Eddy current testing is a non-destructive testing method, which is usually used for an examination of thin metal material. It can acquire the coil impedance variety between the eddy current magnetic field and the coil magnetic field by electromagnetic induction. By prognosticating its phase angle, testing can exam the influence of the examination through the impedance plane diagram. However, the eddy current testing is usually influenced by different types of the defects and factors of examination.
The purpose of this study is to analyze the examination factors of eddy current testing accuracy by means of the finite element method (FEM). This study is to create two dimensional axial symmetry model of simplification in eddy current testing by finite element software package Femlab. After that, the researcher applied the mathematics software package Matlab to plot the impedance plane diagram and evaluation curve. Furthermore, the researcher analyzed the impedance plane diagram and evaluation curve in different examination factors.
After the FEM simulation in different types of the defects and the examination factors, this study can provide many comparable data for experimentalists, to judge the condition of the defects more correctly and to reduce testing errors more effectively in the eddy current testing.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0809106-213106 |
| Date | 09 August 2006 |
| Creators | Lin, Chih-sheng |
| Contributors | Shi-Pin Ho, Jin-Jhy Jeng, Shyue-Jian Wu, Shiuh-Kuang Yang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0809106-213106 |
| Rights | campus_withheld, Copyright information available at source archive |
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