Indoor pedestrian positioning system and indoor pedestrian positioning method based on WIFI and magnetic field two-level search

A positioning system and magnetic field technology, applied in the field of pattern recognition, to achieve the effect of reducing workload, reducing workload of fingerprint collection, and improving positioning accuracy

Inactive Publication Date: 2016-06-29
SOUTH CHINA UNIV OF TECH
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  • Application Information

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Problems solved by technology

Then experiments show that the same magnetic field information is available in different areas, which brings certain problems to the

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  • Indoor pedestrian positioning system and indoor pedestrian positioning method based on WIFI and magnetic field two-level search
  • Indoor pedestrian positioning system and indoor pedestrian positioning method based on WIFI and magnetic field two-level search
  • Indoor pedestrian positioning system and indoor pedestrian positioning method based on WIFI and magnetic field two-level search

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Embodiment Construction

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation and protection of the present invention are not limited thereto.

[0022] figure 1 It is a system architecture diagram of the present invention, and the present invention is mainly composed of a mobile terminal, a positioning server, a database server and a web server for maintenance.

[0023] The mobile terminal mainly communicates with the server through WIFI or GPRS via the Internet. The mobile terminal is equipped with WIFI acquisition and magnetic field acquisition sensors; the mobile terminal is mainly based on Android and IOS platforms to develop positioning APP applications. The APP application can display the user's location and user walking trajectory in real time. The mobile terminal communicates with the positioning server through the TCP / UDP protocol; the positioning server is mainly used to receive the ...

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Abstract

The invention discloses an indoor pedestrian positioning system and method based on WIFI and magnetic field two-stage search. The system is mainly composed of a mobile terminal and a positioning server. When pedestrians walk indoors with a mobile terminal in hand, they first use WIFI for preliminary positioning. After the WIFI positioning determines the initial coordinates, they use the coordinates to search for magnetic field information within a radius of R to construct a temporary fingerprint database. The magnetic field information measured online is matched with the temporary fingerprint database, and finally the coordinates of the location to be located are obtained. This positioning method makes full use of the effectiveness of WIFI positioning coarse positioning and the accuracy of magnetic field positioning in a small area, while reducing the dependence on WIFI signals and improving the accuracy and reliability of positioning.

Description

technical field [0001] The invention relates to an indoor positioning method in the field of pattern recognition, in particular to an indoor pedestrian positioning system and method based on WIFI and magnetic field two-stage search. Background technique [0002] With the increasing demand for location-based services (LBS), indoor positioning has received more and more attention in recent years. The indoor positioning system based on the WIFI framework has been widely studied in recent years because it does not require additional hardware, has low cost, and is widely deployed. However, because radio signals are easily interfered by the environment, it brings great challenges to the positioning of the WIFI positioning framework, and its positioning accuracy is greatly limited. Usually, the WIFI positioning accuracy can only meet the range of 3 to 5 meters Inside. With the popularity of built-in sensors in smartphones, magnetic field sensors are embedded in smartphones to det...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/04G01C21/08G01C21/20
CPCH04W4/023G01C21/08G01C21/206H04W4/043
Inventor 张梅申文波朱金辉卿婷婷
Owner SOUTH CHINA UNIV OF TECH
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