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Passive magnetic signal optimization extraction and detection method for high sampling rate

A technology with high sampling rate and detection method, which is applied in the field of electromagnetic field and microwave, can solve problems such as difficult identification, achieve high reliability and effectiveness, improve identification accuracy, and improve signal-to-noise ratio

Active Publication Date: 2021-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the disturbance generated by the target in such a magnetic environment is often covered by the geomagnetic field and background noise, making it difficult to be accurately identified

Method used

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  • Passive magnetic signal optimization extraction and detection method for high sampling rate
  • Passive magnetic signal optimization extraction and detection method for high sampling rate
  • Passive magnetic signal optimization extraction and detection method for high sampling rate

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Embodiment Construction

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work , all belong to the protection scope of the present invention.

[0057] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top / bottom" etc. are based on the orientations shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specifi...

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Abstract

The invention discloses a passive magnetic signal optimization extraction and detection method for a high sampling rate. The method comprises the following steps: S1, inputting a magnetic signal collected by a magnetic signal detector; S2, suppressing a background magnetic field in the magnetic signal by using an elimination trend function to obtain a magnetic signal after the background magnetic field is suppressed; S3, suppressing white noise in the magnetic signal after the background magnetic field is suppressed by using a digital filter, and obtaining a magnetic signal after the white noise is suppressed; S4, according to the type of the magnetic signal detector, performing framing judgment on the magnetic signal after white noise suppression to obtain candidate samples; S5, inhibiting color noise in the candidate sample by using a whitening filter to obtain a magnetic disturbance signal; and S6, detecting the magnetic disturbance signal by using a standard orthogonal basis function, and outputting a detection result. Compared with the prior art, after the optimized extraction technology designed by the invention is adopted, the target identification distance and the target identification precision are effectively improved, and the result has relatively high reliability and effectiveness.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and relates to a method for optimizing the extraction and detection of passive magnetic signals aimed at high sampling rates. Background technique [0002] In recent years, with the development of magnetic detection theory and sensor technology, the magnetic gradient tensor measurement technology has gradually replaced the magnetic scalar detection method with its high measurement accuracy and rich field parameters, and has been used in the observation of geomagnetic anomalies . At the same time, the research on magnetic target detection and localization method based on magnetic gradient tensor has also become the focus of magnetic detection localization research in recent years. [0003] The geomagnetic field can be equivalent to the magnetic field generated by a magnetic dipole located in the center of the earth, and its distribution law can be obtained by theoret...

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Application Information

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IPC IPC(8): G01V3/08
CPCG01V3/081
Inventor 王毅李荣浩王琦颜坤
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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