A method and system for correcting magnetometer measurement errors

Abstract

The invention discloses a magnetometer measurement error correction method and system. The magnetometer measurement error correction method includes the following steps: acquiring magnetometer measurement error correction parameters and magnetometer measurement values; and performing probe temperature drift correction; Perform circuit temperature drift correction; perform magnetometer zero offset correction; and perform probe orthogonality error correction. The magnetometer measurement error correction method provided by the invention can effectively correct the temperature drift error of the magnetometer probe, the temperature drift error of the magnetometer circuit, the zero point drift error of the magnetometer and the three-axis orthogonality error of the magnetometer, and improve Magnetometer measurement accuracy.

Description

technical field [0001] The invention relates to a method for correcting a magnetometer measurement error and a system for correcting a magnetometer measurement error using the method. Background technique [0002] A magnetometer is an instrument used to measure the magnetic field. Common magnetometers have a variety of implementation systems. At present, the most widely used magnetometer system on satellites is the fluxgate magnetometer. The accuracy, power consumption, and volume of the fluxgate magnetometer make it very suitable for use on general satellites. Designing a high-performance spaceborne magnetometer still faces many challenges, including overcoming the influence of the three-axis orthogonality of the magnetometer probe, overcoming the influence of probe temperature changes, and overcoming the influence of circuit system noise. The three-axis direction of the magnetometer probe is not perfectly orthogonal to each other, which causes errors in the measurement di...

AI Technical Summary

Problems solved by technology

Designing a high-performance spaceborne magnetometer still faces many challenges, including overcoming the influence of the three-axis orthogonality of the magnetometer probe, overcoming the influence of probe temperature changes, and overcoming the influence of circuit system noise, etc.

The three-axis direction of the magnetometer probe is not perfectly orthogonal to each other, which causes errors in the measurement direction. Usually, a special hardware correction device is installed on the probe to correct the three-axis orthogonality. This correction method has poor seismic performance. Poor, and increases the size and weight of the probe

The temperature of the probe has a great influence on the output results. Usually, the output of the magnetometer changes by about 1 / 10,000 when the temperature changes by one degree Celsius. With the continuous improvement of satellite integration, the satellite's internal electronic system has more and more influence on the probe

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