Ply wrinkling in carbon fibre reinforced polymer (CFRP) laminates is often geometrically complex and difficult to quantify using non-destructive techniques. In this paper, an ultrasonic technique for mapping ply wrinkling is presented. The instantaneous-phase three-dimensional dataset obtained from a pulse-echo ultrasonic inspection is processed using the structure-tensor image processing technique to quantify the orientations of the internal plies of a CFRP laminate. It is shown that consideration must be given to the wrapped nature of the phase dataset during processing to obtain accurate orientation maps. Three dimensional ply orientation and ply-location maps obtained from a test coupon are compared with true ply angles and locations by overlaying the ultrasonically-derived results on X-ray CT image slices, showing that accurate orientation maps can be obtained using the proposed technique.

碳纤维增强聚合物（CFRP）层压板中的起皱通常在几何上很复杂，并且难以使用无损技术进行量化。在本文中，提出了一种用于绘制层褶皱的超声技术。使用结构张量图像处理技术处理从脉冲回波超声检查获得的瞬时三维数据集，以量化CFRP层压板内部层的方向。结果表明，在处理过程中必须考虑相位数据集的包装特性，以获得准确的方向图。通过将超声得出的结果叠加在X射线CT图像切片上，将从测试试样获得的三维层定向和层位置图与真实层角度和位置进行比较，