Onshore correction method of magnetic interference of magnetometer installed in submarine vehicle
A calibration method and magnetometer technology are applied in the field of magnetic exploration to achieve the effects of good calibration effect, good calibration effect and good calibration effect
Active Publication Date: 2016-03-09
SECOND INST OF OCEANOGRAPHY MNR
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Problems solved by technology
[0004] Aiming at the deficiencies in the existing technology, a magnetic interference correction method for the submersible magnetometer is proposed to solve the problem of whether the magnetic interference of the magnetometer installed in the submersible can be effectively corrected before the submersible is launched into the sea, whether the magnetic measurement data is reliable, and whether the submersible Whether the magnetometer is suitable for magnetic survey near the seabed
Method used
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Embodiment 1
[0052] A land-based correction method for magnetic interference of a magnetometer installed in a submersible, through the following steps:
[0053] S1. Lay out survey lines and survey points in the survey area, where the slope in the survey area is less than 10°;
[0054] S2. T of the survey area with high-precision magnetometer geo , requires measuring area T geo Gradient less than 2nT / m, T geo is the value of the geomagnetic field;
[0055] S3. The high-precision magnetometer probe is placed in the center of the measurement area to measure the magnetic field value T of the magnetic source at each measurement point of the comparison measurement line base ,T base is the reference geomagnetic field value of the survey area;
[0056] S4. Rotate the submersible for one week, measure the magnetic field value of each orientation of the submersible when there is no magnetic source, and the fitting function formula of the induced magnetic field of the submersible changes with th...
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Abstract
The present invention relates to an onshore correction method of the magnetic interference of a magnetometer installed in a submarine vehicle. According to the method, through the equivalent replacement of a magnetic interference source in a submarine vehicle by a magnetic source, the problems of difficult corresponding correction working in a magnetic measurement center caused by heavy weight and large volume of the submarine vehicle are solved. At the same time, the magnetic field condition of the submarine vehicle in four directions is measured in the condition of no magnetic source, the data processing and comparison are carried out, and final correction data is obtained. The method has the advantages of high simplicity and practicability, low cost, and a good corrective effect.
Description
technical field [0001] The invention relates to the technical field of magnetic prospecting, in particular to a land-based correction method for magnetic interference of a magnetometer installed in a submersible. Background technique [0002] Because minerals are usually magnetic, mining areas often show geomagnetic anomalies under the action of the earth's magnetic field. Land magnetic prospecting is a widely used geophysical prospecting method, such as aeromagnetic survey and ground magnetic survey. Due to the depletion of land mineral resources, there are abundant mineral resources in the ocean, especially the mineral resources in the international sea area have become the focus of attention of all countries in the world. my country also attaches great importance to this, and has successfully applied for a polymetallic nodule mining area of 75,000 square kilometers in the Pacific Ocean. , a 3,000-square-kilometer cobalt-rich crust mining area, and a 10,000-square-kilomet...
Claims
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Login to View More IPC IPC(8): G01V13/00
CPCG01V13/00
Inventor 张金辉吴涛陶春辉吴招才周建平张国堙邓显明
Owner SECOND INST OF OCEANOGRAPHY MNR