Magnetic target location method based on magnetic sensor array coordinate system

Abstract

The present invention discloses a magnetic target location method based on a magnetic sensor array coordinate system. The method comprises the steps of: establishing a magnetic sensor array coordinatesystem according to the position coordinates of each magnetic sensor, and after a magnetic target enters the magnetic sensor array coordinate system, collecting the magnetic field value of each magnetic sensor; according to the magnetic field value of each magnetic sensor, obtaining the magnetic field total amount value of each magnetic sensor, rejecting the magnetic field value and the positioncoordinates of the magnetic sensor with the maximum magnetic field total amount value, and obtaining remaining data; and employing the magnetic field value of each magnetic sensor to establish a target function, substituting the remaining data into the target function, employing a particle swarm optimization and an LM to perform optimization of the target function, and obtaining a location resultof a magnetic target. The method is rapid and effective, and can meet the timeliness and accuracy requirements of magnetic target location.

Description

technical field [0001] The invention belongs to the field of magnetic target positioning, and more particularly relates to a magnetic target positioning method based on a magnetic sensor array coordinate system. Background technique [0002] Real-time monitoring of magnetic targets needs to meet two requirements: real-time and accuracy. The essence of the current positioning method is to use the magnetic dipole model to derive a nonlinear equation system, and then solve the nonlinear equation system. Classical iterative methods are often used to solve this nonlinear equation system, such as Gauss-Newton method, gradient descent method, LM (Levenberg-Marquardt) algorithm, etc. These methods are fast in calculation but need to provide reasonable initial values ​​artificially. If the initial value is selected Unreasonable, the calculation result is very unstable. While the global intelligent optimization algorithm can overcome the initial value sensitivity problem, but the ca...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a magnetic target positioning method based on the magnetic sensor array coordinate system, thereby solving the problems of slow calculation speed, initial value sensitivity, and abnormality in special areas in the existing magnetic target positioning method. Rapid Convergence Technical Issues

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