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A vector magnetometer on-orbit real-time calibration system and method

A magnetometer and calibration technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of low calibration accuracy, fluxgate magnetometer scale factor and base value offset, and data that cannot be corrected correctly and processing problems, to achieve the effect of accurate calibration results and fast calibration processing speed

Active Publication Date: 2021-11-30
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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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

Method used

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  • A vector magnetometer on-orbit real-time calibration system and method
  • A vector magnetometer on-orbit real-time calibration system and method
  • A vector magnetometer on-orbit real-time calibration system and method

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Embodiment 1

[0077] Embodiment 1: The present invention discloses a vector magnetometer on-orbit real-time calibration system, which combines figure 1 As shown, the system includes a calibration coil 100 , a calibration control circuit 200 , a scalar magnetometer 300 and a vector magnetometer 400 to be calibrated. The calibration control circuit 200 is used to generate current, control the calibration coil 100 to generate a standard magnetic field, and is responsible for processing and completing the calculation of calibration parameters. 300 is used to confirm the parameters of the calibration control circuit when the magnetic field generated by the calibration coil 100 cancels the background magnetic field, so as to eliminate the influence of the background magnetic field.

[0078] The calibration coil 100 is a field-adding coil, composed of multiple sets of coils, installed on a satellite platform or a patrol platform, and the requirement for the installation position is that the magnet...

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Abstract

The invention discloses an on-orbit real-time calibration system and method for a vector magnetometer. The system includes a calibration coil, a calibration control circuit, a scalar magnetometer and a vector magnetometer. The calibration control circuit controls the calibration coil to make it A stable magnetic field is generated, and the scalar magnetometer is used to detect the magnitude of the generated magnetic field. The calibration coil is located on the satellite platform, and the scalar magnetometer and vector magnetometer are located on the satellite boom. In the calibration mode, the calibration control circuit The joint calibration coil first generates the background magnetic field to offset the data measured by the scalar magnetometer to zero, then calculates the new base value and scaling factor of the vector magnetometer, and finally the calibration control circuit is shut down, and the vector magnetometer switches back to normal Sampling processing mode, using the new scale factor and base value to calculate the magnetic field data, the invention can automatically complete the on-orbit calibration, and the calibration processing speed is fast, the calibration result is accurate, the calibration process does not require manual intervention, and is suitable for long-life work On-orbit real-time calibration of spaceborne vector magnetometer.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 孙树全杜爱民赵琳张莹李智冯晓
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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