中文摘要：

针对非接触变压器结构形式的铁磨粒传感器,由于存在漏磁较大、初次级线圈的耦合系数低导致的传感器灵敏度不高等问题,为此,需要对其结构进行优化。给出了铁磨粒传感器的检测机理,分析了影响传感器灵敏度的各种参数,采用ANSYS软件对该传感器进行了磁场-电路耦合有限元仿真与分析,提出了提高传感器灵敏度的优化结构和方法。仿真和实验结果表明：优化后的传感器在体积上大幅度缩减,灵敏度显著提高。

英文摘要：

The sensitivity of ferrous wear debris sensor which adopts transform structure is generally low due to strong flux leakage and weak coupling coefficient between the primary and the secondary windings,therefore,the structure of the sensor needs to be modified and optimized to improve its sensitivity.Firstly the measuring principle of this kind of contactless sensor to detect ferrous wear debris is presented.Secondly it is investigated main factors which affect the sensitivity of the sensor using combined simulation of magnetic field and electronic field based on finite element analysis（FEA）by ANSYS.Then optimal methods and a novel structure for the sensor are proposed.The design and experiment results show that the volume of the optimized sensor has significantly been decreased,and the sensitivity has obviously been increased.