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合成孔径聚焦在水浸超声缺陷定量中的应用

周正干 周江华 章宽爽 马立印 孙广开

周正干, 周江华, 章宽爽, 等 . 合成孔径聚焦在水浸超声缺陷定量中的应用[J]. 北京航空航天大学学报, 2016, 42(10): 2017-2023. doi: 10.13700/j.bh.1001-5965.2015.0601
引用本文: 周正干, 周江华, 章宽爽, 等 . 合成孔径聚焦在水浸超声缺陷定量中的应用[J]. 北京航空航天大学学报, 2016, 42(10): 2017-2023. doi: 10.13700/j.bh.1001-5965.2015.0601
ZHOU Zhenggan, ZHOU Jianghua, ZHANG Kuanshuang, et al. Application of synthetic aperture focusing technique to defect quantification for immersion ultrasonic testing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2017-2023. doi: 10.13700/j.bh.1001-5965.2015.0601(in Chinese)
Citation: ZHOU Zhenggan, ZHOU Jianghua, ZHANG Kuanshuang, et al. Application of synthetic aperture focusing technique to defect quantification for immersion ultrasonic testing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2017-2023. doi: 10.13700/j.bh.1001-5965.2015.0601(in Chinese)

合成孔径聚焦在水浸超声缺陷定量中的应用

doi: 10.13700/j.bh.1001-5965.2015.0601
基金项目: 国家自然科学基金委员会-中国工程物理研究院联合基金(U1430120)
详细信息
    作者简介:

    周正干,男,博士,教授,博士生导师。主要研究方向:超声无损检测。Tel.:010-82338668,E-mail:zzhenggan@buaa.edu.cn

    通讯作者:

    周正干,Tel.:010-82338668,E-mail:zzhenggan@buaa.edu.cn

  • 中图分类号: TB553

Application of synthetic aperture focusing technique to defect quantification for immersion ultrasonic testing

Funds: Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (U1430120)
  • 摘要: 针对水浸超声检测常用缺陷定量方法存在成本高或缺陷定量误差较大的问题,提出一种将原始检测数据经频域合成孔径聚焦技术(FSAFT)处理后再运用半波高法进行缺陷定量评价(FSAFT-DQM)的新方法。建立了水浸超声点聚焦探头FSAFT成像方法,制备了横通孔和平底孔试样,开展了FSAFT-DQM缺陷定量评价试验研究。试验结果表明:FSAFT-DQM缺陷定量精度受检测深度影响不明显;当扫描步距不大于探头中心频率对应的半波长时,与半波高法相比,平底孔试样FSAFT-DQM缺陷定量误差由71.9%降低到10.0%以内;扫描步距在探头中心频率对应的半波长到波长之间时,图像频域插值算法将平底孔试样FSAFT-DQM缺陷定量误差由17.2%降低到5.6%。研究结果表明:FSAFT-DQM能有效提高缺陷定量精度。

     

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出版历程
  • 收稿日期:  2015-09-15
  • 网络出版日期:  2016-10-20

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