Penghui Zhang, Yang Zhao, Peng Li, Zhiquan Zhou, Xue Bai, Jian Ma. Optimization of the laser-EMAT detection system based on FEM[J]. Infrared and Laser Engineering, 2022, 51(7): 20210533
- Infrared and Laser Engineering
- Vol. 51, Issue 7, 20210533 (2022)
Fig. 1. Diagram of laser-electromagnetic ultrasonic
Fig. 2. Working principle of EMAT receiving transducer
Fig. 3. Diagram of the simulation geometric model
Fig. 4. Energy distribution of Gaussian pulse beam for temporal and spatial
Fig. 5. Magnetic flux density distribution of permanent magnet
Fig. 6. Magnetic flux density below the coils
Fig. 7. Temperature rise curves of irradiated surface center
Fig. 8. Directivity of longitudinal wave
Fig. 9. Vertical displacements of different nodes
Fig. 10. Coil voltages of different nodes
Fig. 11. Influence of permanent magnet size on magnetic field. (a) Influence of magnet height on edge magnetic field; (b) Influence of magnet height on central magnetic field; (c) Influence magnet width on edge magnetic field; (d) Influence of magnet width on central magnetic field
Fig. 12. Influence of lift-off distance on voltage amplitude of coil
Fig. 13. Voltage waveform of different nodes
Fig. 14. Effect of detection distance on sensitivity
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Table 1. Basic physical parameters of materials
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Table 2. Influence of coil lift-off distance on transducer sensitivity
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