| 张海燕,吕东辉,袁瀚贝.超声检测中的兰姆波层析成像[J].声学技术,2004,(3):138~140,145 |
| 超声检测中的兰姆波层析成像 |
| Lamb wave tomography in ultrasonic testing |
| 投稿时间：2003-07-23 修订日期：2003-10-30 |
| DOI： |
| 中文关键词: 兰姆波 层析成像 无损检测 |
| 英文关键词: Lamb waves tomography nondestructive testing |
| 基金项目:上海市教委发展基金资助(03AK48) |
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| 中文摘要: |
| 兰姆波作为超声导波,可以对薄板类结构实现大范围快速的检测。然而,从兰姆波数据中提取定量信息时对检测人员的技术素质提出了很高的要求。文章用兰姆波层析成像仿真实现了铝板中不同缺陷的重建图像。结果表明:采用滤波反投影算法得到的层析图像给出了关于缺陷位置和类型的信息,从而使技术人员可以方便地识别出材料中的缺陷。 |
| 英文摘要: |
| As ultrasonic guided waves, Lamb waves allow large sections of thin sheet structures to be rapidly inspected. However, extraction of quantitative information from Lamb wave data requires well-trained personnel with datailed knowledge of mechanical waveguide physics. Simulation of tomographic image reconstruction of different defects in thin aluminum using Lamb waves is described in this paper. The tomographic images obtained by using a filtered back projection algorithm can provide information concerning the location and nature of the defects, which can be interpreted by a technician. |
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