【摘要】 为实现多阶磁梯度张量的准确测量,提出一种磁传感器阵列。阵列由9个三轴磁传感器组成,在平面呈菱形排列。根据张量对称性,提出一阶及二阶磁梯度张量计算方法。采用Floater-Hormann有理插值完成测量盲点的修正。根据磁偶极子原理建立仿真模型,研究阵列在地磁场和噪声背景下的一阶及二阶磁梯度张量测量精度。仿真结果表明,提出阵列在磁梯度张量测量精度、完整性方面优于十字形阵列和六面体阵列。基于一阶和二阶磁梯度张量的定位应用也可证明所提出阵列的有效性。更多还原

【Abstract】 A magnetic sensor array was proposed to measure multiple-order magnetic gradient tensor(MGT)accurately. The array was composed of 9 three-axis magnetic sensors and arranged in the form of diamond on the plane. According to tensor symmetry, the calculation method of different-order MGT was proposed.Floater-Hormann rational interpolation was adopted to complete blind spot amendment. According to simulation model based on magnetic dipole theory, the effectiveness of first-order and second-order MGT was researched under geomagnetic field and noise backgrounds. The simulation results showed that the proposed array outperforms cross and hexahedron array in terms of measurement precision and integrity. The application of magnetic source positioning based on first-order and second-order MGT was carried out to illustrate the proposed array of effectiveness.更多还原