设计一种用于人工心脏的非接触式涡电流位移传感器.针对人工心脏磁悬浮系统特有的钛合金隔层结构,采用有限元分析涡电流位移传感器磁场,得到其结构参数;同时研制能实时监控传感器线圈绕制的装置,以提高线圈阻抗的一致性.经对传感器性能测试,结果显示所设计的涡电流位移传感器标准偏差为3.8％,灵敏度高于10％,能满足人工心脏磁悬浮系统的要求.%Noncontact eddy current displacement sensor was designed for the Maglev system of the ventricle assist device ( VAD). With regard to the special structure in which there was a titanium alloy frame between the displacement sensor and VAD's rotor,this paper analyzed the sensor magnetic field by using finite element method to obtain structural parameters of sensor, built a device to monitor coil winding for improving the impedance consistency. Performance test of sensor coils shows that the standard deviation of sensor coils is 3. 8% , the sensitivity is higher than 10% ,and the good properties are feasible for the Maglev system of VAD.
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