Characteristics of T(0,1) Guided-Wave Point-Focusing Electromagnetic Acoustic Transducer for Pipe Inspection

被引：17

作者：

Huang, Songling ^{[1
]}

Sun, Hongyu ^{[1
]}

Shen, Gongtian ^{[2
]}

Wang, Baoxuan ^{[2
]}

Wang, Qing ^{[3
]}

Zou, Jun ^{[1
]}

Wang, Shen ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab Power Syst, Dept Elect Engn, Beijing 100084, Peoples R China

[2] China Special Equipment Inspect & Res Inst, Beijing 100029, Peoples R China

[3] Univ Durham, Dept Engn, Durham DH1 3LE, England

来源：

IEEE SENSORS JOURNAL | 2020年 / 20卷 / 06期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

T(0; 1) guided-wave; point-focusing; periodic permanent magnet; focal length; defect width; HOLLOW CYLINDERS; EMAT; PROPAGATION; EXCITATION; CORROSION; SIGNALS; DESIGN; PLATES;

D O I：

10.1109/JSEN.2019.2958953

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Electromagnetic acoustic transducers (EMATs) are widely used in the field of non-destructive testing (NDT) and non-destructive evaluation (NDE) due to their advantages of non-contact and applicability in complex environments. However, their low energy-conversion efficiency restricts their application in industrial testing. This work proposes a newly designed focusing EMAT based on the T(0, 1)-wave in a pipe to improve the energy conversion efficiency of EMATs. The focal length and defect width are investigated in this paper, and the advantages of the newly designed point-focusing transducer are shown in comparison with traditional unfocused transducers. Results show that the newly designed pipe focusing EMAT can increase the intensity of the defect reflection wave by around 60%, and the reflected wave intensity can be enhanced by 70% in the experiment when compared to the unfocused one.

引用

页码：2895 / 2903

页数：9

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