Multi-frequency eddy current NDE of the distance between parts in aeronautical assemblies

被引：0
|
作者：
Thanh Long Cung [1 ]
Joubert, Pierre Yves [1 ]
Vourc'h, Eric [1 ]
机构：
[1] CNRS, ENS Cachan, SATIE, UniverSud, F-94235 Cachan, France
来源：
ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XIV) | 2011年 / 35卷
关键词：
Non-destructive evaluation; eddy currents; multi-frequency approach; air gap estimation; multilayered aeronautical structure; behavioral inverse model;
D O I：
10.3233/978-1-60750-750-5-288
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
This paper deals with the eddy current nondestructive evaluation of the distance between parts in metallic assemblies. An experimental study of the coupling of a magnetic cup core coil sensor with a metallic layered structure is carried out and confirmed by finite element modeling simulations. This study allows behavioral models of the sensor/structure interactions to be built, and two estimation methods to be proposed. The first one is based on the inversion of a polynomial forward model, and the second one on an inverse model. Both techniques are implemented, characterized and compared. The second one is proved to be more accurate when the signal to noise ratio of the eddy current data decreases.
引用
收藏
页码：288 / 295
页数：8
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