Improving the Lorentz Force Amplitude of an EMAT Using Stacked Coil Configuration
This research presents a study of a novel method of improving the Lorentz force amplitude of a planer spiral coil EMAT configuration by stacking the coils. A 2D axisymmetric Finite Element Model was developed to study and compare the density of the Lorentz Force (LF) generated at the skin depth by t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IFSA Publishing, S.L.
2013-08-01
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| Series: | Sensors & Transducers |
| Subjects: | |
| Online Access: | http://www.sensorsportal.com/HTML/DIGEST/august_2013/P_1313.pdf |
| Summary: | This research presents a study of a novel method of improving the Lorentz force amplitude of a planer spiral coil EMAT configuration by stacking the coils. A 2D axisymmetric Finite Element Model was developed to study and compare the density of the Lorentz Force (LF) generated at the skin depth by the Stacked Spiral-EMAT (SS-EMAT) configuration on cs70 grades of pipe steel materials. The response of the novel EMAT configuration to variation of parameters such as the static magnetic field, internal diameter, excitation frequency, lift-off, coil stacking, the thickness of the insulation layer and number of cycles per tone burst were also investigated to ascertain the viability of the Stacked Spiral-EMAT. The results obtained showed that there is a significant improvement in the density of Lorentz Force generated by the novel EMAT when stacked. Hence a new EMAT configuration is proposed to enhance the performance of radially polarised bulk wave EMATs.
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| ISSN: | 2306-8515 1726-5479 |