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Indoor positioning method and system based on intensity difference

An indoor positioning and low-strength technology, applied in navigation computing tools and other directions, can solve the problem of low positioning accuracy, achieve the effect of reducing impact and improving positioning accuracy

Active Publication Date: 2017-05-03
北斗导航位置服务(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defect of low positioning accuracy of the positioning method in the prior art, the present invention provides an indoor positioning method and system that can effectively improve the positioning accuracy

Method used

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  • Indoor positioning method and system based on intensity difference
  • Indoor positioning method and system based on intensity difference
  • Indoor positioning method and system based on intensity difference

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] The indoor positioning method of the present invention is used to realize the positioning of the user terminal, the method is based on intensity difference, and it includes the following steps:

[0048] Step 1), the mobile terminal scans all wifi signals in the room in real time, and establishes a logarithmic "distance-loss" model according to the scanning results. This step further includes:

[0049] Step 1-1), the mobile terminal scans all surrounding wifi signals in real time at time t.

[0050] In this step, the mobile terminal can scan all the wifi signals around it according to a fixed frequency. The indoor location coordinates of the mobile terminal are assumed to be (x, y, 0).

[0051] Step 1-2), uploading and storing the strength information of wifi signals recorded by each mobile terminal.

[0052] In this step, the strength information of wifi sig...

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Abstract

The invention discloses an indoor positioning method based on intensity difference, wherein the method comprises the steps: all indoor WiFi signals are scanned in real time by a mobile terminal, the intensity of each WiFi signal is obtained, and then the logarithmic 'distance-loss' model is established; a Kalman filtering intensity tracking model is established, the intensity of each WiFi signal is filtered based on the model, and the WiFi signal intensity value after noise removal is obtained; and the position of the mobile terminal is calculated by using the difference value of the WiFi signal intensity filtering results of a plurality of adjacent sampling times.

Description

technical field [0001] The invention belongs to the fields of information technology, automatic control and electronic technology, and in particular relates to an indoor positioning method based on intensity difference. Background technique [0002] With the continuous development of location data services, indoor positioning has been widely used in airports, shopping malls, parking lots, mines and other fields. However, due to the complexity of the indoor positioning environment, it is still difficult to meet the actual requirements in terms of positioning accuracy. On the one hand, due to different indoor environments, the overall structure, materials, and location of objects in the room will cause large loss and fluctuations in signal transmission. On the other hand, reflections and diffractions in the room will cause serious multipath effects. , greatly increasing the difficulty of positioning. Although many scholars have carried out a lot of research on indoor positio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
Inventor 曹红杰郭路欧阳玲
Owner 北斗导航位置服务(北京)有限公司