CAJ | 학술논문

针对微型磁传感器对弱磁场测量灵敏度低的问题，利用软磁材料对外磁场的集聚放大作用来提高磁测系统的灵敏度。重点针对T-形磁通集聚器的轴向磁场放大特性及影响因素进行了分析，并设计了相应的磁通集聚器并进行试验测试。试验表明所设计的T-形磁通集聚器具有很好的磁场线性放大作用，可用于提高弱磁场的测量精度。磁力线在磁通集聚结构内部流动的过程中发生了磁通泄漏现象；T-形磁通集聚器对外部磁场放大了约21倍；磁通集聚器的相对磁导率及空气间隙与外部磁场的放大倍数都呈非线性的关系，结构的长宽之比与外部磁场的放大倍数呈单调递增关系，结构厚度对其几乎没有影响。该研究结果能够为磁通集聚器结构设计及优化方面提供一定的参考价值。
침대미형자전감기대약자장측량령민도저적문제，이용연자재료대외자장적집취방대작용래제고자측계통적령민도。중점침대T-형자통집취기적축향자장방대특성급영향인소진행료분석，병설계료상응적자통집취기병진행시험측시。시험표명소설계적T-형자통집취기구유흔호적자장선성방대작용，가용우제고약자장적측량정도。자력선재자통집취결구내부류동적과정중발생료자통설루현상；T-형자통집취기대외부자장방대료약21배；자통집취기적상대자도솔급공기간극여외부자장적방대배수도정비선성적관계，결구적장관지비여외부자장적방대배수정단조체증관계，결구후도대기궤호몰유영향。해연구결과능구위자통집취기결구설계급우화방면제공일정적삼고개치。
For the problem of weak magnetic field measurement with low sensitivity,soft magnetic materials which had the property of magnetic field amplification were used to improve the sensitivity of magnetic measurement sys?tem. The axial magnetic field amplification characteristics and influence factors of T-shape magnetic flux concentra?tor were analyzed,and then the corresponding magnetic flux concentrator was designed and tested. Experiments show that the T-shape magnetic flux concentrator has good magnetic field linear amplification,it can be used to im?prove the measurement accuracy of weak magnetic field. In the process of magnetic flux gathering structure internal flow occurs in magnetic flux leakage,T-shape flux concentrator enlarges the external magnetic field about 21 times. The relationship relative permeability of the magnetic flux concentrator and the air gap between the external magnet?ic field is nonlinear,the ratio of the length and width of the structure increases monotonically with the amplification of the external magnetic field,the structural thickness has little effect on the amplification of the external magnetic field. The results of this research can provide a reference for the structure design and optimization of magnetic flux concentrator.