Geomagnetic measurement method based on split type suspended spherical coil

Abstract

The invention discloses a geomagnetic measurement method based on a split type suspended spherical coil. The method comprises the steps that a measurement system is installed; under the situation thatpower is not supplied to a compensating spherical coil, a tester host measures a geomagnetic total field through the compensating spherical coil; under the situation that power is supplied to the compensating spherical coil, a measured value is recorded as the geomagnetic horizontal component when reaching the minimum; the tester host supplies power to a bias spherical coil, the bias spherical coil applies a bias magnetic field in the east-west direction, and a resultant magnetic field of the bias magnetic field and geomagnetic total field is calculated to obtain a relative magnetic declination; other geomagnetic parameters are calculated by using the geomagnetic total field, the geomagnetic horizontal component and the relative magnetic declination. The structure of the split type suspended spherical coil adopted by the geomagnetic measurement method is very simple, a magnetic field generated inside the coil is more uniform, a magnetic field outside the coil attenuates more quickly,the external radiation is small, and the sampling frequency can be effectively improved.

Description

technical field [0001] The invention relates to a geomagnetic measurement method, in particular to a geomagnetic measurement method based on a split suspended spherical coil. Background technique [0002] At present, the suspended spherical coil is composed of two mutually orthogonal spherical coils, which can be combined with a proton magnetometer to observe the absolute value F of the total field of the earth's magnetic field, the relative value of the horizontal component H and the declination D. But there are the following disadvantages: (1) Since the two spherical coils are assembled into one body and need to be orthogonal to each other, the assembly and disassembly are more complicated, and the installation, debugging, disassembly and maintenance are difficult. Once a failure occurs, it usually needs to be completed by the technical personnel of the manufacturer. , which increases the cost of operation and maintenance; (2) two spherical coils are assembled into one bod...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention: the assembly and disassembly of the existing suspended spherical coil geomagnetic measurement method are more complicated, the difficulty of installation, debugging, disassembly and maintenance is high, there is mutual inductance inside the coil, the magnetic field uniformity is low, and the external radiation has a great influence , the sampling rate is low and the magnetic declination measurement must rely on the compensation magnetic field, the bias magnetic field and the calculation of the total field synthesis, the method is cumbersome

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