Unlock instant, AI-driven research and patent intelligence for your innovation.

A magnetic target detection method

A detection method and magnetic target technology, applied in the field of magnetic detection, can solve the problems of limited detection accuracy, limited detection accuracy improvement, and inability to use, and achieve the effect of improving magnetic detection accuracy

Active Publication Date: 2022-02-15
HARBIN INST OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to propose a magnetic target detection method to solve the problem that SSM only compensates the direction error of the STAR method, and cannot be used in actual magnetic detection; LSM compensates both direction error and distance error, but improves the detection accuracy Very limited; WSM only compensates the direction error of the STAR method, which limits the further improvement of detection accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A magnetic target detection method
  • A magnetic target detection method
  • A magnetic target detection method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0099] Let the magnetic target be on a circular trajectory T parallel to the x-y plane 1 exercise, such as figure 2 shown. on track T 1 Among them, height h=0.25m, radius R=0.433m. The magnitude of the geomagnetic field is 55000nT, the geomagnetic declination is -10°, and the geomagnetic inclination is 60°. Detection distance r, magnetic moment vector The values ​​of baseline distance D, sensor resolution S, and standard deviation σ of Gaussian white noise are shown in Table 1. In this working condition, the calibration error of the tensor gradiometer is not considered first.

[0100]

[0101] Table 1 Simulation conditions

[0102] Because the magnetic moment vector is calculated from the position vector, the detection error is measured by the positioning error δ.

[0103]

[0104] where x t 、y t ,z t are the real values ​​of the coordinates of the magnetic target in the x, y, and z directions, and x c 、y c ,z c are the calculated values ​​of the coordinat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention proposes a magnetic target detection method, the detection method comprising the following steps: step 1, first use the STAR method to calculate the initial value of the position vector and magnetic moment vector; step 2, then calculate the new position vector and magnetic moment vector; Step 3: Repeat step 2 until the difference between the two position vectors meets the convergence condition or the number of iterations reaches the limit. The present invention reveals the mechanism of direction error and distance error, and proposes a kind of NSM that uses iteration method to compensate direction error and distance error at the same time; NSM reduces the average positioning error of STAR method, LSM and WSM respectively 95.1%, 46.0%, and 43.3% smaller, further improving the magnetic detection accuracy of the three magnetic detection methods.

Description

technical field [0001] The invention relates to a magnetic target detection method and belongs to the technical field of magnetic detection. Background technique [0002] Magnetic detection can detect non-cooperative magnetic targets in real time, and is a research hotspot in many fields. In the field of military engineering, it can be used to detect underwater submarines, unexploded ordnance (UXO), magnetic obstacles, etc. In the field of medical research, it can be used for wireless capsule tracking, detection of targeted cancer cells, tongue tracking, etc. In the field of geophysics, it can be used for mineral exploration, cave mapping, geomagnetic field evolution, etc. [0003] Magnetic detection method is the core research content of magnetic detection, and the improvement of magnetic detection method is an important means to improve the accuracy of magnetic detection. The geomagnetic field is an inherent property of the earth, and the magnetic detection method that ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/08G01R33/022G01B7/14G01B7/30
CPCG01V3/081G01R33/022G01B7/14G01B7/30
Inventor 潘东华林生鑫金银锡葛宇航李立毅
Owner HARBIN INST OF TECH