Three-axis magnetic sensor based three-dimensional magnetic field positioning method and system

Abstract

The invention provides a three-axis magnetic sensor based three-dimensional magnetic field positioning method and system capable of positioning a long-distance to-be-positioned signal source under the earth's surface. The three-axis magnetic sensor based three-dimensional magnetic field positioning method comprises the steps of producing an alternating magnetic field signal through a transmitting circuit and a resonance coil, wherein the resonance coil is a serially-connected resonance circuit formed by a round coil and a resonance capacitor; respectively measuring a vector coordinate of magnetic induction intensity of the alternating magnetic field signal for four different detection points on the earth's surface; determining a three-dimensional coordinate value of the to-be-positioned signal source. The system comprises a producing unit for producing the alternating magnetic field signal through the transmitting circuit and the resonance coil, a measuring unit for measuring a vector coordinate of magnetic induction intensity of the alternating magnetic field signal for the four different detection points on the earth's surface and a determining unit for determining the three-dimensional coordinate value of the to-be-positioned signal source, wherein the resonance coil is the serially-connected resonance circuit formed by the round coil and the resonance capacitor. The three-axis magnetic sensor based three-dimensional magnetic field positioning method and system are suitable for the technical field of space magnetic field positioning.

Description

technical field [0001] The invention relates to the technical field of spatial magnetic field positioning, in particular to a three-dimensional magnetic field positioning method and system based on a three-axis magnetic sensor. Background technique [0002] At present, positioning technologies mainly include Global Positioning System (GPS) positioning technology, radio frequency sensor network node positioning technology, inertial navigation positioning technology and magnetic field positioning technology. Both GPS and sensor network positioning use high-frequency electromagnetic waves that cannot penetrate the soil, which limits their use in underground environments. Inertial navigation technology has accumulated errors and is only suitable for auxiliary positioning. Therefore, the magnetic field positioning technology based on the near-field theory is the best means for underground positioning. [0003] In the existing research on magnetic field positioning technology, th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a three-dimensional magnetic field positioning method and system based on a three-axis magnetic sensor to solve the problem that the three-dimensional space positioning technology in the prior art cannot be applied to long-distance positioning under the surface

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