Underwater dynamic high-precision magnetic force measurement method and device

A magnetic measurement, high-precision technology, applied in the field of exploration equipment, can solve the problem that the three axes of the magnetometer cannot be orthogonal

Active Publication Date: 2018-11-06
GUANGZHOU MARINE GEOLOGICAL SURVEY
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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

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  • Underwater dynamic high-precision magnetic force measurement method and device
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[0046] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0047] Such as figure 1As shown, an underwater dynamic high-precision magnetic device includes a large-diameter cylinder, a small-diameter cylinder and a controller (not shown in the figure), the diameter of the large-diameter cylinder is 347mm, and the diameter of the small-diameter cylinder is 99mm. The length of the small-diameter cylinder is greater than the length of the large-diameter cylinder, the length of the large-diameter cylinder is 530mm, and belongs to the structural shape of a short cylinder, and the length of the small-diameter cylinder is 1616mm, which belongs to the structural shape of a long cylinder; the large-diameter cylinder includes the first An upper cover 3083, a first cylinder 3084 and a lower cover 3085, the first cylinder 3084 is a hollow cylindrical structure, the first cylinder 3084 is provided with an attitude indicator, ...

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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 ...

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Application Information

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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 陈洁车振王劲松佘以军曹平军杨昌茂廖开训
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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