磁聚焦式扭矩传感器聚焦装置的仿真分析  

Simulation analysis of focusing device of magnetic focusing torque sensor

作　　者：李志鹏[1] 王博男 孟旭 朱世宁 刘杰 LI Zhipeng;WANG Bonan;MENG Xu;ZHU Shining;LIU Jie(School of Traffic and Transportation,Northeast Forestry University,Harbin 150040,China;College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学交通学院,黑龙江哈尔滨150040 [2]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《传感器与微系统》2022年第11期31-34,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金面上资助项目(52175497);中央高校基本科研业务费专项资助项目(2572019CP04)。

摘　　要：针对现有磁聚焦线圈与转轴间隙较大时,聚焦磁场发散的问题,设计了一种新型导磁体,并提出了金属屏蔽层的构想。利用COMSOL仿真软件,分析了不同材质和不同尺寸的导磁体与屏蔽层对聚焦效果的影响,用逐点法挑选出聚焦效果最好的组合,构成聚焦装置。研究结果表明:在导磁体下方1~5 mm处,半径为1 cm的圆内形成有效的聚焦倍数,实现了磁聚焦式扭矩传感器对其下方一定的高度处确定面积内形成聚焦磁场的需求。引入屏蔽层后,减少了原有的漏磁,提高了中心聚焦度,聚焦倍数最高可达158.52,发展了静磁屏蔽的应用,解决了间隙增大磁场发散的缺陷。Aiming at the problem of divergence of focusing magnetic field when the gap between the existing magnetic focusing coil and rotating shaft is large, a new type of magnetizer is designed, and the conceive of a metal shielding layer is proposed.Using COMSOL simulation software, the effects of different materials and sizes of magnetizer and shielding layers on the focusing effect are analyzed, and the combination with the best focusing effect is selected by the point-by-point method to form the focusing device.The research results show that an effective focusing multiple is formed in a circle with a radius of 1 cm at 1~5 mm below the magnetizer, which fulfills the requirement of the magnetic focusing torque sensor to form a focusing magnetic field within a certain area below it at a certain height.After introducting shielding layer, original magnetic flux leakage is reduced, the central focusing degree is improved, and the maximum focusing multiple is up to 158.52.The application of magnetostatic shielding is developed, and the defect of gap enlargement and magnetic field divergence are solved.

关 键 词：磁聚焦 扭矩传感器 导磁体 COMSOL仿真软件 

分 类 号：TH89[机械工程—仪器科学与技术] TP212[机械工程—精密仪器及机械]