Indoor positioning method based on geomagnetic spectrum and positioning system

Abstract

The invention discloses an indoor positioning method based on a geomagnetic spectrum and a positioning system. The method comprises the following steps: utilizing the difference of the geomagnetic field at different points to store the indoor geomagnetic information and the corresponding position information thereof so as to form a geomagnetic fingerprint database; collecting the indoor geomagnetic information of a to-be-positioned target in real time; utilizing an adaptive genetic particle filter algorithm to perform geomagnetic fingerprint matching on the geomagnetic information of the to-be-positioned target; detecting a moving behavior of the to-be-positioned target; and updating the particle importance weight according to the moving behavior and tracking the target position in real time. According to the invention, the adaptive genetic particle filter algorithm is selected for matching the geomagnetic signal, the problems of particle degeneracy and particle shortage can be effectively solved, the positioning precision and the particle adaptability are promoted, the indoor position sharing service between the users can be realized and the method has a wider application prospect and higher social practical value.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to geomagnetic indoor positioning and position sharing technology, in particular to an indoor positioning method and a positioning system based on a geomagnetic map. Background technique [0002] The emergence and development of the satellite positioning and navigation system has enabled people to have a technical method to obtain the geographic location attributes of things with unprecedented reliability and precision in a vast outdoor space, and has basically solved the problem of accurate positioning in outdoor space. And it has been widely used in the fields of military, resources, transportation, agriculture, animal husbandry and fishery, environment, surveying and mapping, as well as people's daily life. However, due to the attenuation of satellite signals when encountering obstacles, the limitation of not being able to penetrate buildings for indoor positioning and...

AI Technical Summary

Problems solved by technology

[0009] Purpose of the invention: In order to solve the problem of particle degradation and particle shortage in the prior art using the ordinary particle filter algorithm for positioning, the present invention proposes an indoor positioning method and positioning system based on geomagnetic Optimization, improving the quality of the initial particles, quickly completing the positioning and tracking of the user's initial position, improving the positioning accuracy, and having stronger particle adaptability when the user's state changes suddenly

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