Vector magnetometer on-orbit real-time calibration system and method

Abstract

The invention discloses a vector magnetometer on-orbit real-time calibration system and method. The system comprises a calibration coil, a calibration control circuit, a scalar magnetometer and a vector magnetometer, the calibration control circuit controls the calibration coil to enable the calibration coil to generate a stable magnetic field, the scalar magnetometer is used for detecting the size of the generated magnetic field, and the calibration coil is located on a satellite platform; the scalar magnetometer and the vector magnetometer are located on a satellite extension rod, in the calibration mode, the calibration control circuit is combined with the calibration coil to generate a magnetic filed to counteract a background magnetic field until data measured by the scalar magnetometer is zero, a new base value and a scaling factor of the vector magnetometer are calculated, and finally the calibration control circuit is shut down; the vector magnetometer is switched back to a normal sampling processing mode, and magnetic field data is calculated by using a new scale factor and a base value. According to the system and the method, the on-orbit calibration can be automatically completed, the calibration processing speed is high, the calibration result is accurate, manual intervention is not needed in the calibration process, and the system and method are suitable for on-orbit real-time calibration of the satellite-borne vector magnetometer working for a long service life.

Description

technical field [0001] The invention relates to the field of vector magnetometer calibration, in particular to an on-orbit real-time calibration system and method for a vector magnetometer. Background technique [0002] The vector magnetometer is the most commonly used magnetic field measurement device in planetary magnetic field detection because it can measure the three-component vector of the magnetic field. The most commonly used vector magnetometer is the fluxgate magnetometer, which has the advantages of small size, high reliability, and high measurement accuracy. However, when operating in orbit for a long time, due to the aging of materials and devices, the scale factor and base value of the fluxgate magnetometer will deviate to a certain extent. When the deviation is large, the measured data will not be correct. correction and processing. [0003] Generally, the on-orbit calibration needs to be realized by the rotation of the satellite platform, but for some satel...

AI Technical Summary

Problems solved by technology

However, when operating in orbit for a long time, due to the aging of materials and devices, the scale factor and base value of the fluxgate magnetometer will deviate to a certain extent. When the deviation is large, the measured data will not be correct. Correction and Processing

[0003] Generally, the on-orbit calibration needs to be realized by the rotation of the satellite platform, but for some satellite platforms with constant direction or patrol devices working on the surface of the planet, it is difficult to use the rotation of the satellite platform for calibration, and this rotation Although the method is simple to operate, the accuracy of correction is not high

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