Spherical feedback tricomponent fluxgate magnetic full-tenser gradiometer

Abstract

The invention relates to a spherical feedback tricomponent fluxgate magnetic full-tenser gradiometer. Three mutually perpendicular crossed enameled wire winding slots are carved on the surface of a spherical non-conductive material, and more than three tricomponent fluxgate sensors are mounted in the sphere and connected with a triaxial spherical feedback coil to form a closed loop through a control circuit so as to further form the tricomponent fluxgate magnetic full-tenser gradiometer. Compared with the prior art, the uniform field generated by the spherical coil is larger than that generated by other feedback coils; under the same uniformity, the spherical feedback coil occupies the minimum volume; the plurality of fluxgate sensors are placed in one triaxial spherical coil, the fluxgate is in a stable working state in the environment close to zero magnetism, so that mutual interference of the feedback coils during feedback of each fluxgate is avoided, the calibration is facilitated, the baseline distance is greatly shortened, and the system precision is improved. The spherical feedback tricomponent fluxgate magnetic full-tenser gradiometer is particularly suitable for being used in aeronautical, aerospace and other space-limited environments and has a wider application range.

Description

Technical field: [0001] The invention relates to a geophysical exploration device, in particular to a spherical feedback three-component fluxgate magnetic gradient full tensor probe. Background technique: [0002] The magnetic gradient tensor probe is a sensor that measures the rate of change of the magnetic field in space along the three directions of xyz in the rectangular coordinate system. Since this type of sensor needs to be sensitive to the direction of the magnetic field, there are currently two main ways to realize the tensor probe. One is a combination of superconducting quantum interference devices, such as the German LTS-SQUID aviation full-tensor magnetic gradient tensor [ R.Stolz et al, Magnetic full-tensor SQUID gradiometer system for geophysical applications, The Leading Edge, 2006, 25(2):178-180.], Australian GETMAG magnetic gradient tensor [P.Schmidt et al, GETMAG-a SQUID magnetic tensor gradientometer for mineral and oil exploration, Exploration Geophysic...

AI Technical Summary

Problems solved by technology

The problem with this method is that the feedback coil acting on one fluxgate will interfere with other fluxgates

In the actual implementation process, due to the influence of inevitable installation errors, these interfering magnetic fields cannot cancel each other out, resulting in large system errors, which will be converted into random errors in motion, which is difficult to eliminate

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