电流参数对基波正交磁通门传感器灵敏度的影响  

Influence of Current Parameters on Sensitivity of Fundamental Mode Orthogonal Fluxgate

作　　者：李强[1] 武靖博 李跃 曹妍 满其奎 林新华[3] LI Qiang1,WU Jing-bo2,3,LI Yue1,CAO Yan2,3,MAN Qi-kui4,LIN Xin-hua3(1.School of Machinery Engineering,Hefei University of Technology,Hefei 230009,China;2.School of Automobile andTransportation Engineering,Hefei University of Technology,Hefei 230009,China;3.State Key Laboratory of TransducerTechnology,Hefei Institute of Intelligent Machines,CAS,Hefei 230031,China;4.Key Laboratory of Magnetic Materials andDevices,Ningbo Institute of Materials Technology and Engineering,CAS,Ningbo 315201,Chin)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009 [2]合肥工业大学汽车与交通工程学院,安徽合肥230009 [3]中国科学院合肥智能机械研究所传感技术国家重点实验室,安徽合肥230031 [4]中国科学院宁波材料技术与工程研究所磁性材料与器件重点实验室,浙江宁波315201

出　　处：《仪表技术与传感器》2018年第6期105-108,共4页Instrument Technique and Sensor

摘　　要：为了研究激励电流参数对基波正交磁通门灵敏度的影响,利用钴基合金磁芯和单线圈构建基波正交磁通门。实验结果表明,增加激励电流振幅(Iac),会改善基波正交磁通门的灵敏度;然而,随着激励电流偏置(Idc)增加,基波正交磁通门灵敏度下降;激励频率对灵敏度影响相对复杂。随着频率的增加,灵敏度呈现先增加后降低的趋势,存在一个最佳频率。该频率大小近似等于基波正交磁通门线圈等效LC电路的谐振频率(fo)。基于旋转磁化理论和等效电路模型对上述实验结果进行了分析。该项研究对优化传感器灵敏度,提高正交磁通门信噪比具有指导作用。In order to investigate the influence of excitation current parameters on the sensitivity of fundamental mode orthogonal fluxgate（ FM-OFG）,a FM-OFG with a Co-based amorphous wire and a pick-up coil was fabricated. The experimental result showed that the sensitivity of FM-OFG was improved with the amplitude increase of AC excitation current. However,adding larger DC bias to AC excitation current made the sensitivity decrease. Operation frequencies had a complicated impact on the sensitivity. In the frequency spectrum,the maximum sensitivity existed near the LC resonance frequency of OFG coil. The above results were analyzed based on the magnetic rotation model and equivalent circuit model. This study may play a guiding role in improving sensitivity and signal noise ratio.

关 键 词：正交磁通门 基波模式 激励电流参数 灵敏度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]