传感技术学报2011，Vol.24Issue(1)：30-35,6.DOI:10.3969/j.issn.1004-1699.2011.01.007
非导磁金属隔层对差动变压器式位移传感器的影响
The Effect of Non-Magnetic Metal Interlayer on the Differential Transformer Displacement Sensor*
摘要
Abstract
The effect of non-magnetic metal interlayer located between the transformer core and iron on the performance of the differential transformer displacement sensor was studied. The displacement sensor output model was deduced through analyzing the generated eddy current on the added non-magnetic metal interlayer. And the influences of the non-magnetic metal interlayer conductivity, coil excitation frequency and the distance between the interlayer and coil on the sensor performance were simulated in MATLAB. The relevant experiments were taken out to validate the simulation results. The results show that the sensor linearity reached ± 1.02％ and the sensitivity was 20.7 mV/μm while the interlayer material was brass,the coil exciting frequency was 10 kHz, the distance between interlayer and coil was 0.15 mm and the test range was between -0.5 mm and ＋0.5 mm. The transformer displacement sensor sensitivity decreased 8.18％ while the linearity increased 38.7％ because of the added nonmagnetic metal interlayer. This research provides a theoretical and experimental basis for the use of differential transformer displacement sensor in magnetic bearing system mainly adopted in special applications.关键词
差动变压器/非导磁金属/隔层/位移传感器/磁悬浮轴承Key words
differential transformer/ non-magnetic metal /interlayer/ displacement sensor/ active magnetic bearing分类
信息技术与安全科学引用本文复制引用
金超武,徐龙祥,丁嵩..非导磁金属隔层对差动变压器式位移传感器的影响[J].传感技术学报,2011,24(1):30-35,6.基金项目
江苏省"333高层次人才培养工程"资助项目([2009]53号) （[2009]53号）
江苏省产学研联合创新资金资助(By2009101) （By2009101）
江苏省自然科学基金资助(BK2007590) （BK2007590）
航空科学基金资助(2008ZB52018) （2008ZB52018）
