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Digital fluxgate magnetometer and geomagnetism measurement system

A magnetometer and fluxgate technology, applied in the field of magnetometers and fluxgate magnetometers, to achieve the effects of improving measurement accuracy, improving reliability, and facilitating correction and calibration

Inactive Publication Date: 2015-06-10
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Designing a high-performance spaceborne magnetometer faces many challenges, including the need to overcome the influence of three-axis orthogonality, the influence of probe temperature drift and the influence of circuit system temperature drift

Method used

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  • Digital fluxgate magnetometer and geomagnetism measurement system
  • Digital fluxgate magnetometer and geomagnetism measurement system
  • Digital fluxgate magnetometer and geomagnetism measurement system

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Embodiment Construction

[0019] The digital fluxgate magnetometer and geomagnetic measurement system provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] See figure 1 , the first embodiment of the present invention provides a digital fluxgate magnetometer 100, including a probe 10, an analog circuit module 20 and a digital circuit module 30; the analog circuit module 20 excites the signal line D81 through the probe, the probe output and feedback The signal line D82 is connected to the probe 10, and the digital circuit module 30 is connected to the analog circuit module 20 through an analog circuit output line D7. The probe 10 includes a probe X-axis 11, a probe Y-axis 12, a probe Z-axis 13 and a temperature sensor 14. The probe X-axis 11, the probe Y-axis 12 and the probe Z-axis 13 respectively sense the ambient magnetic field according to the fluxgate principle. X-axis, Y-axis, and Z-axis componen...

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Abstract

The invention relates to a digital fluxgate magnetometer. The digital fluxgate magnetometer comprises a probe, an analog circuit module and a digital circuit module; the probe comprises an axis X, an axis Y and an axis Z which are respectively used for sensing component of an environmental magnetic field in the axis X, the axis Y and the axis Z as well as outputting the sensed magnetic field component signals to the analog circuit module; the analog circuit module is used for processing the magnetic component signals outputted by the probe to obtain three-axis analog signals in direct proportion to the magnetic field strength of the axis X, the axis Y and the axis Z; the digital circuit module is used for converting the three-axis analog signals, a reference voltage signal and a probe temperature signal into digital signals to be outputted to the outside, and therefore, a user can conveniently correct and check the measurement value of the magnetometer so as to improve the measurement precision and the system stability.

Description

technical field [0001] The invention relates to a magnetometer, in particular to a fluxgate magnetometer, which belongs to the technical field of geomagnetic field measurement. Background technique [0002] Magnetic field is the basic property of celestial bodies in the universe. The geomagnetic field is the magnetic field of the earth. The strength of the geomagnetic field at any point around the earth is a vector with a certain size and direction, and it is generally believed that the strength of the magnetic field at any point around the earth is different. From the perspective of the mathematical model, the Earth's magnetic field satisfies the Laplace equation. Therefore, as long as the Earth's magnetic field is observed at several locations, and then solved using the Laplace equation, the Earth's surface, especially any space within 1000km from the Earth, can be obtained. A little magnetic field. The IGRF (International Geomagnetic Reference Field) model maintained by...

Claims

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Application Information

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IPC IPC(8): G01R33/04G01V3/40
Inventor 陈曦王嘉博高文云
Owner TSINGHUA UNIV