表面波电磁声换能器的设计  

Design of surface wave electromagnetic acoustic transtucers

作　　者：申建中[1] 张仲宁[1] 张淑仪[1] 

机构地区：[1]近代声学重点实验室南京大学声学研究所,南京210093

出　　处：《应用声学》2007年第4期197-201,共5页Journal of Applied Acoustics

摘　　要：简要介绍了产生表面波的电磁声换能器(EMAT)的工作原理,设计,制作了收发分开的两种EMAT,并建立了实验测试系统、测量了信号和发射EMAT提离距离的关系曲线,研究了激励脉冲个数、接收线圈的匝数对换能器信号的影响等。The working principle of electromagnetic acoustic transducers （EMATs） is presented briefly. The exciting and receiving EMATs have been designed and fabricated, and an experimental system has been established. The received signal-distance relation- ship and the influences of the emitted pulse number and the number of turns of the receive coil on the signal of the transducers are also given in this paper.

关 键 词：电磁声换能器 EMAT 回折线圈 

分 类 号：TG115.285[金属学及工艺—物理冶金]