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Geomagnetic matching and PDR (Pedestrian Dead Reckoning) fusion indoor positioning method based on intelligent terminal

A smart terminal and geomagnetic matching technology, which is applied in ground navigation, surveying and navigation, measuring devices, etc., can solve problems that affect matching accuracy

Active Publication Date: 2018-06-29
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

Geomagnetic matching positioning technology has no error accumulation, but there will be points with similar magnetic field values, which will affect the matching accuracy

Method used

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  • Geomagnetic matching and PDR (Pedestrian Dead Reckoning) fusion indoor positioning method based on intelligent terminal
  • Geomagnetic matching and PDR (Pedestrian Dead Reckoning) fusion indoor positioning method based on intelligent terminal
  • Geomagnetic matching and PDR (Pedestrian Dead Reckoning) fusion indoor positioning method based on intelligent terminal

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the following embodiments are based on the technical solution and give detailed implementation and specific operation procedures, but the scope of protection of the present invention is not limited to this Examples.

[0068] Such as figure 1 As shown, the present invention mainly includes two main steps: the establishment of the geomagnetic fingerprint database in the offline phase and the fusion positioning in the online phase. To achieve high-precision passive indoor positioning, the advantages of geomagnetic matching positioning and pedestrian dead reckoning positioning technology must be integrated. Neither the acquisition phase nor the positioning phase requires the help of external facilities and high-precision equipment. Only in the smart terminals used by people, the low positioning cost will promote the rapid development of indoor positioni...

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Abstract

The invention discloses a geomagnetic matching and PDR (Pedestrian Dead Reckoning) fusion indoor positioning method based on an intelligent terminal. A user can realize the positioning only by using the intelligent terminal; the data collection is performed by using a cheap sensor of the intelligent terminal; the additional arrangement of equipment and positioning equipment is not needed; the price is low; the positioning mode is simple. The PDR and geomagnetic matching positing fusion is utilized; the defects of PDR accumulation errors and too long geomagnetic matching time can be overcome; meanwhile, the precision and the efficiency of the single positioning mode are improved.

Description

Technical field [0001] The invention relates to the field of indoor positioning, and in particular to a method for indoor fusion positioning of a user by using smart terminals (mobile phones, tablets) to acquire self-contained multiple sensor data. Background technique [0002] The Global Navigation Positioning System (GNSS) can provide high-precision outdoor location services, which plays an important role in social development. However, because satellite signals are easily blocked by buildings, it is difficult to use Beidou and GPS technology for positioning in an indoor environment. Indoor positioning technology is undoubtedly the key to solving the "last metre" problem of location services (LBS). [0003] With the continuous development of semiconductor technology and its microchip technology, smart terminal equipment integrates more and more sensor devices, including acceleration sensors, magnetic sensors, gyroscopes, wireless network cards, etc. These sensors are gradually be...

Claims

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Application Information

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IPC IPC(8): G01C21/20G01C21/08
CPCG01C21/08G01C21/206
Inventor 陈国良张超曹晓祥王睿
Owner CHINA UNIV OF MINING & TECH
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