A Novel Method of Localization for Moving Objects with an Alternating Magnetic Field

Area of Science:

• Geophysics
• Biomedical Engineering
• Robotics

Background:

• Magnetic detection is vital for exploration, medicine, and defense.
• Locating moving targets with alternating magnetic fields is challenging and understudied.
• Existing methods primarily focus on static magnetic field localization.

Purpose of the Study:

• To develop a novel method for localizing moving targets using alternating magnetic fields.
• To bridge the gap between static and alternating magnetic field localization techniques.
• To enable precise target tracking with a single magnetic sensor.

Main Methods:

• A novel coherent demodulation technique was proposed.
• The alternating magnetic field localization problem was converted to a static one.
• The Levenberg-Marquardt (L-M) algorithm was employed for position calculation.
• Data was acquired using a single three-component magnetic sensor.

Main Results:

• The proposed coherent demodulation method effectively transforms alternating field localization into a static field problem.
• The Levenberg-Marquardt algorithm accurately calculated target positions.
• Both theoretical simulations and experimental results validated the method's effectiveness.

Conclusions:

• The novel coherent demodulation method offers an effective solution for localizing moving targets with alternating magnetic fields.
• This technique simplifies localization by converting it to a static field problem.
• The study demonstrates the potential for precise tracking using a single magnetic sensor.