VP16-03 Research on magnetic interference compensation based on improved ellipsoidal fitting method
Creators: Beibei Fan
Jing Qiu
Cong Cao
Shuanglong Huang
Xinjie Zeng
Publisher: name: IEEE
Year: 2025

Magnetic anomaly detection technology has shown a wide range of application value in many fields such as underwater target detection and identification, mineral resource development, etc. As the carrier of the magnetic measurement system, the magnetic compensation technology can effectively eliminate the interference magnetic field of the platform, which is the core point of the magnetic anomaly detection technology, which directly affects the detection accuracy [1]. In this paper, the magnetic sensor interference, the maneuvering interference field and the geomagnetic gradient interference are improved on the original basis, and the research content includes the following three aspects: firstly, the magnetic interference mechanism of the magnetic measurement motion platform is analyzed, and the corresponding interference model is established. The interference mechanism of geomagnetic field, magnetic sensor and mobile interference field is studied, and the corresponding interference magnetic field model is established. Secondly, based on the method of improved ellipsoid fitting, the ellipsoid compensation parameters are obtained by using the least squares method, and the interference compensation algorithm of the ellipsoidal fitting magnetic sensor with the "optimal random selection" mechanism is proposed, which further improves the compensation accuracy of the magnetic sensor [2]. Finally, based on the improved Tolles-Lawson model, the influence of noise on the compensation is analyzed, the compensation parameters are solved by the fixed-point change measurement attitude experiment, and the geomagnetic gradient correction is integrated into the compensation process in the maneuvering experiment of the moving platform, so as to verify the compensation effect of the proposed method on the magnetic interference of the moving platform [3]. It provides reliable technical support for further research on magnetic field detection.References: [1]Alken P, Thébault E, Beggan C D, et al. International geomagnetic reference field: the thirteenth generation. Earth, Planets and Space, 2021, 73: 1-25. [2]Lee H, Lee C, Jeon H, et al. Interference-compensating magnetometer calibration with estimated measurement noise covariance for application to small-sized UAVs. IEEE Transactions on Industrial Electronics, 2019, 67(10): 8829-8840. [3]Li Y, Han Q, Li Q, et al. On the correction of the positional error caused by the coordinate origin in Tolley–Lawson model. IEEE Geoscience and Remote Sensing Letters, 2022, 19: 1-5.
Magnetic anomaly detection technology has shown a wide range of application value in many fields such as underwater target detection and identification, mineral resource development, etc. As the carrier of the magnetic measurement system, the magnetic compensation technology can effectively eliminate the interference magnetic field of the platform, which is the core point of the magnetic anomaly detection technology, which directly affects the detection accuracy [1]. In this paper, the magnetic sensor interference, the maneuvering interference field and the geomagnetic gradient interference are improved on the original basis, and the research content includes the following three aspects: firstly, the magnetic interference mechanism of the magnetic measurement motion platform is analyzed, and the corresponding interference model is established. The interference mechanism of geomagnetic field, magnetic sensor and mobile interference field is studied, and the corresponding interference magnetic field model is established. Secondly, based on the method of improved ellipsoid fitting, the ellipsoid compensation parameters are obtained by using the least squares method, and the interference compensation algorithm of the ellipsoidal fitting magnetic sensor with the "optimal random selection" mechanism is proposed, which further improves the compensation accuracy of the magnetic sensor [2]. Finally, based on the improved Tolles-Lawson model, the influence of noise on the compensation is analyzed, the compensation parameters are solved by the fixed-point change measurement attitude experiment, and the geomagnetic gradient correction is integrated into the compensation process in the maneuvering experiment of the moving platform, so as to verify the compensation effect of the proposed method on the magnetic interference of the moving platform [3]. It provides reliable technical support for further research on magnetic field detection.References: [1]Alken P, Thébault E, Beggan C D, et al. International geomagnetic reference field: the thirteenth generation. Earth, Planets and Space, 2021, 73: 1-25. [2]Lee H, Lee C, Jeon H, et al. Interference-compensating magnetometer calibration with estimated measurement noise covariance for application to small-sized UAVs. IEEE Transactions on Industrial Electronics, 2019, 67(10): 8829-8840. [3]Li Y, Han Q, Li Q, et al. On the correction of the positional error caused by the coordinate origin in Tolley–Lawson model. IEEE Geoscience and Remote Sensing Letters, 2022, 19: 1-5.