Linear localization method based on two-point magnetic gradient full tensor
A linear positioning and full tensor technology, applied in the field of magnetic detection, can solve problems such as complex solution process, large influence of geomagnetism, inability to obtain analytical optimal solution, etc., achieve the effect of simple solution process and reduce positioning error
Active Publication Date: 2021-11-02
NAVAL UNIV OF ENG PLA
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Problems solved by technology
The single-point magnetic gradient full tensor magnetic target positioning method realized by a single observation point has the problem of being greatly affected by geomagnetism
In the prior art, there are also some methods that use two or more observation points to achieve positioning. Although the existing two-point or multi-point positioning methods reduce the influence of the geomagnetic field, they basically face the problem of solving nonlinear equations. problem, the solution process is complicated, and the analytical optimal solution cannot be obtained
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[0061] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following will further explain how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.
[0062] The present invention provides a linear positioning method based on two-point magnetic gradient full tensor, comprising the following steps:
[0063] S1, such as figure 1 As shown in , a space Cartesian coordinate system is established with any point in the space as the origin, the coordinates of the first observation point and the second observation point are determined, and the positioning formula of the target point to be positioned is obtained:
[0064]
[0065] in,
[0066] In the formula, Indicates the position vector from the coordinate origin to the target point, Indicates the position vector from the coordinate origin to the first observation point, Indicate...
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The invention discloses a linear positioning method based on two-point magnetic gradient full tensor, which includes the following steps: S1, establishing a space rectangular coordinate system with any point in space as the origin, and determining the coordinates of the first observation point and the second observation point , to obtain the positioning formula of the target point to be observed; S2, to measure the magnetic gradient full tensor of the two observation points respectively; S3, to substitute the data measured in step S2 into step S1, and calculate the positioning data of the target point to be positioned. The linear positioning method based on the two-point magnetic gradient full tensor provided by the present invention can realize the positioning of the target point according to the two-point magnetic gradient full tensor and the relative position of the two points, and does not need to measure the geomagnetic field value during the period, which reduces the The positioning error caused by the noise of the geomagnetic field, and the linear method is used to complete the solution. The solution process is simple and the analytical solution can be obtained directly.
Description
technical field [0001] The invention relates to the field of magnetic detection, in particular to a linear positioning method based on two-point magnetic gradient full tensor. Background technique [0002] Magnetic detection is an important technical means to study information related to magnetic targets, especially in identifying and locating deep-sea or underground magnetic buried objects, magnetic anomaly detection technology has better initiative and concealment. The single-point magnetic gradient full-tensor magnetic target positioning method realized by a single observation point has the problem of being greatly affected by geomagnetism. In the prior art, there are also some methods that use two or more observation points to achieve positioning. Although the existing two-point or multi-point positioning methods reduce the influence of the geomagnetic field, they basically face the problem of solving nonlinear equations. The problem of , the solution process is complic...
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IPC IPC(8): G01V3/38G01V3/08
Inventor 张宁徐磊赵鹤达
Owner NAVAL UNIV OF ENG PLA