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Method of eliminating influence of carrier magnetizing field on geomagnetic measurement

A magnetizing magnetic field and geomagnetic measurement technology, which is applied in the direction of measuring devices, ground navigation, instruments, etc., can solve problems such as difficult corrections

Active Publication Date: 2013-02-13
三亚哈尔滨工程大学南海创新发展基地
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Problems solved by technology

[0008] As long as the magnetizing field D can be determined, by T 0 =T 测 -D, you can get the geomagnetic field value T 0 , and the magnetized magnetic field changes with the change of the magnitude of the geomagnetic field and the change of the navigation direction when the carrier sails, so it is not easy to correct

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  • Method of eliminating influence of carrier magnetizing field on geomagnetic measurement
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  • Method of eliminating influence of carrier magnetizing field on geomagnetic measurement

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Embodiment Construction

[0029] After compensating the inherent magnetic field and filtering the interference of the AC magnetic field, in order to eliminate the magnetic field D of the carrier, the content and implementation process of the present invention are as follows:

[0030] 1. Randomly select a non-magnetic anomaly point A with a gentle magnetic field change within the space to be measured, and use an independent magnetic sensor to measure the total geomagnetic field T of point A without a carrier 0 .

[0031] 2. The carrier is equipped with dual magnetic sensors to form a line array. Place the carrier equipped with the dual magnetic sensor line array at this point, take the geometric center of the line array as the axis, and make the carrier rotate slowly and uniformly for one circle. The magnetic sensor continuously measures the value of the earth's magnetic field T 1 (θ), T 2 (θ) and the corresponding rotation angle θ.

[0032] 3. The geomagnetic field value T measured by the dual senso...

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Abstract

The invention provides a method of eliminating influence of a carrier magnetizing field on geomagnetic measurement. The method is characterized in that two magnetic sensor linear arrays are carried on a carrier, a non-magnetic anomaly point A with a mild magnetic field change is selected within the scope of a space to be measured, a geomagnetic total field of the point A is measured under the carrier-free condition by utilizing an independent magnetic sensor, the carrier carried with the two magnetic sensor linear arrays is placed on the point A, a geometric center of the linear array is taken as an axis, the carrier is slowly rotated at a constant speed for one circle, a geomagnetic field value and the corresponding rotating angle are respectively continuously measured by the two magnetic sensors, the corresponding function curve of a difference and an angle is made, the geomagnetic total field on the point is subtracted by the magnetic field value of the linear array magnetic sensor, and the actual measurement geomagnetic field in the whole space to be measured is used for compensating the influence of the carrier magnetizing magnetic field. According to the invention, the linear array is formed by the two magnetic sensors, and a demagnetization method and a demagnetization algorithm of the rotating linear array are provided for complicated influence of the carrier on the magnetic measurement, so that the influence of the carrier on geomagnetic measurement is completed eliminated.

Description

technical field [0001] The invention relates to a method for compensating the influence of ferromagnetic carriers on magnetic measurement in geomagnetic measurement and geomagnetic navigation applications. Background technique [0002] The geomagnetic field is the basic physical field of the earth system and the inherent resource of the earth. It has the characteristics of all-day, all-weather, and all-region, and provides a natural coordinate system for navigation. Geomagnetic navigation technology is simple, efficient, reliable, and anti-interference Strong, belongs to passive autonomous navigation, especially in underwater, geomagnetic navigation has broad application prospects. In addition, the geomagnetic field has important application prospects in the fields of geological disaster prediction, energy and mineral deposit survey, important strategic target site selection, and ocean continental shelf monitoring. To realize various geomagnetic applications, it is first ne...

Claims

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Application Information

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IPC IPC(8): G01C21/08G01C25/00
Inventor 康崇张晓峻樊黎明
Owner 三亚哈尔滨工程大学南海创新发展基地
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