Real-time Compensation Method of Magnetic Heading Perturbations Based on Magnetic Anomaly Inversion
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摘要: 针对磁航向估计受浅场磁异常干扰的问题,提出了一种基于磁异常反演的磁航向误差实时补偿方法。该方法首先利用设计的新型磁传感器阵列测量磁异常源产生的磁梯度张量数据,然后联合位置、磁矩及磁标量信息进行浅场磁异常三维磁矢量的单点反演,最后在背景地磁矢量场准确估计的基础上完成磁航向误差的实时补偿。实验结果表明,该方法可实现存在浅场地磁异常情况下的磁航向准确估计。Abstract: In order to eliminate magnetic heading perturbations coming from the near-field magnetic anomaly, a real-time compensation method is proposed based on magnetic anomaly inversion. Magnetic gradient tensor data arisen near-field ferromagnetic targets was measured by the designed magnetometer array. Then position, magnetic moment, and magnetic scalar values were combined to calculate magnetic vectors of the ferromagnetic targets. Real-time compensation was achiev
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图 2 地磁矢量以及其和地理北的关系
Figure 2. Magnetic Field Components and Their Relationship with True North
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图 5 张量不变量及补偿前后的方位角(测线1)
Figure 5. Tensor Invariants and Heading Angle Before and After Compensation (the First Measurement Line)
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