板中超声导波弧形合成孔径阵列多帧满秩成像检测

doi:10.3901/JME.2020.24.024

机械工程学报 ›› 2020, Vol. 56 ›› Issue (24): 24-30.doi: 10.3901/JME.2020.24.024

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板中超声导波弧形合成孔径阵列多帧满秩成像检测

朱新杰¹, 邓明晰², 蔡淑娟¹, 蒋亮¹, 王睿鹏¹

1. 北方民族大学材料科学与工程学院银川 750021;
2. 重庆大学航空航天学院重庆 400044

收稿日期:2019-12-13 修回日期:2020-06-22 出版日期:2020-12-20 发布日期:2021-02-05
通讯作者: 邓明晰(通信作者),男,1965年出生,博士,教授,博士研究生导师。主要研究方向为超声学、非线性声学、超声成像、结构工程检测等。E-mail:dengmx65@yahoo.com
作者简介:朱新杰,男,1977年出生,博士,硕士研究生导师。主要研究方向为超声成像、材料无损检测和评估、结构工程检测等。E-mail:zxjconcrete@163.com
基金资助:
国家自然科学基金（11574399，11834008，11474361）和中国博士后科学基金特别（2016T90984）资助项目。

Multi-frames Imaging Detection of Full Rank for Arc Synthetic Aperture Array of Ultrasonic Guided Waves in Plates

ZHU Xinjie¹, DENG Mingxi², CAI Shujuan¹, JIANG Liang¹, WANG Ruipeng¹

1. School of Materials Science and Engineering, North Minzu University, Yinchuan 750021;
2. College of Aerospace Engineering, Chongqing University, Chongqing 400044

Received:2019-12-13 Revised:2020-06-22 Online:2020-12-20 Published:2021-02-05

摘要/Abstract

摘要： 超声导波合成孔径阵列作为一种基本的成像方式，其"一发多收"阵列多帧满秩成像具有重要意义。针对板中超声导波弧形合成孔径阵列，运用波幅矩阵和渡时矩阵对弧形阵列接收孔径进行分析讨论，在依次变换发射阵元情况下，研究弧形合成孔径阵列多帧满秩成像和全帧满秩成像。研究结果显示，弧形合成孔径阵列多帧满秩成像可用以表征成像检测区域内散射体信息，弧形阵列自然焦点处多帧满秩图像灰度值基本一致，全帧满秩图像信噪比得到了不同程度增大。由于阵列阵元"边缘效应"，阵列边缘阵元所对应的满秩图像背景灰度值增大约50%，全帧满秩图像对比度增大约200%。成像检测试验验证了成像原理的可行性，表明板中超声导波弧形合成孔径阵列多帧满秩成像可有效表征待检区域声场散射信息，研究工作可为深入开展超声导波非规则阵列成像检测研究与应用提供重要基础。

关键词: 超声导波, 弧形合成孔径阵列, 接收矩阵, 多帧满秩成像检测

Abstract: The synthetic aperture array of ultrasonic guided waves is a important imaging method, which multi-frames imaging detection of full rank is of great significance. Aiming at the arc synthetic aperture array of ultrasonic shear horizontal (SH) guided waves in plates, the receiving aperture of arc synthetic aperture array are analyzed by using the amplitude matrix and the flight time matrix. Under the condition of transforming the transmitting array elements in turn, the multi-frames imaging of full rank and whole-frame full rank imaging of the arc synthetic aperture array are all discussed. The research results show that the multi-frames imaging of full rank of arc synthetic aperture array could be used to characterize the scattering information in the testing area, the gray value of the multi-frames images of full rank at the natural focus of arc synthetic aperture array are according with each other, and the signal-to-noise ratio of the whole-frame image of full rank is increasing. Due to the "edge effect" of the array element, the background gray value of the images corresponding to the array edge element increases by about 50%, and the contrast value of the whole-frames image of full rank increases by about 200%. The imaging detection experiment verifies the feasibility of the imaging principle, which shows that the multi-frame full rank image of arc synthetic aperture array for ultrasonic guided waves in plates could characterize the scattering information of the area to be examined, and the research work proposed would provide an important basis for the further research and application of irregular array imaging detection of ultrasonic guided waves in plates.

Key words: ultrasonic guided waves, arc synthetic aperture array, receiving matrix, multi-frames imaging detection of full rank

中图分类号:

TB553

朱新杰, 邓明晰, 蔡淑娟, 蒋亮, 王睿鹏. 板中超声导波弧形合成孔径阵列多帧满秩成像检测[J]. 机械工程学报, 2020, 56(24): 24-30.

ZHU Xinjie, DENG Mingxi, CAI Shujuan, JIANG Liang, WANG Ruipeng. Multi-frames Imaging Detection of Full Rank for Arc Synthetic Aperture Array of Ultrasonic Guided Waves in Plates[J]. Journal of Mechanical Engineering, 2020, 56(24): 24-30.

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板中超声导波弧形合成孔径阵列多帧满秩成像检测

Multi-frames Imaging Detection of Full Rank for Arc Synthetic Aperture Array of Ultrasonic Guided Waves in Plates

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