Noise suppression method for magnetic field sensor network

A magnetic field sensor, noise suppression technology, applied in the direction of the size/direction of the magnetic field, instrument, and pattern recognition in the signal, etc., can solve the problems of poor detection effect, affecting the detection rate of intrusion targets, poor noise suppression ability, etc. The effect of strong suppression ability, fast noise suppression and high efficiency

Active Publication Date: 2016-08-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the above methods are all based on noise suppression of a single magnetic field sensor. In the case of SNR<<1, the detection effect of the above method is not good
In addition, many scholars use reference se

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  • Noise suppression method for magnetic field sensor network
  • Noise suppression method for magnetic field sensor network
  • Noise suppression method for magnetic field sensor network

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Embodiment Construction

[0032] The invention requires a certain number of magnetic field sensors with regular arrangement, and uses the characteristics of the interference source and the signal source to generate signals at the sensor network nodes, and uses the spherical harmonic function to decompose the magnetic field signals measured by the sensor network nodes into the superposition of multiple harmonic functions to form a linear Independent vector signal base, which is used to decompose the measured magnetic field signal, separate the signal amplitude corresponding to the signal source and the noise source, and discard the signal amplitude corresponding to the noise source to suppress the noise generated by the magnetic field noise source.

[0033] In an exemplary embodiment of the present invention, a noise suppression method for a magnetic field sensor network is provided. figure 1 It is a schematic diagram of a noise suppression method for a magnetic field sensor network according to an embod...

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Abstract

The invention provides a noise suppression method for a magnetic field sensor network. In the noise suppression method, by using a magnetic field sensor array, in virtue of the characteristic that signals are produced by an interference source and a signal source at nodes of the sensor network, magnetic field signals measured at the nodes of the sensor network are decomposed into superposition of a plurality of harmonic functions by using spherical harmonics, a vector signal base with linear independence is formed, the signal base is used for decomposing the measured magnetic field signals, the signal amplitudes corresponding to a signal source and a noise source are separated, and the signal amplitude corresponding to the noise source is abandoned, so that noise generated by the magnetic field noise source is suppressed.

Description

technical field [0001] The invention relates to the technical field of magnetic field sensors and sensor networks, in particular to a noise suppression method for magnetic field sensor networks. Background technique [0002] In recent years, sensor networks have been widely used in military security, environmental monitoring, biomedical, industrial production and other fields due to their powerful data acquisition capabilities. As a network system for monitoring important ports and waters, the underwater magnetic sensor network has the characteristics of passive detection, high positioning accuracy, short execution time, little influence by the complex environment of shallow seas, and concealment, which is of great significance to maintaining national marine security. [0003] In the actual magnetic field measurement, the complex electromagnetic environment will affect the detection effect of the magnetic sensor network and limit the detection distance of underwater targets....

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Application Information

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IPC IPC(8): G01R33/02G06K9/00
CPCG01R33/02G06F2218/02G06F2218/04
Inventor 方广有刘敦歌许鑫朱万华刘小军
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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