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A system and method for indoor pedestrian positioning based on wifi and magnetic field two-level search

A positioning method, a magnetic field technology, used in services based on location information, positioning, radio wave measurement systems, etc.

Inactive Publication Date: 2021-09-10
YUNNAN UNIVERSITY OF FINANCE AND ECONOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then experiments show that the same magnetic field information is available in different areas, which brings certain problems to the single use of magnetic field positioning. Single use of WIFI or magnetic field positioning usually does not give satisfactory results. Therefore, how to combine magnetic field and WIFI to achieve It is particularly important to realize the search for indoor personnel

Method used

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  • A system and method for indoor pedestrian positioning based on wifi and magnetic field two-level search
  • A system and method for indoor pedestrian positioning based on wifi and magnetic field two-level search
  • A system and method for indoor pedestrian positioning based on wifi and magnetic field two-level search

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Embodiment 1

[0020] Such as figure 1 As shown, the indoor pedestrian positioning system based on WIFI and magnetic field two-stage search provided in this embodiment includes a mobile device 1, a base station 2 and a detector 3, and the base station 2 is connected to the mobile device 1 and the detector 3 through the Internet respectively Carry out data transmission, be provided with first magnetic field sensor 4, WIFI generator 11 and fingerprint identification module 5 on mobile device 1, be provided with second magnetic field sensor 6 and WIFI collector 7 on detector 3, mobile device 1 is positioned by The user carries it, and the mobile device 1 searches the current geographical location information in real time and sends it to the base station 2 in combination with WIFI information, magnetic field information of the current position and fingerprint identification data, and the base station 2 is used to receive the data sent by the mobile device 1 and Save; the detector 3 is carried by...

Embodiment 2

[0028] Such as Figure 4 As shown, in the indoor pedestrian positioning system based on WIFI and magnetic field two-level search provided in this embodiment, in order to improve the search efficiency, a magnetic signal transmitting module 8 and a prompt module 9 are also provided on the mobile device 1, and on the detector 3 A magnetic field signal receiving module 10 is provided, and the magnetic signal transmitting module 8 on the mobile device 1 is composed of a three-axis coil, which radiates an electromagnetic field to space, and the magnetic field signal receiving module 10 is also composed of an orthogonal three-axis coil, and is responsible for receiving the electromagnetic field in the space. The electromagnetic field signal, and through the electromagnetic positioning algorithm inside the detector 3, the specific location information of the mobile device is calculated according to the received data.

[0029] This embodiment also provides a positioning method based on...

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Abstract

An indoor pedestrian positioning system based on WIFI and magnetic field two-stage search disclosed in the present invention includes a mobile device, a base station and a detector, the base station is connected to the mobile device and the detector through the Internet respectively, and a first magnetic field sensor is provided on the mobile device , WIFI generator and fingerprint identification module. The detector is equipped with a second magnetic field sensor and WIFI collector. The mobile device searches the current location in real time and sends it to the base station in combination with WIFI information, magnetic field information of the current location and fingerprint identification data. The base station uses It is used to receive and save the data sent by the mobile device; the detector can detect the current location information, automatically search for WIFI information and current magnetic field information and send it to the base station, and the base station will search internally and store all the data in the same location area as the detector. The data in the detector is downloaded to the detector, and then compared to find the position of the indoor personnel. This structure can improve the efficiency of indoor personnel search.

Description

technical field [0001] The invention relates to an indoor positioning method in the identification field, 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 detect the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/021H04W64/00G01S5/00
CPCG01S5/0036H04W4/021H04W64/006
Inventor 何锋王翔张亚军
Owner YUNNAN UNIVERSITY OF FINANCE AND ECONOMICS