An algorithm for the characterization of surface crack by use of dipole model and magneto-optical non-destructive inspection system

被引：19

作者：

Lee, J ^{[1
]}

Lyu, S ^{[1
]}

Nam, Y ^{[1
]}

机构：

[1] Lacomm Co Ltd, R&D Ctr, Kimhae 621200, Gyeongnam, South Korea

来源：

KSME INTERNATIONAL JOURNAL | 2000年 / 14卷 / 10期

关键词：

leakage magnetic flux (LMF); nondestructive evaluation (NDE); Faraday effect; magneto-optical sensor; dipole model;

D O I：

10.1007/BF03185061

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Leakage magnetic flux(LMF) is widely used for non-contact detection of cracks. The combination of optics and LMF offers advantages such as real time inspection, elimination of electrical noise, high spatial resolution, etc. This paper describes a new nondestructive evaluation method based on an original magneto-optical inspection system, which uses a magneto-optical sensor, LMF, and an improved magnetization method The improved magnetization method has the following characteristics: high observation sensitivity, independence of the crack orientation, and precise transcription of the geometry of a complex crack. The use of vertical magnetization enables the visualization of the length and width of a crack. The inspection system provides the images of the crack, and shows a possibility for the computation of its depth.

引用

页码：1072 / 1080

页数：9