Research on underwater magnetic induction positioning technology
Aiming at the unclear position of the transmitting signal terminal in the underwater target positioning system,this paper proposes a three-dimensional orthogonal coil magnetic induction positio-ning method to make up for the shortcomings of a single coil with less magnetic field information,and ef-fectively solve the problem that a single coil relies heavily on axis alignment and cannot realize spatial po-sitioning.The magnetic dipole mathematical model of a single coil and an omnidirectional coil is estab-lished.The geometric relationship between the three-component value of magnetic induction intensity and its spatial position is analyzed.The feasibility of the positioning technique based on three-dimen-sional orthogonal coil is verified by simulation and experiment.The simulation and test results show that the relative errors of the launch target are as follows:X-axis is 6.70%and 2.09%,Y-axis is 7.73%and 5.64%,Z-axis is 8.74%and 2.06%,the relative error of distance is within 7.0%and 4.3%.
magnetic induction positioningthree-dimensional orthogonal coilmagnetic fieldmagnetic doublet
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