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Indoor positioning method

An indoor positioning and visual positioning technology, applied in wireless communication, instrumentation, surveying and navigation, etc., can solve the problems of low precision indoor positioning

Inactive Publication Date: 2017-05-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an indoor positioning method, which is a combination of WiFi fingerprint-based positioning and sign-based visual positioning to achieve high-precision indoor positioning. This method overcomes the existing WiFi fingerprint positioning. The technology has low precision and the existing single visual positioning method technology is not suitable for indoor positioning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0057] The first step is to generate a WiFi fingerprint:

[0058] Develop an Android App based on the Java language, obtain the MAC address of the WiFi signal, and generate a txt file and save it in the smartphone, thereby generating a WiFi fingerprint; by figure 2 From the shown embodiment, it can be seen that 17 WiFi signals can be received at a selected sampling point with the App, correspondingly there are 17 MAC addresses, and the fingerprint can be saved by pressing the "Save" button in the smart phone. Save as txt file;

[0059] The second step is to build a WiFi location fingerprint database:

[0060]Select the corridor area in the indoor environment as the positioning area. In this corridor area, select 60 WiFi sampling points. The coordinates of each sampling point are known. Use the installed App to detect the detectable WiFi signal at each sampling point. , obtain its MAC address sequence and save it as a fingerprint in the WiFi location fingerprint database. Th...

Embodiment 2

[0091] In addition to "choose the corridor area under the indoor environment as the positioning area, in the corridor area, select 30 WiFi sampling points; in the selected positioning area, set 30 WiFi sampling points, and collect the data collected by each sampling point The MAC address is used as the fingerprint of the sampling point, and 30 fingerprints can be obtained by traversing all the sampling points, which are stored in the WiFi location fingerprint database, thus completing the construction of the WiFi location fingerprint database. Others are the same as in Embodiment 1.

Embodiment 3

[0093] In addition to "choose the corridor area under the indoor environment as the positioning area, in the corridor area, select 45 WiFi sampling points; in the selected positioning area, set 45 WiFi sampling points, and collect the data collected by each sampling point The MAC address is used as the fingerprint of the sampling point, and 45 fingerprints can be obtained by traversing all the sampling points, which are stored in the WiFi location fingerprint database, thus completing the construction of the WiFi location fingerprint database. Others are the same as in Embodiment 1.

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Abstract

The invention provides an indoor positioning method, and relates to a wireless communication network technology for network management. A method combining positioning based on a WiFi fingerprint and visual positioning based on a label is adopted. The method comprises the following steps: firstly, acquiring a WiFi positioning range and a WiFi positioning coordinate by using a WiFi position fingerprint positioning algorithm; secondly, acquiring a visual positioning coordinate according to feature matching and visual positioning of a tested image; lastly, combining WiFi position fingerprint positioning with visual positioning to realize high-accuracy indoor positioning. By adopting method, the defects that the conventional WiFi fingerprint positioning technology has low accuracy and the conventional single visual positioning method technology is not suitable for indoor positioning are overcome.

Description

technical field [0001] The technical solution of the present invention relates to the wireless communication network technology for the purpose of network management, specifically an indoor positioning method. Background technique [0002] Indoor positioning refers to the realization of position positioning in the indoor environment. It mainly adopts wireless communication, base station positioning, inertial navigation positioning and other technologies to form an indoor position positioning system, so as to realize the position monitoring of people and objects in the indoor space. Due to the complex and changeable indoor environment and the inability to receive GPS (Global Positioning System) signals, it is currently difficult to locate indoors. When satellite positioning cannot be used in the indoor environment, indoor positioning technology is used as an auxiliary positioning of satellite positioning to solve the problem that the satellite signal is weak when it reaches t...

Claims

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Application Information

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IPC IPC(8): H04W64/00G01C21/20G06K9/00
CPCH04W64/00G01C21/206G06V20/36
Inventor 胡钊政谢静茹
Owner HEBEI UNIV OF TECH
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