Sui Hao, Xu Pan, Huang Jinxing, Zhu Hongna
School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China.
School of Meteorology and Ocean, National University of Defense Technology, Changsha 410073, China.
Sensors (Basel). 2020 Dec 24;21(1):55. doi: 10.3390/s21010055.
Plane wave imaging (PWI) is attracting more attention in industrial nondestructive testing and evaluation (NDT&E). To further improve imaging quality and reduce reconstruction time in ultrasonic imaging with a limited active aperture, an optimized PWI algorithm was proposed for rapid ultrasonic inspection, with the comparison of the total focusing method (TFM). The effective area of plane waves and the space weighting factor were defined in order to balance the amplitude of the imaging area. Experiments were carried out to contrast the image quality, with great agreement to the simulation results. Compared with TFM imaging, the space-optimized PWI algorithm demonstrated a wider dynamic detection range and a higher defects amplitude, where the maximum defect amplitude attenuation declined by 6.7 dB and average attenuation on 12 defects decreased by 3.1 dB. In addition, the effects of plane wave numbers on attenuation and reconstruction time were focused on, achieving more than 10 times reduction of reconstruction times over TFM.
平面波成像（PWI）在工业无损检测与评估（NDT&E）中受到越来越多的关注。为了在有限有源孔径的超声成像中进一步提高成像质量并减少重建时间，针对快速超声检测提出了一种优化的PWI算法，并与全聚焦方法（TFM）进行了比较。定义了平面波的有效面积和空间加权因子，以平衡成像区域的幅度。进行了实验以对比图像质量，实验结果与模拟结果高度吻合。与TFM成像相比，空间优化的PWI算法显示出更宽的动态检测范围和更高的缺陷幅度，其中最大缺陷幅度衰减降低了6.7 dB，12个缺陷的平均衰减降低了3.1 dB。此外，重点研究了平面波数量对衰减和重建时间的影响，重建时间比TFM减少了10倍以上。
