Indoor locating method based on geomagnetic information and indoor locating system based on geomagnetic information

Abstract

The invention provides an indoor locating method based on geomagnetic information. The method comprises the steps of determining an initial position area of a user in a room, and distributing a plurality of particles in the area; moving all the particles based on the movement direction and the step length of the user, and updating the coordinates of all the particles; calculating the degree of similarity between the movement of the particles and the movement of the user according to the geomagnetic information before and after the movement of the user and the particles, and updating the weights of the particles based on the degree of similarity. According to the method, the movement of the user is tracked by moving the particles, the weights of the particles can be updated according to map information and the geomagnetic information, and the real-time position of the user can be estimated by carrying out weighted summation on the coordinates of all the particles, so that the user in the room can be located with high accuracy, and the deployment cost is saved.

Description

technical field [0001] The invention belongs to the field of indoor positioning, in particular to an indoor positioning method based on geomagnetism. Background technique [0002] With the rapid development of our country's social economy and the improvement of construction level, large-scale buildings have emerged in various places, such as comprehensive shopping centers, exhibition halls, transportation hubs and indoor playgrounds. While enriching people's daily life, these buildings have also brought a lot of confusion to people: the buildings are bulky, the internal structure is complicated, and the direction identification is difficult. People urgently need to know where they are in the building so that they can quickly find themselves. the destination you want to go to. With the rapid development of wireless communication technology and the increasing popularity of mobile smart terminals, indoor positioning and navigation technology has emerged. Since mobile smart te...

AI Technical Summary

Problems solved by technology

However, the use of geomagnetic information for positioning faces many challenges, such as the fact that the information collected during the training phase has fewer dimensions and the accuracy of the collected information is low, the matching algorithm of the moving magnetic trajectory is complex, and the search calculations are large, etc.

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