电磁超声传感器工作原理与结构
Working Principle and Structure of Electromagnetic Acoustic Transducers
摘 要
电磁超声传感器(Electromagnetic acoustic transducer,EMAT)是一种新型超声传感器。与传统压电超声探头相比,不需要耦合剂,检测速度快,可灵活实现不同超声波波型的激励与接收。然而,由于被测试件也是电磁超声传感器的一部分,其材料特性使得电磁超声传感器原理变得复杂。从EMAT中静态偏置磁场与动态磁场复合作用的角度出发,阐述EMAT的基本原理及结构,从而为EMAT的设计与选择提供参考。
静态偏置磁场
动态磁场
洛伦兹力
磁致伸缩效应
Electromagnetic acoustic transducer
Static bias magnetic field
Dynamic magnetic field
Lorentz force
Magnetostrictive effect
Abstract
Electromagnetic acoustic transducer (EMAT)is a new type of ultrasonic sensor. Compared with the traditional piezoelectric ultrasonic probe,EMAT requires no coupling media,has faster testing speed,and can generate and receive various types of ultrasonic wave flexibly,which results to a broad application prospect in the field of nondestructive testing and researchers’ extensive attention. However,the specimen is also a part of the EMAT and its material texture makes it relatively complex to explain the principle of EMAT. In this paper,the composite effect of static bias magnetic field and dynamic magnetic field is considered,and the basic principle and structure of EMAT is studied,which can provide reference for the design and selection of EMAT.
中图分类号 TG115.28
所属栏目 综述
基金项目 国家重大科学仪器设备开发专项资助项目(2012YQ09017502)
收稿日期 2014/5/26
修改稿日期
网络出版日期
作者单位点击查看
备注丁秀莉(1990-),女,硕士研究生,主要从事电磁超声无损检测技术研究工作。
引用该论文: DING Xiu-li,WU Xin-jun,GUO Kai,WU Lian-feng. Working Principle and Structure of Electromagnetic Acoustic Transducers[J]. Nondestructive Testing, 2015, 37(1): 96～100
丁秀莉,武新军,郭锴,吴莲锋. 电磁超声传感器工作原理与结构[J]. 无损检测, 2015, 37(1): 96～100
被引情况:
【1】杨理践,宋靖宇,高松巍,刘 斌, "曲折线圈折线角度对EMAT换能效率的影响",无损检测 38, 26-29(2016)
【2】赵军辉,朱绪祥,沈宇平, "中距离电磁超声导波检测及应用",无损检测 37, 5-9(2015)
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参考文献
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【4】RIBICHINI R,CEGLA F,NAGY P B,et al. Study and comparison of different EMAT configurations for SH wave inspection[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2011,58(12):2571-2581.
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【10】HIRAO M,OGI H. EMATS for science and industry: noncontacting ultrasonic measurements[M],[S.l]:Library of Congress,2003.
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【14】NA W B,KUNDU T. EMAT-based inspection of concrete-filled steel pipes for internal voids and inclusions[J].Journal of Pressure Vessel Technology: Transactions of the ASME,2002,124(3):265-272.
【15】PETCHER P A,POTTER M D G,DIXON S. A new electromagnetic acoustic transducer (EMAT) design for operation on rail[J].NDT & E International,2014,65:1-7.
【16】李鹏展,王亚坤,汪开灿,等. 基于电磁超声的列车轮对踏面在线探伤装置[J].无损检测,2013,35(7):70-74.
【17】高会栋. 电磁超声技术在焊缝检测中的应用[J].无损检测,2010,32(11):850-856.
【18】BEZLYUD'KO G Y,DOLBNYA E V,LESHCHENKO N G,et al. Portable electromagnetic-acoustic thickness meters (EMAT)[J].Russian Journal of Nondestructive Testing,2004,40(4):239-245.
【19】THOMPSON R B. A model for the electromagnetic generation of ultrasonic guided waves in ferromagnetic metal polycrystals[J].IEEE Transactions on Sonics and Ultrasonics,1978,25(1):7-15.
【20】汪玉刚,王丽,武新军. 电磁超声扭转波检测钢管缺陷的实验研究[J].传感器与微系统,2014,33(2):23-25.
【2】BAILLIE I,GRIFFITH P,JIAN X M,et al. Implementing an ultrasonic inspection system to find surface and internal defects in hot,moving steel using EMATs[J].Insight: Non-destructive Testing and Condition Monitoring,2007,49(2):87-92.
【3】胡力,严仍春. 电磁超声脉冲激励电路的设计[J].理化检验-物理分册,2013,49(3):174-176.
【4】RIBICHINI R,CEGLA F,NAGY P B,et al. Study and comparison of different EMAT configurations for SH wave inspection[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2011,58(12):2571-2581.
【5】GANTMAKHER V F,DOLGOPOLOV V T. Excitation of standing sound waves in bi by an electromagnetic method [J].Journal of Experimental and Theoretical Physics Letters,1967,5:12-14.
【6】LARSEN P K,SAERMARK K. Helicon excitation of acoustic waves in aluminium [J].Physics Letters A,1967,24(7):374-375.
【7】DOBBS E R. Electromagnetic generation of ultrasonic waves[J].Physical Acoustics,1973,10: 126-191.
【8】FROST H M. Electromagnetic-ultrasonic transducer: principles,practice and application[J].Physical Acoustics,1979,14: 179-275.
【9】THOMPSON R B. Physical principles of measurements with EMAT transducers[J].Physical Acoustics,1990,19: 157-200.
【10】HIRAO M,OGI H. EMATS for science and industry: noncontacting ultrasonic measurements[M],[S.l]:Library of Congress,2003.
【11】杨理践,梁震,高松巍. 电磁超声兰姆波的无损探伤技术[J].仪表技术与传感器,2012,12: 76-79.
【12】黄松岭,叶朝峰,王珅,等. 天然气管道裂纹电磁超声检测器研制[J].无损检测,2009,31(10):827-829.
【13】NORSWORTHY RJ RG G,MATTHIAS J. Locating disbonded coatings with EMAT technology-Part 1[J].Materials Performance,2012,51(10):40-44.
【14】NA W B,KUNDU T. EMAT-based inspection of concrete-filled steel pipes for internal voids and inclusions[J].Journal of Pressure Vessel Technology: Transactions of the ASME,2002,124(3):265-272.
【15】PETCHER P A,POTTER M D G,DIXON S. A new electromagnetic acoustic transducer (EMAT) design for operation on rail[J].NDT & E International,2014,65:1-7.
【16】李鹏展,王亚坤,汪开灿,等. 基于电磁超声的列车轮对踏面在线探伤装置[J].无损检测,2013,35(7):70-74.
【17】高会栋. 电磁超声技术在焊缝检测中的应用[J].无损检测,2010,32(11):850-856.
【18】BEZLYUD'KO G Y,DOLBNYA E V,LESHCHENKO N G,et al. Portable electromagnetic-acoustic thickness meters (EMAT)[J].Russian Journal of Nondestructive Testing,2004,40(4):239-245.
【19】THOMPSON R B. A model for the electromagnetic generation of ultrasonic guided waves in ferromagnetic metal polycrystals[J].IEEE Transactions on Sonics and Ultrasonics,1978,25(1):7-15.
【20】汪玉刚,王丽,武新军. 电磁超声扭转波检测钢管缺陷的实验研究[J].传感器与微系统,2014,33(2):23-25.
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