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Author:

Xie, Yuedong (Xie, Yuedong.) | Yin, Liyuan (Yin, Liyuan.) | Liu, Zenghua (Liu, Zenghua.) (Scholars:刘增华) | Deng, Peng (Deng, Peng.) | Yin, Wuliang (Yin, Wuliang.)

Indexed by:

Scopus SCIE

Abstract:

Typically, meander-line-coil electromagnetic acoustic transducers (EMATs) with wires of a constant length are used to generate Rayleigh waves. However, significant side lobes are observed in this design. In this paper, a novel meander-line-coil with variable-length wires is proposed to suppress side lobes of the Rayleigh waves' beam. This novel EMAT is simulated by using a wholly analytical method, which involves the coupling of an analytical EM model and an analytical US model to generate the radiation pattern of Rayleigh waves. The Rayleigh waves' beam directivity of this novel variable-length meander-line-coil (VLMLC) is quantitatively analyzed by the half power beamwidth and the sidelobe level; the effect of the length step on the Rayleigh waves' beam directivity is discussed. A 50-mm VLMLC with a length step of 8 mm is fabricated and experimentally analyzed; experimental results showed that novel VLMLCs are capable of suppressing side lobes of the Rayleigh waves' beam, which is not achievable by the conventional meander-line-coil. To the best of our knowledge, there has been no report so far of the VLMLCs EMAT.

Keyword:

beam directivity variable-length meander-line-coils (VLMLC) analytical solutions Rayleigh waves Electromagnetic acoustic transducers (EMATs)

Author Community:

  • [ 1 ] [Xie, Yuedong]Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England
  • [ 2 ] [Yin, Wuliang]Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England
  • [ 3 ] [Yin, Liyuan]Kunming Univ Sci & Technol, Sch Informat Engn & Automat, Kunming 650093, Peoples R China
  • [ 4 ] [Liu, Zenghua]Beijing Univ Technol, Sch Mech Engn & Appl Elect Technol, Beijing 100029, Peoples R China
  • [ 5 ] [Deng, Peng]Beijing Univ Technol, Sch Mech Engn & Appl Elect Technol, Beijing 100029, Peoples R China

Reprint Author's Address:

  • [Xie, Yuedong]Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England

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Source :

IEEE SENSORS JOURNAL

ISSN: 1530-437X

Year: 2016

Issue: 16

Volume: 16

Page: 6279-6287

4 . 3 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:166

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 21

SCOPUS Cited Count: 29

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 9

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