Magnetic moving object detection method

Abstract

The invention discloses a magnetic moving object detection method. For the problem that a magnetic anomaly signal of a moving target is easily affected by a space interference magnetic field and is difficult to represent, the method measures two groups of vector gradient signals of the same target by utilizing a high-sensitivity tunnel magnetoresistance sensor and based on the magnetic anomaly detection principle; the vector gradient waveform is greater in amplitude variation and is clearer than the vector component waveform, and has a better magnetic target information acquisition capability,so that influence of the interference magnetic field is eliminated effectively, and the method is higher in reliability in the aspect of magnetic target information evaluation; through correction andcomparison of the two groups of vector gradient, accuracy of target information evaluation is improved, and instantaneous velocity of the target is measured more easily; and through the application of the ultra-high-sensitivity and high-signal-to-noise-ratio tunnel magnetoresistance sensor, effectiveness of the detection data is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic detection, and in particular relates to a method for detecting a magnetic moving target. Background technique [0002] Magnetic moving targets occupy an important position in the military and civilian fields, and their detection and identification are of great significance. For example, in the military, magnetic targets such as tanks, infantry fighting vehicles, and self-propelled artillery have good maneuverability and high threat coefficients, and are important military equipment for various countries. Using the reconnaissance and surveillance system to perceive and identify them, and grasping trends in time is one of the common measures to deal with the enemy, and it is also the guarantee for correct command and decision-making and precise strike targets; in the field of logistics and transportation, due to the rapid economic development in these years, the number of vehicles has increa...

AI Technical Summary

Problems solved by technology

[0004] At present, the detection of magnetic moving targets based on magnetic anomalies is mainly to bury the detector nodes equipped with magnetic sensors underground, and to judge the target information by collecting the magnetic anomaly vector component signals of moving targets passing above them. The problems are: the sensitivity of the sensor is not high, the signal-to-noise ratio is low, it is difficult to identify and distinguish the magnetic anomaly signal, and it is easy to cause missed detection or misjudgment; the signal representation method using a single magnetic anomaly vector component is easily affected by the surrounding interference magnetic field background, Moreover, the amount of collected information is small, which may cause misjudgment of the target, and the reliability is not high.

Images