Air-coupled lamb wave tomography

被引：69

作者：

Wright, W ^{[1
]}

Hutchins, D ^{[1
]}

Jansen, D ^{[1
]}

Schindel, D ^{[1
]}

机构：

[1] QUEENS UNIV,DEPT PHYS,KINGSTON,ON K7L 3N6,CANADA

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1997年 / 44卷 / 01期

关键词：

D O I：

10.1109/58.585190

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

An entirely air-coupled inspection system using a pair of micromachined silicon capacitance transducers has been used to image defects in thin plates of different materials (0.7 mm to 2.22 mm thick) using air-coupled Lamb wave tomography. A Altered back projection algorithm was used in a form of difference tomography to reconstruct images of defects up to 10 mm diameter machined in aluminium and perspex (Plexiglas) plates, as well as in samples of carbon fiber reinforced polymer (CFRP). The technique was able to resolve non-central defects as well as multiple flaws within the scan area. This flexible tomographic system was able to produce images of the change in a variety of different acoustic variables from only one set of experimental data, with success dependent on the size, shape, and location of the defect in the scan area.

引用

页码：53 / 59

页数：7

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