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A Three-Dimensional Inversion Method for Small-Scale Magnetic Objects Based on Normalized Magnetic Source Strength.

Ziming Cai1, Zhining Li1, Hongbo Fan1

  • 1Department of Vehicle and Electrical Engineering, Shijiazhuang Branch, Army Engineering University of PLA, Shijiazhuang 050003, China.

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|November 11, 2022
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Summary
This summary is machine-generated.

This study introduces a 3D magnetic inversion method for small targets. It improves accuracy by using normalized magnetic source strength, reducing remanence and interference effects.

Keywords:
magnetic targetnormalized magnetic source strengthshape inversionsmall scale target

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Area of Science:

  • Geophysics
  • Geophysical exploration

Background:

  • Accurate 3D inversion of small-scale magnetic objects is crucial for exploration.
  • Remanence and non-target field sources often complicate magnetic inversion.

Purpose of the Study:

  • To propose a novel 3D inversion method for small-scale magnetic objects.
  • To enhance inversion accuracy and reduce interference from external factors.

Main Methods:

  • Utilizing normalized magnetic source strength for inversion, minimizing magnetization direction sensitivity.
  • Improving the planted inversion method with normalized magnetic source strength for prior information.
  • Incorporating a weighting function to boost inversion precision.

Main Results:

  • The method effectively mitigates the influence of magnetic object remanence.
  • Demonstrated reduction in interference from non-target field sources.
  • Achieved higher accuracy in 3D inversion results compared to conventional methods.

Conclusions:

  • The proposed 3D inversion method provides accurate results for small magnetic objects.
  • The technique is robust against remanence and external field interferences.
  • Offers a reliable approach for geophysical exploration of small magnetic targets.