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中文摘要：
在电感式磨粒传感器中，非铁磁质磨粒主要通过涡流效应改变传感器线圈的磁场分布，进而改变线圈的等效电感。建立传感器线圈时谐电磁场与非铁磁质球磨粒耦合关系的有限元模型，模型计算结果表明：磨粒感应出的涡流场减小了磨粒内部的磁感应强度，同时改变了磨粒外部磁感应强度；磨粒引起传感器线圈电感变化率随线圈激励频率的增加而增大，并趋向于一极限值；线圈电感变化率随磨粒半径的减小而迅速衰减。实验研究的结果证明了模型计算的正确性。
英文摘要：
When unferromagnetic wear debris is in the coil of inductive wear debris sensor, the magnetic field distribution of the coil is changed through eddy effect, and then the equivalent inductance of the coil is changed. The finite element model of coupling relationship between the coil of sensor and the unferromagnetic spherical wear debris is built. The computed results of the model show that the eddy field of the wear debris cut down the magneic induction density inside the wear debris, and the magnetic induction density outside the wear debris is changed. The change rate of sensor coil inductance increases with driven frequency increasing,and approaches a limit. And the rate of change of sensor coil inductance decreases quickly with wear debris＂ radius decreasing. The results of the test prove that the model is correct.
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