Abstract
The deficiency of designing theories of electromagnetic acoustic transducers (EMATs) severely confines the further expansion of their scope of application. To thoroughly solve this problem, this paper built a 3-D finite element model of an surface wave EMAT used for the surface inspection of aluminum plates. Simulation analysis of the model revealed that transduction efficiency of the EMAT was greatly affected by EMAT parameters. As a consequence, based on the established model and by utilizing orthogonal test method, this paper extracted EMAT's key parameters that significantly influenced the transduction efficiency of the transducer; obtained the basic designing principle of the EMAT; and accomplished the optimum design of the EMAT by studying the coil and the magnet individually. Experiment indicated that after optimization the amplitude of the EMAT-received signal increased by 2.99 times. The transduction efficiency of EMATs can be effectively improved by utilizing orthogonal test method based on 3-D finite element model.
| Original language | English |
|---|---|
| Pages (from-to) | 123-128 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao |
| Volume | 29 |
| Issue number | 30 |
| Publication status | Published - 25 Oct 2009 |
Keywords
- 3-D finite element analysis
- Electromagnetic acoustic transducer
- Key parameter
- Optimum design
- Orthogonal test design