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声波散射在焊接板结构超声导波合成孔径阵列成像中的作用

朱新杰1,2,邓明晰2,3

朱新杰1,2,邓明晰2,3. 声波散射在焊接板结构超声导波合成孔径阵列成像中的作用[J]. 焊接学报, 2018, 39(7): 65-70. DOI: 10.12073/j.hjxb.2018390177
引用本文: 朱新杰1,2,邓明晰2,3. 声波散射在焊接板结构超声导波合成孔径阵列成像中的作用[J]. 焊接学报, 2018, 39(7): 65-70. DOI: 10.12073/j.hjxb.2018390177
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ZHU Xinjie1,2, DENG Mingxi2,3. Action mechanism of acoustic scattering in synthetic aperture array imaging of ultrasonic guided waves in plate with welding structures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 65-70. DOI: 10.12073/j.hjxb.2018390177
Citation: ZHU Xinjie1,2, DENG Mingxi2,3. Action mechanism of acoustic scattering in synthetic aperture array imaging of ultrasonic guided waves in plate with welding structures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 65-70. DOI: 10.12073/j.hjxb.2018390177
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声波散射在焊接板结构超声导波合成孔径阵列成像中的作用

  • 1. 北方民族大学 材料科学与工程学院 银川 750021;
    2. 陆军勤务学院 岩土力学与地质环境保护重庆市重点实验室 重庆 401331;
    3. 重庆大学 航空航天学院 重庆 400044

基金项目: 国家自然科学基金资助项目（11574399，11474361）；中国博士后科学基金特别资助（2016T90984）

Action mechanism of acoustic scattering in synthetic aperture array imaging of ultrasonic guided waves in plate with welding structures

  • 1. School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China;
    2. Chongqing Key Laboratory of Geomechanics & Geoenvironmental Protection, Army Logistics University of PLA, Chongqing 401331, China;
    3. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China

摘要

    摘要
  • 摘要: 为揭示声波散射在焊接板结构超声导波合成孔径阵列成像中的作用机制，将散射回波矩阵和散射渡越时间矩阵用于分析描述超声水平剪切（shear horizontal，SH）导波声波散射，探讨了焊缝散射和边界散射在导波成像中的作用关系.结果表明，散射矩阵是揭示声波散射在超声导波阵列成像作用机制的有效工具，散射回波矩阵与散射渡越时间矩阵具有相同的散射矩阵因子，导波图像出现与散射矩阵因子成倍数关系的“条带”伪像，图像椭圆簇轨迹特征复杂化，图像背景噪声增强，图像信噪比减小.研究工作可为深入开展焊接板结构超声导波非直线阵列成像算法研究提供基础.
    Abstract: In order to discover the action mechanism of acoustic scattering in synthetic aperture array imaging of ultrasonic guided waves in plate with welding structures, the scattering amplitude matrix (SAM) and the scattering flight time matrix (SFTM) were proposed to analyze and describe the acoustic scattering of ultrasonic shear horizontal(SH) guided waves, the action relationship between the weld scattering and the boundary scattering were researched emphatically. The research result shows that, the scattering matrix may be a forceful analysis tool that may be used into discovering the action mechanism of acoustic scattering in synthetic aperture array imaging of ultrasonic guided waves, the SAM and the SFTM have the same scattering matrix factor that lead to pseudo strip-shaped shadows with the same degree and the characteristic of elliptical cluster tracks in array image, and then the background noise of image may increase and signal-nose ratio may decrease accordingly. The research work proposed would provide support for no-line array imaging algorithm of ultrasonic guided waves in plates with welded structure.
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    • 参考文献(13)
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    [2] 朱新杰, 邓明晰, 刘畅. 焊缝散射对板中超声水平剪切导波直线合成孔径阵列成像中影响[J]. 声学学报, 2016, 41(5):605-612. Zhu Xinjie, Deng Mingxi, Liu Chang. The influence of weld scattering on line synthetic aperture array imaging of ultrasonic shear horizontal guided waves in plate[J]. Chinese Journal of Acoustics, 2016, 41(5):605-612.
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    [12] 朱新杰, 韩赞东, 都东, 等. 基于合成孔径聚焦的超声SH导波成像检测[J]. 清华大学学报, 2011, 51(5):687-692. Zhu Xinjie, Han Zandong, Du Dong, et al. Imaging and inspection of ultrasonic SH-guided wave by synthetic aperture focusing[J]. Journal of Tsinghua University, 2011, 51(5):687-692.
    [13] 朱新杰, 韩赞东, 都东, 等. 基于椭圆簇轨迹特征的板中超声导波弧线类阵列成像研究[J]. 机械工程学报, 2012, 48(22):14-20. Zhu Xinjie, Han Zandong, Du Dong, et al. Imaging of ultrasonic guided waves in plate based on characteristic of elliptical cluster tracks for line-arc kind of array[J]. Chinese Journal of Mechanical Engineering, 2012, 48(22):14-20.
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  • 收稿日期:  2017-06-14

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