摘要
磁性目标定位方法在很多领域都有重要的应用价值,如航空磁性探测,地下矿产检测等。当磁传感器与磁性目标的距离足够远时,磁性目标可以等效成磁偶极子,通过磁传感器测量磁场值和磁场梯度值,依据算法得出定位结果,并对定位误差进行了分析,主要是系统误差和随机误差的分析。通过对传感器间距(即基线距离)引起的误差进行分析,提出使用迭代校正方法对误差进行修正,对于磁矩强度为2 Am^2的磁偶极子,在70 cm范围内不同基线距离的梯度传感器通过迭代校正方法可以将误差由10%以上降低到5%以下;通过对磁性目标磁矩方向引起的误差进行分析,提出使用广义逆矩阵法来消除磁矩方向变化引起的盲区问题,由此可以实现无盲区的探测。
Magnetic target location method has important application in many fields, such as aerospace magnetic detection, underground mineral detection. Normally, when the distance between the gradiometer and the magnetic target is long enough, the magnetic target can be equivalent to a magnetic dipole. The magnetic field and magnetic field gradient is obtained by using magnetic sensor, and the location result is gotten by an algorithm. The location error mainly including system error and random error is analyzed. The error caused by the baseline distance is analyzed, and the error is corrected by the iterative correction method. For the magnetic dipole with magnetic moment intensity of 2 Am2 , the distance error can be reduced to 5% by the iterative correction method with range of 70 cm. A generalized inverse matrix is proposed to eliminate the blind zone caused by the change of magnetic moment direction, and the target can be detected without blind.
出处
《电子测量与仪器学报》
CSCD
北大核心
2017年第11期1719-1724,共6页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(61473023)资助项目
关键词
磁性目标定位
磁场梯度
定位误差
误差修正
magnetic target location
magnetic field gradient
location error
error correction
