Infrared and Laser Engineering, Volume. 51, Issue 7, 20210533(2022)

Optimization of the laser-EMAT detection system based on FEM

Penghui Zhang1, Yang Zhao2, Peng Li1, Zhiquan Zhou2, Xue Bai1, and Jian Ma1
Author Affiliations
  • 1Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250104, China
  • 2School of Information Science and Engineering, Harbin Institute of Technology (Weihai), Weihai 264209, China
  • show less
    Figures & Tables(16)
    Diagram of laser-electromagnetic ultrasonic
    Working principle of EMAT receiving transducer
    Diagram of the simulation geometric model
    Energy distribution of Gaussian pulse beam for temporal and spatial
    Magnetic flux density distribution of permanent magnet
    Magnetic flux density below the coils
    Temperature rise curves of irradiated surface center
    Directivity of longitudinal wave
    Vertical displacements of different nodes
    Coil voltages of different nodes
    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
    Influence of lift-off distance on voltage amplitude of coil
    Voltage waveform of different nodes
    Effect of detection distance on sensitivity
    • Table 1. Basic physical parameters of materials

      View table
      View in Article

      Table 1. Basic physical parameters of materials

      ParameterValue
      Thermal conductivity κ/W·m−1·K−1238
      Heat capacity C/J·kg−1·K−1900
      Thermal expansion α/K−12.31×10−5
      Density ρ/kg·m−32700
      Modulus of elasticity E/Pa 7.02×1010
      Poisson ratio0.33
      Electrical conductivity σ/S·m−13.774×107
    • Table 2. Influence of coil lift-off distance on transducer sensitivity

      View table
      View in Article

      Table 2. Influence of coil lift-off distance on transducer sensitivity

      Coil lift-off distance t1/mm Voltage/V
      0.05188.63
      0.1060.04
      0.1550.50
      0.2041.78
      0.2535.55
      0.3031.77
    Tools

    Get Citation

    Copy Citation Text

    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

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Lasers & Laser optics

    Received: Aug. 4, 2021

    Accepted: --

    Published Online: Dec. 20, 2022

    The Author Email:

    DOI:10.3788/IRLA20210533

    Topics