Geomagnetic daily variation error correction method for coil type vector magnetometer
An error correction and magnetometer technology, applied in the field of coil-type vector magnetometer geomagnetic diurnal variation error correction, can solve the problems that the magnetometer cannot measure diurnal variation interference suppression, and achieve the effect of improving detection accuracy
Active Publication Date: 2021-11-05
CHINA UNIV OF GEOSCIENCES (WUHAN)
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[0004] At present, the commonly used daily variation interference suppression method is to establish a daily variation observation station, use a high-precision magnetometer to measure at the same time, and then make a difference between the two. The difference obtained is the daily variable. After the daily variation is obtained, the correlation is eliminated work, but this method cannot suppress the daily variation interference in the measurement process of the magnetometer, and there are few researches on the analysis and suppression method of the daily variation error in the detection process of the coil magnetometer
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[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0036] The measuring principle of the coil magnetometer is as follows: figure 1 As shown, in each measurement cycle, the earth’s magnetic field is considered to be constant, and then the bias field A with equal magnitude and opposite direction is applied respectively + and A - After that, measure the magnetic field F after the bias field and the earth's magnetic field are superimposed 3+ and F 3- , when no bias field is applied, the total geomagnetic field F is measured 3 , and then θ can be calculated by the following solution method. figure 1 F in 0 is the amount of the geomagnetic field when the instrument starts measuring.
[0037] in F 3+ 、A + , F 3 and F 3- 、A - , F 3 , in the two triangles formed, for...
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The invention provides a geomagnetic daily variation error correction method for a coil type vector magnetometer, which is used for solving the problem that the detection precision of the instrument is influenced by daily variation interference in a measurement period of the coil type vector magnetometer. The method comprises the steps of firstly, erecting the coil type magnetometer and a three-component magnetometer, then recording a superimposed field after bias fields with the same size and opposite directions are applied and a geomagnetic field F3 when the bias fields are not applied; and calibrating all superimposed fields to the moment of measuring F3 by using a vector transformation relation, recording as superimposed fields F3+' and F3-', and then carrying out geomagnetic parameter resolving. The method has the beneficial effects that the daily variation effect error correction of the coil type vector magnetometer can be realized by using a geomagnetic component and the data of the superimposed field after the specific bias field is applied, and other parameters are not needed; the geomagnetic daily variation effect in the measurement period of the coil type magnetometer is inhibited, and the detection precision of the instrument is improved; and the geomagnetic daily variation error suppression method is based on the operation process of the coil type magnetometer, and extra operation steps are not needed.
Description
technical field [0001] The invention relates to the field of magnetic field measurement, in particular to a method for correcting geomagnetic diurnal variation errors of a coil-type vector magnetometer. Background technique [0002] The geomagnetic field is a vector field, which defines seven geomagnetic elements: the total geomagnetic field F, the horizontal component H, the north component X, the east component Y, the vertical component Z, the magnetic inclination I, and the magnetic declination D to describe the geomagnetic field, where the horizontal component and The plane formed by the vertical components is the magnetic meridian. The detection of geomagnetic elements has important applications in the fields of geological disaster prediction, earth science and space science. Therefore, high-precision geomagnetic element data is of great significance to resource exploration, natural disaster prediction and global geomagnetic field model building. [0003] The measurem...
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Login to View More IPC IPC(8): G01V3/40G01V3/38
CPCG01V3/40G01V3/38
Inventor 葛健李鹏辉董浩斌郑千玮王锐钱君立
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)