Indoor locating method oriented to non-specific Wi-Fi equipment

An indoor positioning and equipment technology, applied in positioning, measuring devices, instruments, etc., can solve problems such as the deterioration of the accuracy and stability of the indoor positioning system, and the decline in positioning accuracy, so as to improve accuracy, solve positioning problems, and improve positioning accuracy. Effect

Inactive Publication Date: 2014-07-09
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional indoor positioning technology based on Wi-Fi location fingerprints, most of them only use one wireless network card to collect the received signal strength data when construct

Method used

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  • Indoor locating method oriented to non-specific Wi-Fi equipment
  • Indoor locating method oriented to non-specific Wi-Fi equipment
  • Indoor locating method oriented to non-specific Wi-Fi equipment

Examples

Experimental program
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Embodiment Construction

[0039] Such as figure 1 As shown, the specific Wi-Fi environment positioning method for non-specific Wi-Fi devices includes two parts: location fingerprint library construction and location calculation.

[0040] figure 2 Schematic diagram of the construction for the location fingerprinting library.

[0041] When constructing the location fingerprint database, firstly, the room is divided into multiple parts. According to the area and positioning accuracy requirements of each part, each part is divided into multiple grids of the same size, and the center of each grid is used as a reference point. Received signal strength data from all Wi-Fi access points is then collected at each reference point and a location fingerprint is stored. If use F i Indicates the location fingerprint at the i-th reference point, and the location fingerprint can be expressed as follows:

[0042] F i = ...

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Abstract

The invention provides an indoor locating method oriented to non-specific Wi-Fi equipment. The method comprises the steps that reference points are arranged in an indoor environment, and first Wi-Fi equipment is used for detecting received signal strength of all Wi-Fi access points at the reference points and multiple related points on the peripheries of the reference points to establish a Wi-Fi position fingerprint database; second Wi-Fi equipment is used at the position to be located to collect the received signal strength data from all the Wi-Fi access points, and data processing is carried out; the similarity of data space distribution of received signal strength nearby the position to be located and the data space distribution of received signal strength of each reference point is calculated, and the position coordinates of the position to be located are estimated. According to the indoor locating method oriented to the non-specific Wi-Fi equipment, the received signal strength data in eight directions around the reference points are stored when the Wi-Fi position fingerprint database is established, and the precision of locating is improved. When locating calculation is carried out, the spatial similarity degree of the position to be located and each reference point in the Wi-Fi position fingerprint database is taken into consideration, the locating precision problem of Wi-Fi equipment of different types is solved effectively, and the robustness of a system is improved.

Description

technical field [0001] The present invention relates to an indoor positioning method, in particular to an indoor positioning method for non-specific Wi-Fi equipment. Background technique [0002] With the rapid development of the national economy and science and technology, people's demand for location-based services in daily life is increasing, and how to accurately determine the user's location is the basis and key to realize location-based services. At present, people spend most of their time living and working in indoor environments such as buildings, shopping malls, and restaurants. High-precision indoor positioning technology can effectively improve work efficiency and quality of life, and the demand for indoor positioning services is increasing. In recent years, with the continuous development of science and technology, wireless local area networks have become more and more popular, more and more indoor environments have been equipped with wireless access points, and ...

Claims

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Application Information

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IPC IPC(8): G01S5/00
CPCH04W64/00
Inventor 王景成王占斌苗浩轩乐文华赵广磊
Owner SHANGHAI JIAO TONG UNIV
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