Underwater dynamic high-precision magnetic force measurement method and device

Abstract

The present invention relates to an underwater dynamic high-precision magnetic force measurement method and device. The method comprises the following steps of: the step A: calibrating three axes of amagnetometer itself to maintain orthogonality among the three axes of the magnetometer, comprising the following sub steps: the step A1: obtaining a value of an external fixed interference magnetic force Hh except a carrier, the step A2: employing the least square method to obtain [Xi], the step A3: solving a symmetric matrix A, the step A4: obtaining K and He, and the step A5: calculating the Hm; the step B: comprising the following steps executed in order: the step B1, coinciding the rotation of the X axis of an attitude indicator with the X axis of the magnetometer, the step B2: coincidingthe rotation of the Y axis of the attitude indicator with the Y axis of the magnetometer, and the step B3: coinciding the rotation of the Z axis of the attitude indicator with the Z axis of the magnetometer. The underwater dynamic high-precision magnetic force measurement method and device makes the orthogonality of the magnetic axes of the magnetometer itself, maintains consistency of magnetic axes and the axes corresponding to the attitude indicator, and can obtain high-precision magnetic measurement data in a dynamic condition.

Description

technical field [0001] The invention relates to the technical field of exploration equipment, in particular to an underwater dynamic high-precision magnetic force measurement method and device. Background technique [0002] The accuracy of seabed magnetic measurement is proportional to the distance. The closer the distance to the seabed, the higher the accuracy of the measured magnetic force, and the farther the distance, the lower the accuracy. However, traditional marine magnetic surveys use ship-borne methods. Obtaining high-resolution magnetic information cannot meet the accuracy and resolution requirements for deep-sea oil and gas and mineral resource exploration. In the deep water environment, the magnetometer uses the carrier to detect the marine magnetism. For example, by installing the magnetometer on the detection towing body, the detection towing body will be affected by the mother ship’s towing and ocean currents during the towing process of the detection towing ...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide an underwater dynamic high-precision magnetic force measurement method, which can solve the problem that the three axes of the magnetometer cannot be orthogonal

[0005] The second object of the present invention is to provide a magnetic device, which can solve the problem that the three axes of the magnetometer cannot be orthogonal

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