈的基板厚度、铜箔厚度以及提离距离对换能效率的影响。结果表明:减小基板厚度以及提离距离,增加线圈铜箔厚度可以提高EMAT换能效率。最后通过实验进行验证,仿真结果与实验基本一致。A novel method for improving the transduction efficiency of Electromagnetic Acoustic Transducer（EMAT）is introduced. In this paper,a model of a doubled-layer spiral coil EMAT for generating shear wave wasmodeled in the finite element software COMSOL Multiphysics. And then the effects of the substrate thickness,cop-per conductor thickness and lift-off on the efficiency are investigated. Results show that the reducement in the sub-strate thickness and lift-off,the increasement in the copper conductor thickness can help to improve the efficiency.And the simulation results are verified by the experiments.

关 键 词：电磁超声换能器 有限元 螺旋线圈 换能效率 

分 类 号：TN41[电子电信—微电子学与固体电子学]