吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 316-322.doi: 10.13229/j.cnki.jdxbgxb201701046

• Orginal Article • Previous Articles     Next Articles

Geomagnetic field spatial difference measuring method for underwater geomagnetic navigation technology

ZHAO Ta1, 2, ZHU Xiao-ning1, 2, CHENG De-fu1, 2, ZHOU Zhi-jian1, 2   

  1. 1.National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026,China;
    2.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130026,China
  • Received:2015-12-14 Online:2017-01-20 Published:2017-01-20

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Abstract: In order to accurately measure the geomagnetic field around an underwater vehicle and improve the precision of geomagnetic aided navigation, a spatial difference measuring method is proposed based on multi-sensor. First, a new measurement model of magnetic vector sensors is established by analyzing the magnetic field types and the spatial distribution characteristics around the vehicle. Then, the spatial difference model expression is deduced according to the characteristics of interference magnetic field and its coupling relationship with the magnetic field. The proposed method was compared with traditional method by simulation and ground experiment. Results show that the proposed method can obviously restrain the impact of the interference magnetic field. When the intensity of the outside interference magnetic field is 1000 nT, the measurement error can be controlled under 150 nT by the spatial difference measuring method, which is able to improve the ability of anti-jamming in geomagnetic field measurement.

Key words: information processing, underwater vehicle, geomagnetic navigation, spatial difference model, interference magnetic field

CLC Number: 

  • TH762
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