Measuring error correction method and system for magnetometer

A technology of measurement error and magnetometer, which is applied in the direction of measuring device, measuring electrical variables, and the size/direction of magnetic field, etc., which can solve problems such as measurement direction error, poor seismic characteristics, and large probe influence

Inactive Publication Date: 2015-06-03
TSINGHUA UNIV
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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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  • Measuring error correction method and system for magnetometer
  • Measuring error correction method and system for magnetometer
  • Measuring error correction method and system for magnetometer

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Embodiment Construction

[0052] The method for correcting the measurement error of the magnetometer provided by the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] See figure 1 , an embodiment of the present invention provides a method for correcting a magnetometer measurement error, comprising the following steps:

[0054] S1, obtain the magnetometer measurement error correction parameter and the magnetometer measurement value; the magnetometer measurement error correction parameter includes: the zero point offset of the three axes of the magnetometer probe, the relative magnetic field of the measured magnetic field in the respective directions of the three axes of the probe The coefficient of the output value of the magnetometer, the actual three-axis angle of the probe, the temperature measurement value of the probe, the temperature drift function of the three-axis probe and the nominal value of the reference voltage; the m...

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Abstract

The invention discloses a measuring error correction method and system for a magnetometer. The measuring error correction method for the magnetometer comprises the following steps: obtaining the measuring error correction parameter of the magnetometer and a magnetometer measuring value; correcting the temperature drift of a probe; correcting the temperature drift of a circuit; correcting the zero drift of the magnetometer; correcting the orthogonal degree error of the probe. The magnetometer probe temperature drift error, the magnetometer circuit temperature drift error, the magnetometer zero drift error and the magnetometer triaxial orthogonal degree error can be effectively corrected by adopting the measuring error correction method for the magnetometer, and the measuring precision of the magnetometer is improved.

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...

Claims

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Application Information

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IPC IPC(8): G01R35/00G01R33/02
Inventor陈曦王嘉博王梦璐
OwnerTSINGHUA UNIV