Indoor accurately positioning method based on wireless fidelity (WIFI) and acceleration sensor

Abstract

The invention relates to an indoor accurately positioning method based on wireless fidelity (WIFI) and an acceleration sensor. The indoor accurately positioning method based on the WIFI and the acceleration sensor comprises a background server. The background server comprises an indoor architecture structure chart, a wireless switch distribution network diagram formed by surrounding an indoor architecture structure and a coordinate graph of the indoor architecture structure formed according to distributed network signal strength of the wireless switch. According to the indoor accurately positioning method based on the WIFI and the acceleration sensor, position information of a moving object in architecture and three-dimensional information of the acceleration sensor are acquired through an identification code, and then accurate positioning of the moving object in the architecture is achieved, the defects of indoor positioning by using a single WiFi technology are overcome, and dead covers of the coverage of the WiFi are avoided. Due to the fact that the 3rd generation telecommunication (3D) acceleration sensor is capable of reflecting the motion trail of the moving equipment continuously, coverage dead corners are avoided. The indoor accurately positioning method based on the WIFI and the acceleration sensor can adapt to complex environments with large-scale buildings and has the advantages that indoor positioning precision can be improved to be within the range of one meter by combining a motion trail algorithm and the structure of the architecture, high positioning precision is achieved, and indoor-and-outdoor seamless positioning is achieved.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to an indoor precise positioning method based on WIFI and an acceleration sensor. technical background [0002] With the rapid increase of data services and multimedia services, people's demand for positioning and navigation is increasing, especially in complex indoor environments, such as airport halls, exhibition halls, warehouses, supermarkets, libraries, underground parking lots, mines, etc. , it is often necessary to determine the location information of the mobile terminal or its holder, facilities and objects indoors. However, limited by conditions such as positioning time, positioning accuracy, and complex indoor environments, relatively complete positioning technologies cannot be well utilized at present. [0003] The Global Positioning System (GPS) is the most common way to obtain location information in the outdoor environment. However, because satellite signals are ...

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Problems solved by technology

[0007] In addition, WiFi transceivers can only cover areas within a radius of 90 meters, and due to the influence of walls and obstacles, it will cause a series of problems such as multipath attenuation, absorption, and shading, and there will be coverage dead spots in elevators, stairs, etc. Thus affecting its accuracy; WiFi can only locate a range of mobile devices, and cannot describe its trajectory

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