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Shape reconstruction of mixed type void flaws using Born inversion method

机译：Born反演方法重建混合型空隙缺陷的形状

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摘要

We study an approximate technique for determining the shapes of mixed type void flaws in elastic media from knowledge of the ultrasonic scattering amplitudes. It is well known that the technique is highly effective under weak scattering conditions. In the paper, two cement paste cylindrical specimens with mixed type void flaws are prepared and ultrasonic measurements are carried out by experimental means. The measurement area is restricted in the plane perpendicular to the axis of cylindrical specimen. The measured wave data are fed into the approximate technique formula--the Born inversion method and cross-sectional image is obtained. We find that good results have been obtained for strong scattering void flaws such as mixed type void flaws in cement paste cylindrical specimens.
机译：我们研究了一种基于超声散射振幅知识确定弹性介质中混合型空隙缺陷的形状的近似技术。众所周知，该技术在弱散射条件下非常有效。在本文中，准备了两个具有混合型空隙缺陷的水泥浆圆柱样品，并通过实验手段进行了超声波测量。测量区域被限制在垂直于圆柱试样轴线的平面上。将测得的波数据输入近似的技术公式-Born反演方法并获得横截面图像。我们发现，对于强力散射空隙缺陷（例如水泥浆状圆柱试样中的混合型空隙缺陷）已经获得了良好的结果。

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