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Aerial magnetic measurement signal determination method and system

A signal determination and airborne magnetic measurement technology, which is applied in the direction of measuring devices, measuring magnetic variables, instruments, etc., can solve problems such as difficult calculation and difficult to obtain background magnetic field, and achieve the effect of improving accuracy

Pending Publication Date: 2022-04-29
中国人民解放军火箭军工程大学
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Problems solved by technology

However, the eddy current magnetic field is related to the derivative of the magnetic field strength, especially in the presence of random noise, it is difficult to perform accurate calculations
Therefore, when considering the eddy current magnetic field in the anomalous field model, it is difficult to obtain the real background magnetic field

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  • Aerial magnetic measurement signal determination method and system
  • Aerial magnetic measurement signal determination method and system
  • Aerial magnetic measurement signal determination method and system

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] The object of the present invention is to provide a method and system for determining the aeromagnetic measurement signal, which improves the accuracy of the measurement of the strength of the earth's magnetic field and the strength of the eddy current magnetic field.

[0059] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunc...

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Abstract

The invention relates to the technical field of magnetic field signal measurement, in particular to an aviation magnetic measurement signal determination method and system, and the method comprises the steps: obtaining a comprehensive measurement model of a three-axis magnetometer; the three-axis magnetometer is arranged on the aircraft, and the comprehensive measurement model is a comprehensive measurement model of errors and magnetic field interference fields of the three-axis magnetometer; determining the real-time angular acceleration of the aircraft based on the shaping filter and the maximum angular acceleration of the aircraft; taking the real-time angular acceleration as an input quantity, taking a roll angle, a pitch angle, a yaw angle, a roll angular velocity, a pitch angular velocity and a yaw angular velocity of the aircraft as state quantities, and taking the actually measured magnetic field intensity of the three-axis magnetometer as an output quantity to construct a real-time geomagnetic field estimation model of the aircraft; solving the real-time geomagnetic field estimation model by using volume Kalman filtering, and determining a state quantity; and determining the geomagnetic field intensity and the eddy magnetic field intensity according to the state quantity. The measuring accuracy of the geomagnetic field intensity and the eddy current magnetic field intensity is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic field signal measurement, in particular to an aeromagnetic signal determination method and system. Background technique [0002] Magnetometers are widely used in the fields of geomagnetic navigation and guidance and magnetic target detection. Recently, three-axis magnetometers are widely used to measure the magnetic gradient tensor. However, the anomalous field has a great influence on the measurement process and it should be compensated before the magnetic measurement. The calibration of the abnormal magnetic field includes two steps: the construction of the distortion model and the estimation of the real-time background magnetic field. [0003] The construction of geomagnetic anomaly fields is not a new problem. Classical methods are mainly implemented based on scalar compensation. The ellipsoid fitting method has been widely used in magnetic distortion field compensation. These methods en...

Claims

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Application Information

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IPC IPC(8): G01R33/07
CPCG01R33/07
Inventor 李婷张金生马啸宇廖守亿夏朝辉任鹏钰刘冰
Owner 中国人民解放军火箭军工程大学
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