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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Influence of the PZT Sensor Array Configuration on Lamb Wave Tomography Imaging with the RAPID Algorithm for Hole and Crack Detection
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Influence of the PZT Sensor Array Configuration on Lamb Wave Tomography Imaging with the RAPID Algorithm for Hole and Crack Detection

机译：PZT传感器阵列配置对使用RAPID算法进行孔和裂纹检测的Lamb Wave层析成像的影响

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The tomography technique is an effective way to quantitatively evaluate damage from reconstruction imaging in structure health monitoring (SHM). The reconstruction algorithm for the probabilistic inspection of damage (RAPID) algorithm based on the signal difference coefficient (SDC) feature is a promising approach due to its superior performance. This paper focuses on the influence of different patterns of PZT (Lead Zirconate Titanate) sensor array configurations, i.e., the circular, square, and parallel array, on reconstruction image qualities for evaluating hole and crack damage. Variable shape parameters are applied to account for the unequal damage distances of different actuator-sensor pairs. Considering the directionality scattering fields of cracks, the angular scattering pattern of the SDC values are studied by simulation. The SDC variations for different groups of sensing paths at the same actuator are applied to predict the crack orientation. An improved RAPID algorithm is proposed by defining an additional SDC value of 1 in the path along the predicted crack orientation, which is determined by the point of the actuator causing the minimal SDC variation and the center point of the initial reconstruction image of the crack. The results show that the improved RAPID algorithm is effective for the evaluation of crack damage. Reconstruction image qualities with three PZT sensor array configurations for both holes and cracks are compared. The research is significant for selecting the PZT sensor array configuration in SHM.
机译：层析成像技术是定量评估结构健康监测（SHM）中重建成像造成的损害的有效方法。基于信号差系数（SDC）特征的概率概率损伤检测重建算法（RAPID）是一种有前途的方法。本文重点研究PZT（铅锆钛酸铅）传感器阵列配置的不同模式（即圆形，方形和平行阵列）对重建图像质量的影响，以评估孔和裂纹损伤。应用可变形状参数来解决不同执行器-传感器对的不相等损坏距离。考虑到裂纹的方向性散射场，通过仿真研究了SDC值的角度散射模式。在同一执行器上，针对不同组检测路径的SDC变化可用于预测裂纹方向。提出了一种改进的RAPID算法，方法是在沿预测裂纹方向的路径中定义一个额外的SDC值1，该值由导致最小SDC变化的执行器点和裂纹的初始重建图像的中心确定。结果表明，改进的RAPID算法对裂纹损伤的评估是有效的。比较了针对孔和裂纹的三种PZT传感器阵列配置的重建图像质量。该研究对于选择SHM中的PZT传感器阵列配置具有重要意义。

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