高分辨磁旋转编码器磁鼓表露磁场分析与AMR检测磁头设计  

Analysis of Surface Magnetic Field on High-resolution Magnetic Rotary Encoders and Design for AMR Magnetic Heads

作　　者：王立锦[1] 胡强[2] 滕蛟[1] 朱逢吾[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中国科学院物理研究所磁学国家重点实验室,北京100080

出　　处：《北京科技大学学报》2004年第5期498-501,532,共5页Journal of University of Science and Technology Beijing

基　　金：国家"863"高技术研究发展计划(No.2003AA325010)

摘　　要：应用静磁场理论分析了高分辨磁旋转编码器磁鼓的表露磁场,通过数值计算得到磁鼓表露场分布的直观曲线.设计制作出性能优良的磁旋转编码器AMR检测磁头,理论分析结果与对磁鼓表露磁场的实际测试结果进行了分析对比.结果表明,AMR检测磁头输出信号形状与幅度及其倍频特性与理论计算结果是相符的.Based on the theory of static magnetic field, the surface magnetic field on the high-resolution multi-pole magnetic drum for a magnetic rotary encoder was analyzed. The visual curves of the surface magnetic field distribution were obtained by numerical calculation and plotting. A good AMR magnetic head for the magnetic rotary encoder was designed. The results of theoretical analysis and practical test were contrasted. The results are accorded in the output signal's shape and amplitude of the AMR magnetic head and its multi-frequency characteristic.

关 键 词：磁性旋转编码器 各向异性磁电阻(AMR) 磁电阻磁头 

分 类 号：O484.43[理学—固体物理]