Abstract
Magnetic anomaly detection is a widely used detection method. Because magnetic detection is not affected by soil, water and other media, it is widely used in prospecting, positioning and other fields. Magnetic gradient tensor, as a new detection method, can realize the inversion of the target position by measuring the change rates of the three components of the magnetic field in three directions. It has good mathematical characteristics and is a research hotspot in the field of magnetic detection. In this paper, the magnetic gradient tensor based target location technology is studied for weak magnetic target location, and a target location algorithm based on magnetic gradient tensor information is proposed. A corresponding location system is built with AMR magnetic sensor, which can achieve accurate location of magnetic anomaly targets within 0.25m.
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