姚恩涛
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基于EMAT的磁致伸缩特性的测量
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Affiliation of Author(s):自动化学院

Journal:2017远东无损检测新技术论坛论文集

Key Words:磁致伸缩;残余应力;EMAT换能器;

Abstract:提出了一种通过检测铁磁性材料的磁致伸缩特性来反映残余应力的研究思路,设计了一种基于磁致伸缩原理的电磁超声应力检测系统。该系统使用FPGA产生激励信号,经功率放大后激励换能线圈,进而在铁磁性材料中激发超声波。针对电磁超声换能器信号十分微弱的特点,设计了微弱信号放大电路,提高了系统的抗干扰能力。利用此系统对多种铁磁性材料进行检测实验,绘制信号-场强曲线。实验测试结果表明,该曲线可以反映材料的磁致伸缩特

Translation or Not:no

Date of Publication:2017-06-21

Co-author:邹华章,Wang Ping,xj,周静

Correspondence Author:Yao Entao

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Professor
Supervisor of Master's Candidates

Gender:Male

Alma Mater:南京航空航天大学

Education Level:博士毕业

Degree:Doctoral Degree in Engineering

School/Department:College of Automation Engineering

Discipline:Measurement Technology and Instrumentation. Precision Instrument and Machinery

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