Flaw Shape Reconstruction from SH‐Wave Array Ultrasonic Data Using Time Domain Linearized Inverse Scattering Method
Flaw Shape Reconstruction from SH‐Wave Array Ultrasonic Data Using Time Domain Linearized Inverse Scattering Method
复制标题
使用时域线性逆散射方法从 SH 波阵列超声数据重建缺陷形状
DOI：
10.1063/1.1916760
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Hirose
中科院分区：
文献类型：
--
作者：
K. Kimoto;S. Hirose
本文提出了一种线性化逆散射方法，即Kirchhoff反演，该方法在时域内用于接触式超声换能器测量的SH - wave，并使用实验数据进行了测试。重建的数据是通过测量钢板试样中人为缺陷的超声回波实验得到的。为了有效和准确地收集数据，使用了接触式SH波线性阵列传感器。通过基尔霍夫反演和传统的合成孔径聚焦技术（SAFT），利用单一射线路径的波重构了人工缺陷的形状。两种方法的比较表明，Kirchhoff反演对实验数据的效果很好，并且优于SAFT，尽管两种方法都只能重建缺陷边界的照亮部分。为了获得更多的缺陷边界信息，还对考虑多射线路径的Kirchhoff反演进行了相同的实验数据测试。因此，它……
A linearized inverse scattering method, so called the Kirchhoff inversion, is formulated in time domain for SH‐waves measured by a contact ultrasonic transducer and tested using experimental data. The data for reconstruction are experimentally obtained by measuring ultrasonic echoes from artificial flaws in steel plate specimens. For an efficient and accurate data collection, a contact SH‐wave linear array transducer is used. The shapes of the artificial flaws are reconstructed by the Kirchhoff inversion and the conventional SAFT (Synthetic Aperture Focusing Technique) using the waves from a single ray path. Comparison of the two methods shows that the Kirchhoff inversion works well for experimental data and outperforms SAFT although only an illuminated portion of the flaw boundaries is reconstructed by either method. In order to gain more information on the flaw boundaries, the Kirchhoff inversion which takes into account multiple ray paths is also tested with the same experimental data. As a result, it ...