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

An indoor positioning and geomagnetic technology, used in ground navigation, measurement devices, surveying and navigation, etc., can solve the problems of less information dimension, complex mobile magnetic trajectory matching algorithm, low accuracy of collected information, etc., to achieve high-precision positioning and reduce deployment. cost effect

Inactive Publication Date: 2014-08-13
BEIJING TIANDIFANGYUAN TECH
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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 dimen

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

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the content of the present invention.

[0047] now refer to figure 1, in step 1, determine the initial location area of ​​the user indoors, and distribute a plurality of particles along the reachable path area within the determined initial location area. Here, various existing indoor positioning methods may be used to determine the initial position of the user indoors. Then take the area within a certain distance from the user's initial position as the user's initial indoor position area. For example, it can be a circle with a radius of 10 meters centered on the user's initial position. The r...

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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...

Claims

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Application Information

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IPC IPC(8): G01C21/08
CPCG01C21/206G01C21/08
Inventor 罗丹邵文华赵方
Owner BEIJING TIANDIFANGYUAN TECH
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