激光多普勒准静态法测量磁致伸缩系数  

Magnetostriction quasi-static measurements with laser Doppler effect

作　　者：李英明[1,2] 莫喜平[1] 潘耀宗[1] 刘永平[1] 张运强[1] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学物理科学学院,北京100049

出　　处：《工程科学学报》2016年第11期1584-1589,共6页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(11304350);中国科学院青年创新促进会资助项目(2014021)

摘　　要：提出了一种利用激光多普勒测量磁致伸缩系数的方法,理论分析了激光多普勒测量磁致伸缩系数的工作原理,设计了铁镓合金棒材的测试系统.对铁镓合金棒(Galfenol)的准静态磁致伸缩系数进行测量.结果显示,该方法所获得应变与出厂数据符合较好,在10 Hz驱动电流下获得铁镓合金棒的动态变化曲线.该测量方法具有以下优势:(1)能够实现非接触测量;(2)可以测量铁镓合金棒端面任意点的应变情况;(3)测量结果准确度较高;(4)测量操作简单.A quasi-static method for measuring the magnetostrictive coefficient of Fe-Ga alloys by using laser Doppler effect was put forward, and its working principle was also analyzed. The quasi-static magnetostrictive coefficient of Galfenol was measured. The results show that strains obtained from the measuring setup are consistent with factory data, and the dynamie characteristics curve of Galfenol driven by 10 Hz current is obtained. This method has the following advantages： （1） noncontact measurement can be imple- mented, （2） the strain of magnetostrietion in any point of the rod surface can be measured, （3） the accuracy is better, and （4） little operator skill is required.

关 键 词：铁镓合金 磁致伸缩 激光 多普勒效应 

分 类 号：TG132.27[一般工业技术—材料科学与工程]