基于磁偶极子的磁场梯度张量局部缩并及试验验证

发布时间：2018-04-01 18:53

本文选题：磁偶极子　切入点：磁场梯度张量　出处：《中国惯性技术学报》2017年04期

【摘要】：基于磁偶极子的磁场梯度张量缩并理论虽然可较好地描述磁源,不受测量系统的朝向的影响,但在实际的磁场梯度张量测量中通常仅可测得部分磁场梯度参数,没有获得磁场梯度张量中的所有张量分量,如何有效利用这些部分磁场梯度参量,已成为目前磁场梯度张量缩并理论及在磁场定位的应用中亟需解决的问题。基于磁偶极子理论提出磁场梯度张量局部缩并的方法,给出磁场梯度张量的局部模量的概念,分析了磁场梯度张量的局部模量及相关参数的三维空间分布规律,结果表明:局部模量CXY及kXY值随着g先增大后减小,在g=39°时取最大值,在g=90°时取最小值;局部模量C_Z及k_Z值随着g先减小后增大,在g=63°时取最小值,在g=0°时取最大值。提出磁场梯度张量局部模量中重要参数的近似计算公式,并通过试验进行验证。试验结果表明,试验值与理论计算值基本一致,可为磁场梯度张量局部缩并理论的应用提供依据和参考。
[Abstract]:Although Zhang Liang's contraction theory of magnetic field gradient based on magnetic dipole can describe the magnetic source well and is not affected by the orientation of the measuring system, only a part of the magnetic field gradient parameters are usually measured in actual magnetic field gradient Zhang Liang measurement.We have not obtained all the Zhang Liang components in the magnetic field gradient Zhang Liang. How to make effective use of these partial magnetic field gradient parameters has become a problem that needs to be solved in the theory of shrinking magnetic field gradient and its application in magnetic field localization.Based on the theory of magnetic dipole, the method of local contraction of magnetic field gradient Zhang Liang is put forward, and the concept of local modulus of magnetic field gradient Zhang Liang is given, and the local modulus of magnetic field gradient Zhang Liang and the three dimensional spatial distribution of related parameters are analyzed.An approximate formula for calculating the important parameters in the local modulus of the magnetic field gradient Zhang Liang is proposed and verified by experiments.
【作者单位】：西南大学工程技术学院;南洋理工大学土木与环境工程学院;武汉大学土木建筑工程学院;
【基金】：国家自然科学基金(51208078) 重庆市前沿与应用基础研究计划(cstc2015jcyj A30008) 中央高校基本科研业务费专项资金(XDJK 2015B007)
【分类号】：TM153;TM936

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