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寬頻帶梯形叉指式換能器優(yōu)化設(shè)計(jì)及應(yīng)用
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江蘇大學(xué)

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國(guó)家自然科學(xué)基金 (11872191 and 11520101001), 江蘇省研究生創(chuàng)新基金 (KYCX19_1578)


Research on the Optimal Design and Application of Wideband TIDT Structures
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National Natural Science Foundation of China (11872191 and 11520101001), Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1578)

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    摘要:

    由聲表面波（Surface Acoustic Wave）器件發(fā)展而來(lái)的叉指換能器（Interdigital Transducer，IDT）由于其工作頻率可以設(shè)計(jì)、頻帶寬可調(diào)、損耗低等特點(diǎn)逐步應(yīng)用于結(jié)構(gòu)健康監(jiān)測(cè)（Structural Health Monitoring，SHM）系統(tǒng)中，因此在智能材料與結(jié)構(gòu)中有著廣泛的應(yīng)用前景。本文針對(duì)現(xiàn)有矩形IDT帶寬窄的不足，研究寬頻帶梯形叉指換能器（Trapezoidal Interdigital Transducer，TIDT）。采用有限元分析方法對(duì)TIDT的尺寸進(jìn)行結(jié)構(gòu)優(yōu)化設(shè)計(jì)，并對(duì)設(shè)計(jì)的TIDT進(jìn)行性能測(cè)試，通過(guò)實(shí)驗(yàn)研究了TIDT用于結(jié)構(gòu)損傷檢測(cè)的初步應(yīng)用。實(shí)驗(yàn)結(jié)果表明，TIDT在實(shí)際應(yīng)用中進(jìn)一步提高了損傷識(shí)別精度，具有廣泛的應(yīng)用前景。

    Abstract:

    The interdigital transducer (IDT), developed from surface acoustic wave devices, has been gradually applied to structural health monitoring systems due to its operating frequency, adjustable frequency bandwidth and low loss. Therefore, it has a wide application prospect in smart materials and structures. In this paper, the wideband trapezoidal interdigital transducer (TIDT) is studied for the shortage, narrow bandwidth, of the existing rectangular IDT. The finite element analysis method was used to optimize the TIDT structure, and the TIDT performance was tested. The preliminary application of TIDT for structural damage detection was studied through experiments. The experimental results show that TIDT improves damage recognition accuracy in practical applications and has broad application prospects.

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王自平.寬頻帶梯形叉指式換能器優(yōu)化設(shè)計(jì)及應(yīng)用[J].稀有金屬材料與工程,2020,49(11):3790~3795.[Wang Ziping. Research on the Optimal Design and Application of Wideband TIDT Structures[J]. Rare Metal Materials and Engineering,2020,49(11):3790~3795.]
DOI：10.12442/j. issn.1002-185X.20191056

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  • 收稿日期:2019-12-15
  • 最后修改日期:2020-04-18
  • 錄用日期:2020-04-26
  • 在線發(fā)布日期: 2020-12-09
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