电涡流传感器的电磁场分布对传感器的灵敏度有重要影响，目前均将被检测体假设为平板导体进行电磁场仿真，并未考虑被测体为球体时其曲率半径对电涡流传感器灵敏度的影响。基于电涡流传感器的原理，利用有限元方法对电涡流传感器检测球体的电磁场分布进行了数值仿真分析，仿真结果与经典的电涡流理论相符，并由此验证模型的正确性。通过对不同曲率的球体进行电磁场仿真，研究分析了球体曲率对传感器灵敏度的影响，理论上为电涡流传感器检测球体零件时的优化设计提供了参考。%The electromagnetic field distribution of eddy current sensor has important influence on the sensitivity of thesensor .At present, the electromagnetic field simulation analysis was carried out on the assumption that the detected body was theplane conductor, but it does not take into account the impact of the curvature radius on the sensitivity of the eddy current sensorwhen the detected body is sphere.Based on the principle of eddycurrent sensor, numerical simulation analysis to the electromagneticfield distribution of the eddy current sensor detecting sphere is conducted by using the FEM.The simulation resultsare consistent with the classical eddy current theory, thus the correctness of the model is verified.Through electromagneticfield simulation to the spheres of different curvature, effect of the spherical surface curvature onthe performance of sensor isstudied and analyzed, so as to provide the reference for optimization design of eddy current sensor detecting sphere.
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