Shaft frequency magnetic anomaly signal processing method based on magnetic buoy
A signal processing and magnetic anomaly technology, which can be used in electrical/magnetic exploration, re-radiation of sound waves, geophysical measurement, etc.
Active Publication Date: 2021-04-23
BEIJING AUTOMATION CONTROL EQUIP INST
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[0003] The invention provides a method for processing shaft-frequency magnetic anomaly signals based on magnetic buoys, which can solve the technical problems of low signal-to-noise ratio and difficult identification of shaft-frequency magnetic field signals in the prior art
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[0015] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0016] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit t...
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The invention provides a shaft frequency magnetic anomaly signal processing method based on a magnetic buoy. The method comprises the following steps: enabling a first magnetic measurement sensor to be placed in a first target monitoring sea area, and enabling a second magnetic measurement sensor to be placed in a second target monitoring sea area; adjusting the distance between the first magnetic measurement sensor and the second magnetic measurement sensor; respectively carrying out sliding window processing on signals obtained by the first magnetic measurement sensor and the second magnetic measurement sensor; taking the monitoring buoy signal in each window as an input signal, taking the base station buoy signal in each window as an expected signal of adaptive filtering, and completing power spectrum analysis of the monitoring buoy signal in each window based on the monitoring buoy signal in each window and the base station buoy signal in each window; and drawing a time-frequency diagram about frequency and time by using the power spectrums in all the windows of the monitoring buoy signal through a background equalization algorithm so as to complete the processing of the shaft frequency magnetic anomaly signal. By applying the technical scheme of the invention, the technical problems of low signal-to-noise ratio and difficulty in identification of the axial frequency magnetic field signal in the prior art are solved.
Description
technical field [0001] The invention relates to the technical field of underwater target magnetic field monitoring, in particular to a magnetic buoy-based shaft-frequency magnetic anomaly signal processing method. Background technique [0002] At present, underwater targets generally have acoustic, magnetic, optical, and electrical characteristics, among which the magnetic pattern feature is one of the important means to detect and identify targets, and the magnetic pattern feature can be subdivided into static magnetic field and axial frequency magnetic field. Since the shaft-frequency magnetic field contains rich information about underwater moving targets, the shaft-frequency signal can be used not only for target detection, but also for subsequent target tracking and identification. Therefore, shaft-frequency magnetic field detection has become a research hotspot at home and abroad in recent years. However, due to factors such as the interference of the marine magnetic f...
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Login to View More IPC IPC(8): G01V3/38
CPCG01V3/38Y02A90/30
Inventor 秦杰江薇王春娥王同雷陈路昭万双爱刘建丰
Owner BEIJING AUTOMATION CONTROL EQUIP INST