Magnetic Field Azimuth Measurement Method

Abstract

The invention provides a magnetic field direction measuring method which is used for calibrating an included angle relationship between a measured magnetic field direction and an earth coordinate system, and can realize calibration of an euler angle between a magnetic sensor and other sensors, a standard magnetic source magnetic field direction and the like. A set of standard positions of a magnetic measuring axis coordinate system and an earth coordinate system (or a celestial body coordinate system) is established, and a physical quantity tester for a vector magnetic sensor and an associatedearth coordinate system (or the celestial body coordinate system) is used for measuring associated physical quantity to construct a relationship with the earth coordinate system (or the celestial body coordinate system), and an included angle relationship between a measuring axis of the magnetic sensor and a measuring axis of a gyro theodolite or a star sensor and the like is measured by virtue of the relationship between earth magnetic fields and the earth coordinate system (or the celestial body coordinate system), so that the relationship between the coordinate system of the magnetic sensor and a coordinate axis euler angle of apparatuses such as the gyro theodolite or the star sensor is calibrated, and a relative relationship between a standard magnetic source coil magnetic axis and the earth coordinate system (or the celestial body coordinate system) is measured.

Description

technical field [0001] The invention relates to the field of magnetic field measurement, which is used for calibrating the angle relationship between the measurable magnetic field direction and the earth coordinate system, and in particular is a magnetic field orientation measurement method. Background technique [0002] At present, the precision of the vector magnetic field is an effective means and way for human beings to explore the world. Among them, the magnetic field modulus test tools are abundant and have high precision. Typical magnetometers include: fluxgate sensors, atomic magnetometers, proton magnetometers, superconducting Quantum interferometer, etc., the highest accuracy can reach Pete level; but the magnetic field vector direction test is difficult to ensure. The magnetic source coil is made of a skeleton as a constraint and is wound by a multi-strand coil. The processing and winding process of the skeleton and coil will introduce deviations. Therefore, the g...

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Problems solved by technology

[0002] At present, the precision of the vector magnetic field is an effective means and way for human beings to explore the world. Among them, the magnetic field modulus test tools are abundant and have high precision. Typical magnetometers include: fluxgate sensors, atomic magnetometers, proton magnetometers, superconducting Quantum interferometer, etc., the highest accuracy can reach Pete level; but the magnetic field vector direction test is difficult to ensure. The magnetic source coil is made of a skeleton as a constraint and is wound by a multi-strand coil. The processing and winding process of the skeleton and coil will introduce deviations. Therefore, the geometric axis of the coil will deviate from the axis of the magnetic field generated by the coil. This deviation There is no accurate way to measure

[0003] It is impossible to calibrate the magnetic axis direction of the standard magnetic source coil, and it is also impossible to calibrate the spatial coordinate axis relationship between the vector magnetic sensor and other types of sensors; a typical problem is the joint calibration of the fluxgate sensor and the star sensor used in geomagnetic exploration satellites; In modern geomagnetic observation satellites, fluxgate sensors are mainly used to obtain high-precision geomagnetic field vector data. Magnetic satellites require that the error of each component of the magnetic field data be at the nT level; requirements; the magnitude of the geomagnetic field strength varies within the range of ±50000nT, if there is a 2" error in the space azimuth angle of the fluxgate, the error in a certain component of the measured magnetic field data will reach 0.49nT; in order to meet the index requirements, It is necessary to strictly control the positioning accuracy of the fluxgate space azimuth angle, and the star sensor is needed to determine the space attitude of the fluxgate, and only the Euler angles between the fluxgate sensor and the star sensor are known to be eliminated, and the Euler angle is eliminated or compensated. Pull angle error, in order to accurately obtain the attitude of the fluxgate

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