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A real-time positioning method for smartphones based on geomagnetism

A smart phone, real-time positioning technology, applied in ground navigation, navigation calculation tools, etc., can solve the problems of unable to eliminate accumulated errors and failures

Active Publication Date: 2019-09-03
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cumulative error in motion cannot be eliminated. As the distance increases, the algorithm will fail

Method used

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  • A real-time positioning method for smartphones based on geomagnetism
  • A real-time positioning method for smartphones based on geomagnetism
  • A real-time positioning method for smartphones based on geomagnetism

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Embodiment Construction

[0038] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0039] The invention provides a real-time positioning method for smart phones based on geomagnetism. First, when a user enters an indoor environment, after passing through a test area, the total geomagnetic amount and geomagnetic component measured by the mobile phone are the same as the standard geomagnetic total amount and geomagnetic component in the test area. Calculate the similarity model of the component, and simulate the total amount of geomagnetism suitable for the mobile phone according to the standard geomagnetic characteristics and trends. The standard geomagnetic total is converted into the theoretical value of the mobile phone according to the similarity mo...

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Abstract

The invention discloses a real-time positioning method for smart phones based on geomagnetism, and proposes a method for one-time acquisition by using a standard geomagnetic acquisition sensor when the indoor environment does not change greatly, and all models of mobile phones can be realized through a similarity matching algorithm The process of permanently using geomagnetic positioning without first performing magnetic acquisition. The method of the invention solves the problem that the user does not need to collect geomagnetic information in advance to establish a geomagnetic fingerprint map when using geomagnetic positioning indoors; at the same time, it solves the problem of differences in the built-in geomagnetic sensors of different mobile phone models; and greatly reduces the cost of geomagnetic positioning. time, improve the positioning accuracy, and reduce the positioning cost.

Description

technical field [0001] The invention relates to an indoor geomagnetic positioning and navigation method, in particular to a geomagnetic-based real-time positioning method for smart phones, and belongs to the technical fields of mobile computing and indoor positioning. Background technique [0002] With the increasing demand for indoor positioning and navigation, the indoor positioning and navigation technology using geomagnetic information as a location fingerprint shows its unique advantages, such as no need for infrastructure, high precision, stability, etc. Large indoor positioning and navigation are completed. [0003] In the traditional geomagnetic positioning algorithm, before using the built-in geomagnetic sensor of the mobile phone to realize geomagnetic positioning and navigation, the user needs to collect the geomagnetic area in advance and establish a geomagnetic fingerprint map. The differences in the built-in sensors of different models of mobile phones will br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20G01C21/08
Inventor 徐小龙顾善植
Owner NANJING UNIV OF POSTS & TELECOMM