Indoor positioning method based on geomagnetic fingerprint matching

An indoor positioning and fingerprint technology, which is applied to ground navigation, measuring devices, instruments, etc., can solve the problems of low accuracy and complex attitude acquisition of the carrier, and achieve the goals of improving real-time performance, reducing financial investment, and improving positioning accuracy Effect

Inactive Publication Date: 2020-06-05
XIDIAN UNIV
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Problems solved by technology

In addition, unfortunately, due to the complexity and low precision of the acquisition of the attitude of the carrier, at present, most studies only use the modulus of the magnetic field as the magnetic fingerprint

Method used

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  • Indoor positioning method based on geomagnetic fingerprint matching
  • Indoor positioning method based on geomagnetic fingerprint matching
  • Indoor positioning method based on geomagnetic fingerprint matching

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Embodiment Construction

[0015] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0016] figure 1 It is a schematic flowchart of an indoor positioning method based on geomagnetic fingerprint matching provided by an embodiment of the present invention.

[0017] Such as figure 1 As shown, the indoor positioning method based on geomagnetic fingerprint matching provided by the embodiment of the present invention includes the following steps in sequence:

[0018] A. Magnetic map construction / update: The user terminal obtains the indoor environment map and indoor magnetic fingerprint information and provides them to the server, and then the server generates a magnetic map through a magnetic map construction algorithm and stores it in the server database.

[0019] Among them, the user terminal is a mobile device with an inertial mea...

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Abstract

The invention discloses an indoor positioning method based on geomagnetic fingerprint matching, and the method specifically comprises the following steps that a user terminal firstly provides an indoor environment map and indoor magnetic fingerprint information for a server, and the server generates a magnetic map through a magnetic map construction algorithm and stores the magnetic map in a server database; after the user terminal detects that the user moves, the user terminal generates a magnetic fingerprint and user movement information of the current position, initiates a positioning request to the server and delivers the magnetic fingerprint and the user movement information to the server; after the server receives the positioning request and the user data, a positioning algorithm isstarted for positioning, and a positioning result is returned to the user terminal after positioning operation is completed; and after the user terminal obtains the positioning result, the positioningresult is displayed on the user terminal interface. According to the method, the aspects of magnetic fingerprint generation, magnetic map construction and matching positioning are optimized so that the positioning precision and the positioning real-time performance are improved while the positioning cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sensors, navigation and positioning, and in particular to the field of indoor positioning. Background technique [0002] Today, with the increasing demand for location-based services, the Global Positioning System (GPS) has been able to provide people with accurate outdoor positioning and navigation services. However, because the GPS signal will be blocked by indoor obstacles such as buildings and attenuated, its positioning accuracy indoors is not enough to provide positioning services. For the special indoor environment, researchers have proposed positioning solutions based on various tools, such as WiFi, Bluetooth, ultra-wideband, Zigbee, and magnetic fields. Among these methods, the magnetic field-based method is widely favored by researchers due to its basically zero infrastructure cost and good positioning reliability. At present, this method usually uses pattern matching to locate the indoor envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20G01C21/16G01C21/08
CPCG01C21/08G01C21/165G01C21/206
Inventor 何瑞董亚军刘宇宇
Owner XIDIAN UNIV
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