扫频测量在GMI效应测试中的应用  

Application of Sweep Frequency in GMI Test

作　　者：张鑫[1] 晋芳[1] 周玲[1] 

机构地区：[1]中国地质大学(武汉)机械与电子信息学院,湖北武汉430074

出　　处：《测控技术》2014年第8期27-29,共3页Measurement & Control Technology

基　　金：国家自然科学基金青年科学基金项目(41004079);高等学校博士学科点专项科研基金(20100145120007);中国地质大学(武汉)中央高校基本科研业务费专项资金资助项目(CUG120107)

摘　　要：对磁性材料巨磁阻抗(GMI)效应的研究需要测试其在不同频率下的GMI曲线,而用传统GMI测试方法构建的系统在单次测试中只能得到单个频率下的GMI曲线,因此需要多次测试才能得到材料在不同频率下的GMI曲线,测试效率十分低下。将扫频测量方法引入GMI效应的测试中,分析了GMI效应扫频测量的原理,并应用于LabVIEW软件编写的GMI测试系统程序。通过对Vitrovac6025带材的GMI效应进行对比测试实验,发现该扫频测量方法测得的GMI效应曲线与其他文献测试结果一致,并且该方法可以在单次测试中实现被测材料的多个频率下GMI效应的同时测量,从而大大减少了GMI测试所耗费的时间,提高了测试效率。It is necessary to measure the GMI （giant magneto-impedance） curve of magnetic material under a series of frequency in the research of GMI effect. Conventional measurement method of GMI effect can only get one GMI curve under a frequency in a single test. GMI curves under different frequency can be gotten by many tests, so the test efficiency is very low, The sweep frequency measurement method is introduced and applied to the test system which is programmed in LabVIEW. By testing the Vitrovae6025 amorphous ribbons, the GMI effect curves measured by the sweep measurement method are consistent with the result of other literatares. The results show that the designed test system can implement the measurement of GMI effect under multi-frequency at the same time in a single test, the time of GMI test is greatly reduced and the efficiency of the test is improved.

关 键 词：巨磁阻抗效应 扫频 测试 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]